thread apply all bt

gistfile1.txt

```
[BEGIN] 2018/1/9 10:07:49
(gdb) thread apply all bt

Thread 75 (LWP 42463):
#0  runtime.futex () at /usr/local/go/src/runtime/sys_linux_amd64.s:439
#1  0x00000000004293f2 in runtime.futexsleep (addr=0x1b13d20 <runtime.mheap_>, val=2, ns=-1)
    at /usr/local/go/src/runtime/os_linux.go:45
#2  0x000000000040f721 in runtime.lock (l=0x1b13d20 <runtime.mheap_>) at /usr/local/go/src/runtime/lock_futex.go:102
#3  0x00000000004222ff in runtime.(*mheap).alloc_m (h=0x1b13d20 <runtime.mheap_>, npage=1, spanclass=12 '\f', large=false, 
    ~r3=0xc43901dec0) at /usr/local/go/src/runtime/mheap.go:639
#4  0x0000000000457ecd in runtime.(*mheap).alloc.func1 () at /usr/local/go/src/runtime/mheap.go:733
#5  0x000000000045a0cb in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:360
#6  0x00000000004226e1 in runtime.(*mheap).alloc (h=0x1b13d20 <runtime.mheap_>, npage=1, spanclass=12 '\f', large=false, 
    needzero=true, ~r4=0xc420040000) at /usr/local/go/src/runtime/mheap.go:732
#7  0x0000000000415234 in runtime.(*mcentral).grow (c=0x1b15370 <runtime.mheap_+5712>, ~r0=0x0)
    at /usr/local/go/src/runtime/mcentral.go:232
#8  0x0000000000414d9a in runtime.(*mcentral).cacheSpan (c=0x1b15370 <runtime.mheap_+5712>, ~r0=0x7f38f81e7268)
    at /usr/local/go/src/runtime/mcentral.go:106
#9  0x00000000004148f4 in runtime.(*mcache).refill (c=0x7f38ff0b98a8, spc=12 '\f', ~r1=0x7f38f81e7268)
    at /usr/local/go/src/runtime/mcache.go:123
#10 0x0000000000456de2 in runtime.(*mcache).nextFree.func1 () at /usr/local/go/src/runtime/malloc.go:557
#11 0x000000000045a099 in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:344
#12 0x00000000004304e0 in ?? () at /usr/local/go/src/runtime/proc.go:1070
#13 0x000000c420042600 in ?? ()
#14 0x808b20a025fbcb01 in ?? ()
#15 0x000000cf0dd0a180 in ?? ()
#16 0x000000c8d919fff0 in ?? ()
#17 0x0000000000430544 in runtime.mstart () at /usr/local/go/src/runtime/proc.go:1152
#18 0x000000000045e0c7 in runtime.clone () at /usr/local/go/src/runtime/sys_linux_amd64.s:490
#19 0x0000000000000000 in ?? ()

---Type <return> to continue, or q <return> to quit---
Thread 74 (LWP 28399):
#0  runtime.futex () at /usr/local/go/src/runtime/sys_linux_amd64.s:439
#1  0x00000000004293f2 in runtime.futexsleep (addr=0x1b13d20 <runtime.mheap_>, val=2, ns=-1)
    at /usr/local/go/src/runtime/os_linux.go:45
#2  0x000000000040f721 in runtime.lock (l=0x1b13d20 <runtime.mheap_>) at /usr/local/go/src/runtime/lock_futex.go:102
#3  0x00000000004222ff in runtime.(*mheap).alloc_m (h=0x1b13d20 <runtime.mheap_>, npage=1, spanclass=10 '\n', large=false, 
    ~r3=0x436d1b <runtime.acquirep+43>) at /usr/local/go/src/runtime/mheap.go:639
#4  0x0000000000457ecd in runtime.(*mheap).alloc.func1 () at /usr/local/go/src/runtime/mheap.go:733
#5  0x000000000045a0cb in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:360
#6  0x00000000004226e1 in runtime.(*mheap).alloc (h=0x1b13d20 <runtime.mheap_>, npage=1, spanclass=10 '\n', large=false, 
    needzero=true, ~r4=0xc420025900) at /usr/local/go/src/runtime/mheap.go:732
#7  0x0000000000415234 in runtime.(*mcentral).grow (c=0x1b152f0 <runtime.mheap_+5584>, ~r0=0x0)
    at /usr/local/go/src/runtime/mcentral.go:232
#8  0x0000000000414d9a in runtime.(*mcentral).cacheSpan (c=0x1b152f0 <runtime.mheap_+5584>, ~r0=0x7f38f8ff86f0)
    at /usr/local/go/src/runtime/mcentral.go:106
#9  0x00000000004148f4 in runtime.(*mcache).refill (c=0x7f38ff0a38b0, spc=10 '\n', ~r1=0x7f38f8ff86f0)
    at /usr/local/go/src/runtime/mcache.go:123
#10 0x0000000000456de2 in runtime.(*mcache).nextFree.func1 () at /usr/local/go/src/runtime/malloc.go:557
#11 0x000000000045a099 in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:344
#12 0x00000000004304e0 in ?? () at /usr/local/go/src/runtime/proc.go:1070
#13 0x000000c420026c00 in ?? ()
#14 0x000000000045cbd1 in runtime.goexit () at /usr/local/go/src/runtime/asm_amd64.s:2337
#15 0x000000c594316480 in ?? ()
#16 0x000000c4fbd4bff0 in ?? ()
#17 0x0000000000430544 in runtime.mstart () at /usr/local/go/src/runtime/proc.go:1152
#18 0x000000000045e0c7 in runtime.clone () at /usr/local/go/src/runtime/sys_linux_amd64.s:490
#19 0x000000c4937b41e8 in ?? ()
#20 0x0000000000000004 in ?? ()
#21 0x000000c4937b41ed in ?? ()
---Type <return> to continue, or q <return> to quit---
#22 0x0000000000000002 in ?? ()
#23 0x000000c4937b41f0 in ?? ()
#24 0x0000000000000002 in ?? ()
#25 0x000000c4937b41f3 in ?? ()
#26 0x0000000000000002 in ?? ()
#27 0x000000c4937b41f6 in ?? ()
#28 0x0000000000000002 in ?? ()
#29 0x000000c4937b41f9 in ?? ()
#30 0x0000000000000002 in ?? ()
#31 0x0000000000000000 in ?? ()

Thread 73 (LWP 28398):
#0  runtime.futex () at /usr/local/go/src/runtime/sys_linux_amd64.s:439
#1  0x00000000004293f2 in runtime.futexsleep (addr=0x1b13d20 <runtime.mheap_>, val=2, ns=-1)
    at /usr/local/go/src/runtime/os_linux.go:45
#2  0x000000000040f721 in runtime.lock (l=0x1b13d20 <runtime.mheap_>) at /usr/local/go/src/runtime/lock_futex.go:102
#3  0x00000000004222ff in runtime.(*mheap).alloc_m (h=0x1b13d20 <runtime.mheap_>, npage=4, spanclass=133 '\205', large=false, 
    ~r3=0xc4fbd49e70) at /usr/local/go/src/runtime/mheap.go:639
#4  0x0000000000457ecd in runtime.(*mheap).alloc.func1 () at /usr/local/go/src/runtime/mheap.go:733
#5  0x000000000045a0cb in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:360
#6  0x00000000004226e1 in runtime.(*mheap).alloc (h=0x1b13d20 <runtime.mheap_>, npage=4, spanclass=133 '\205', large=false, 
    needzero=true, ~r4=0x459f52 <runtime.gogo+50>) at /usr/local/go/src/runtime/mheap.go:732
#7  0x0000000000415234 in runtime.(*mcentral).grow (c=0x1b171b0 <runtime.mheap_+13456>, ~r0=0x0)
    at /usr/local/go/src/runtime/mcentral.go:232
#8  0x0000000000414d9a in runtime.(*mcentral).cacheSpan (c=0x1b171b0 <runtime.mheap_+13456>, ~r0=0xc420000180)
    at /usr/local/go/src/runtime/mcentral.go:106
#9  0x00000000004148f4 in runtime.(*mcache).refill (c=0x7f38ff0a16c8, spc=133 '\205', ~r1=0xc594316180)
    at /usr/local/go/src/runtime/mcache.go:123
#10 0x0000000000456de2 in runtime.(*mcache).nextFree.func1 () at /usr/local/go/src/runtime/malloc.go:557
---Type <return> to continue, or q <return> to quit---
#11 0x000000000045a099 in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:344
#12 0x00000000004304e0 in ?? () at /usr/local/go/src/runtime/proc.go:1070
#13 0x000000c42003b300 in ?? ()
#14 0x000000000045cbd1 in runtime.goexit () at /usr/local/go/src/runtime/asm_amd64.s:2337
#15 0x000000c594316180 in ?? ()
#16 0x000000c4fbd49ff0 in ?? ()
#17 0x0000000000430544 in runtime.mstart () at /usr/local/go/src/runtime/proc.go:1152
#18 0x000000000045e0c7 in runtime.clone () at /usr/local/go/src/runtime/sys_linux_amd64.s:490
#19 0x0000000000000000 in ?? ()

Thread 72 (LWP 43222):
#0  runtime.futex () at /usr/local/go/src/runtime/sys_linux_amd64.s:439
#1  0x00000000004293f2 in runtime.futexsleep (addr=0x1b13d20 <runtime.mheap_>, val=2, ns=-1)
    at /usr/local/go/src/runtime/os_linux.go:45
#2  0x000000000040f721 in runtime.lock (l=0x1b13d20 <runtime.mheap_>) at /usr/local/go/src/runtime/lock_futex.go:102
#3  0x00000000004222ff in runtime.(*mheap).alloc_m (h=0x1b13d20 <runtime.mheap_>, npage=1, spanclass=12 '\f', large=false, 
    ~r3=0x436d1b <runtime.acquirep+43>) at /usr/local/go/src/runtime/mheap.go:639
#4  0x0000000000457ecd in runtime.(*mheap).alloc.func1 () at /usr/local/go/src/runtime/mheap.go:733
#5  0x000000000045a0cb in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:360
#6  0x00000000004226e1 in runtime.(*mheap).alloc (h=0x1b13d20 <runtime.mheap_>, npage=1, spanclass=12 '\f', large=false, 
    needzero=true, ~r4=0xc42004c000) at /usr/local/go/src/runtime/mheap.go:732
#7  0x0000000000415234 in runtime.(*mcentral).grow (c=0x1b15370 <runtime.mheap_+5712>, ~r0=0x0)
    at /usr/local/go/src/runtime/mcentral.go:232
#8  0x0000000000414d9a in runtime.(*mcentral).cacheSpan (c=0x1b15370 <runtime.mheap_+5712>, ~r0=0x7f38ed9c65f0)
    at /usr/local/go/src/runtime/mcentral.go:106
#9  0x00000000004148f4 in runtime.(*mcache).refill (c=0x7f38ff0bad00, spc=12 '\f', ~r1=0x7f38ed9c65f0)
    at /usr/local/go/src/runtime/mcache.go:123
#10 0x0000000000456de2 in runtime.(*mcache).nextFree.func1 () at /usr/local/go/src/runtime/malloc.go:557
#11 0x000000000045a099 in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:344
---Type <return> to continue, or q <return> to quit---
#12 0x00000000004304e0 in ?? () at /usr/local/go/src/runtime/proc.go:1070
#13 0x000000c42004d300 in ?? ()
#14 0x000000000045cbd1 in runtime.goexit () at /usr/local/go/src/runtime/asm_amd64.s:2337
#15 0x000000c505d00c00 in ?? ()
#16 0x000000c43eb43ff0 in ?? ()
#17 0x0000000000430544 in runtime.mstart () at /usr/local/go/src/runtime/proc.go:1152
#18 0x000000000045e0c7 in runtime.clone () at /usr/local/go/src/runtime/sys_linux_amd64.s:490
#19 0x0000000000000000 in ?? ()

Thread 71 (LWP 43221):
#0  runtime.futex () at /usr/local/go/src/runtime/sys_linux_amd64.s:439
#1  0x00000000004293f2 in runtime.futexsleep (addr=0x1b13d20 <runtime.mheap_>, val=2, ns=-1)
    at /usr/local/go/src/runtime/os_linux.go:45
#2  0x000000000040f721 in runtime.lock (l=0x1b13d20 <runtime.mheap_>) at /usr/local/go/src/runtime/lock_futex.go:102
#3  0x00000000004222ff in runtime.(*mheap).alloc_m (h=0x1b13d20 <runtime.mheap_>, npage=1, spanclass=12 '\f', large=false, 
    ~r3=0x436d1b <runtime.acquirep+43>) at /usr/local/go/src/runtime/mheap.go:639
#4  0x0000000000457ecd in runtime.(*mheap).alloc.func1 () at /usr/local/go/src/runtime/mheap.go:733
#5  0x000000000045a0cb in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:360
#6  0x00000000004226e1 in runtime.(*mheap).alloc (h=0x1b13d20 <runtime.mheap_>, npage=1, spanclass=12 '\f', large=false, 
    needzero=true, ~r4=0xc420020c00) at /usr/local/go/src/runtime/mheap.go:732
#7  0x0000000000415234 in runtime.(*mcentral).grow (c=0x1b15370 <runtime.mheap_+5712>, ~r0=0x0)
    at /usr/local/go/src/runtime/mcentral.go:232
#8  0x0000000000414d9a in runtime.(*mcentral).cacheSpan (c=0x1b15370 <runtime.mheap_+5712>, ~r0=0x7f38fe5c57b8)
    at /usr/local/go/src/runtime/mcentral.go:106
#9  0x00000000004148f4 in runtime.(*mcache).refill (c=0x7f38ff0b11e0, spc=12 '\f', ~r1=0x7f38fe5c57b8)
    at /usr/local/go/src/runtime/mcache.go:123
#10 0x0000000000456de2 in runtime.(*mcache).nextFree.func1 () at /usr/local/go/src/runtime/malloc.go:557
#11 0x000000000045a099 in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:344
#12 0x00000000004304e0 in ?? () at /usr/local/go/src/runtime/proc.go:1070
---Type <return> to continue, or q <return> to quit---
#13 0x000000c42004e600 in ?? ()
#14 0x000000c427304120 in ?? ()
#15 0x000000c43c20e300 in ?? ()
#16 0x000000c4adde7ff0 in ?? ()
#17 0x0000000000430544 in runtime.mstart () at /usr/local/go/src/runtime/proc.go:1152
#18 0x000000000045e0c7 in runtime.clone () at /usr/local/go/src/runtime/sys_linux_amd64.s:490
#19 0x000000c4acf88000 in ?? ()
#20 0x0000000000000000 in ?? ()

Thread 70 (LWP 34058):
#0  runtime.futex () at /usr/local/go/src/runtime/sys_linux_amd64.s:439
#1  0x00000000004293f2 in runtime.futexsleep (addr=0x1b13d20 <runtime.mheap_>, val=2, ns=-1)
    at /usr/local/go/src/runtime/os_linux.go:45
#2  0x000000000040f721 in runtime.lock (l=0x1b13d20 <runtime.mheap_>) at /usr/local/go/src/runtime/lock_futex.go:102
#3  0x00000000004222ff in runtime.(*mheap).alloc_m (h=0x1b13d20 <runtime.mheap_>, npage=1, spanclass=12 '\f', large=false, ~r3=0x0)
    at /usr/local/go/src/runtime/mheap.go:639
#4  0x0000000000457ecd in runtime.(*mheap).alloc.func1 () at /usr/local/go/src/runtime/mheap.go:733
#5  0x000000000045a0cb in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:360
#6  0x00000000004226e1 in runtime.(*mheap).alloc (h=0x1b13d20 <runtime.mheap_>, npage=1, spanclass=12 '\f', large=false, 
    needzero=true, ~r4=0xc45d2aff08) at /usr/local/go/src/runtime/mheap.go:732
#7  0x0000000000415234 in runtime.(*mcentral).grow (c=0x1b15370 <runtime.mheap_+5712>, ~r0=0x0)
    at /usr/local/go/src/runtime/mcentral.go:232
#8  0x0000000000414d9a in runtime.(*mcentral).cacheSpan (c=0x1b15370 <runtime.mheap_+5712>, ~r0=0x7f38fed2c810)
    at /usr/local/go/src/runtime/mcentral.go:106
#9  0x00000000004148f4 in runtime.(*mcache).refill (c=0x7f38ff0b0b18, spc=12 '\f', ~r1=0x7f38fed2c810)
    at /usr/local/go/src/runtime/mcache.go:123
#10 0x0000000000456de2 in runtime.(*mcache).nextFree.func1 () at /usr/local/go/src/runtime/malloc.go:557
#11 0x000000000045a099 in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:344
#12 0x00000000004304e0 in ?? () at /usr/local/go/src/runtime/proc.go:1070
---Type <return> to continue, or q <return> to quit---
#13 0x000000c420043900 in ?? ()
#14 0x0000000000000000 in ?? ()

Thread 69 (LWP 34057):
#0  runtime.futex () at /usr/local/go/src/runtime/sys_linux_amd64.s:439
#1  0x00000000004293f2 in runtime.futexsleep (addr=0xc4fc2bcb90, val=0, ns=-1) at /usr/local/go/src/runtime/os_linux.go:45
#2  0x000000000040f9ab in runtime.notesleep (n=0xc4fc2bcb90) at /usr/local/go/src/runtime/lock_futex.go:151
#3  0x00000000004315f5 in runtime.stopm () at /usr/local/go/src/runtime/proc.go:1680
#4  0x00000000004327d2 in runtime.findrunnable (gp=0x45cbd1 <runtime.goexit+1>, inheritTime=false)
    at /usr/local/go/src/runtime/proc.go:2135
#5  0x000000000043328c in runtime.schedule () at /usr/local/go/src/runtime/proc.go:2255
#6  0x00000000004335a6 in runtime.park_m (gp=0xc44f618180) at /usr/local/go/src/runtime/proc.go:2318
#7  0x0000000000459ffb in runtime.mcall () at /usr/local/go/src/runtime/asm_amd64.s:286
#8  0x000000c42004c000 in ?? ()
#9  0x0000000000000033 in ?? ()
#10 0x000000c546f4fb00 in ?? ()
#11 0x000000c45d2b3ff0 in ?? ()
#12 0x0000000000430544 in runtime.mstart () at /usr/local/go/src/runtime/proc.go:1152
#13 0x000000000045e0c7 in runtime.clone () at /usr/local/go/src/runtime/sys_linux_amd64.s:490
#14 0x0000000000000000 in ?? ()

Thread 68 (LWP 33702):
#0  runtime.futex () at /usr/local/go/src/runtime/sys_linux_amd64.s:439
#1  0x00000000004293f2 in runtime.futexsleep (addr=0x1b13d20 <runtime.mheap_>, val=2, ns=-1)
    at /usr/local/go/src/runtime/os_linux.go:45
#2  0x000000000040f721 in runtime.lock (l=0x1b13d20 <runtime.mheap_>) at /usr/local/go/src/runtime/lock_futex.go:102
#3  0x00000000004222ff in runtime.(*mheap).alloc_m (h=0x1b13d20 <runtime.mheap_>, npage=1, spanclass=12 '\f', large=false, 
    ~r3=0x433121 <runtime.injectglist+353>) at /usr/local/go/src/runtime/mheap.go:639
#4  0x0000000000457ecd in runtime.(*mheap).alloc.func1 () at /usr/local/go/src/runtime/mheap.go:733
---Type <return> to continue, or q <return> to quit---
#5  0x000000000045a0cb in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:360
#6  0x00000000004226e1 in runtime.(*mheap).alloc (h=0x1b13d20 <runtime.mheap_>, npage=1, spanclass=12 '\f', large=false, 
    needzero=true, ~r4=0xc420038c00) at /usr/local/go/src/runtime/mheap.go:732
#7  0x0000000000415234 in runtime.(*mcentral).grow (c=0x1b15370 <runtime.mheap_+5712>, ~r0=0x0)
    at /usr/local/go/src/runtime/mcentral.go:232
#8  0x0000000000414d9a in runtime.(*mcentral).cacheSpan (c=0x1b15370 <runtime.mheap_+5712>, ~r0=0x7f38f264a1c8)
    at /usr/local/go/src/runtime/mcentral.go:106
#9  0x00000000004148f4 in runtime.(*mcache).refill (c=0x7f38ff0b73c8, spc=12 '\f', ~r1=0x7f38f264a1c8)
    at /usr/local/go/src/runtime/mcache.go:123
#10 0x0000000000456de2 in runtime.(*mcache).nextFree.func1 () at /usr/local/go/src/runtime/malloc.go:557
#11 0x000000000045a099 in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:344
#12 0x00000000004304e0 in ?? () at /usr/local/go/src/runtime/proc.go:1070
#13 0x000000c420037900 in ?? ()
#14 0x0000000000000000 in ?? ()

Thread 67 (LWP 32498):
#0  runtime.futex () at /usr/local/go/src/runtime/sys_linux_amd64.s:439
#1  0x00000000004293f2 in runtime.futexsleep (addr=0xc4ea763d10, val=0, ns=-1) at /usr/local/go/src/runtime/os_linux.go:45
#2  0x000000000040f9ab in runtime.notesleep (n=0xc4ea763d10) at /usr/local/go/src/runtime/lock_futex.go:151
#3  0x00000000004315f5 in runtime.stopm () at /usr/local/go/src/runtime/proc.go:1680
#4  0x00000000004327d2 in runtime.findrunnable (gp=0xc420464a80, inheritTime=false) at /usr/local/go/src/runtime/proc.go:2135
#5  0x000000000043328c in runtime.schedule () at /usr/local/go/src/runtime/proc.go:2255
#6  0x00000000004335a6 in runtime.park_m (gp=0xca01842780) at /usr/local/go/src/runtime/proc.go:2318
#7  0x0000000000459ffb in runtime.mcall () at /usr/local/go/src/runtime/asm_amd64.s:286
#8  0x000000c420043900 in ?? ()
#9  0x000000c427304120 in ?? ()
#10 0x000000c484740300 in ?? ()
#11 0x000000c4421e9ff0 in ?? ()
#12 0x0000000000430544 in runtime.mstart () at /usr/local/go/src/runtime/proc.go:1152
---Type <return> to continue, or q <return> to quit---
#13 0x000000000045e0c7 in runtime.clone () at /usr/local/go/src/runtime/sys_linux_amd64.s:490
#14 0x0000000000000000 in ?? ()

Thread 66 (LWP 32497):
#0  runtime.futex () at /usr/local/go/src/runtime/sys_linux_amd64.s:439
#1  0x00000000004293f2 in runtime.futexsleep (addr=0x1b13d20 <runtime.mheap_>, val=2, ns=-1)
    at /usr/local/go/src/runtime/os_linux.go:45
#2  0x000000000040f721 in runtime.lock (l=0x1b13d20 <runtime.mheap_>) at /usr/local/go/src/runtime/lock_futex.go:102
#3  0x00000000004222ff in runtime.(*mheap).alloc_m (h=0x1b13d20 <runtime.mheap_>, npage=4, spanclass=133 '\205', large=false, 
    ~r3=0x0) at /usr/local/go/src/runtime/mheap.go:639
#4  0x0000000000457ecd in runtime.(*mheap).alloc.func1 () at /usr/local/go/src/runtime/mheap.go:733
#5  0x000000000045a0cb in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:360
#6  0x00000000004226e1 in runtime.(*mheap).alloc (h=0x1b13d20 <runtime.mheap_>, npage=4, spanclass=133 '\205', large=false, 
    needzero=true, ~r4=0x459f52 <runtime.gogo+50>) at /usr/local/go/src/runtime/mheap.go:732
#7  0x0000000000415234 in runtime.(*mcentral).grow (c=0x1b171b0 <runtime.mheap_+13456>, ~r0=0x0)
    at /usr/local/go/src/runtime/mcentral.go:232
#8  0x0000000000414d9a in runtime.(*mcentral).cacheSpan (c=0x1b171b0 <runtime.mheap_+13456>, ~r0=0xc563645e60)
    at /usr/local/go/src/runtime/mcentral.go:106
#9  0x00000000004148f4 in runtime.(*mcache).refill (c=0x7f38ff0b2638, spc=133 '\205', ~r1=0xc492ed2180)
    at /usr/local/go/src/runtime/mcache.go:123
#10 0x0000000000456de2 in runtime.(*mcache).nextFree.func1 () at /usr/local/go/src/runtime/malloc.go:557
#11 0x000000000045a099 in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:344
#12 0x00000000004304e0 in ?? () at /usr/local/go/src/runtime/proc.go:1070
#13 0x000000c42004e600 in ?? ()
#14 0x000000c427304120 in ?? ()
#15 0x000000c492ed2180 in ?? ()
#16 0x000000c52437fff0 in ?? ()
#17 0x0000000000430544 in runtime.mstart () at /usr/local/go/src/runtime/proc.go:1152
#18 0x000000000045e0c7 in runtime.clone () at /usr/local/go/src/runtime/sys_linux_amd64.s:490
---Type <return> to continue, or q <return> to quit---
#19 0x0000000000000000 in ?? ()

Thread 65 (LWP 31990):
#0  runtime.futex () at /usr/local/go/src/runtime/sys_linux_amd64.s:439
#1  0x00000000004293f2 in runtime.futexsleep (addr=0xc470f7d290, val=0, ns=-1) at /usr/local/go/src/runtime/os_linux.go:45
#2  0x000000000040f9ab in runtime.notesleep (n=0xc470f7d290) at /usr/local/go/src/runtime/lock_futex.go:151
#3  0x00000000004315f5 in runtime.stopm () at /usr/local/go/src/runtime/proc.go:1680
#4  0x0000000000434be9 in runtime.exitsyscall0 (gp=0xc42008e300) at /usr/local/go/src/runtime/proc.go:2818
#5  0x0000000000459ffb in runtime.mcall () at /usr/local/go/src/runtime/asm_amd64.s:286
#6  0x000000c420044c00 in ?? ()
#7  0x000000000045cbd1 in runtime.goexit () at /usr/local/go/src/runtime/asm_amd64.s:2337
#8  0x000000c433258c00 in ?? ()
#9  0x000000c4acf87ff0 in ?? ()
#10 0x0000000000430544 in runtime.mstart () at /usr/local/go/src/runtime/proc.go:1152
#11 0x000000000045e0c7 in runtime.clone () at /usr/local/go/src/runtime/sys_linux_amd64.s:490
#12 0x0000000000000000 in ?? ()

Thread 64 (LWP 31981):
#0  runtime.futex () at /usr/local/go/src/runtime/sys_linux_amd64.s:439
#1  0x00000000004293f2 in runtime.futexsleep (addr=0x1b13d20 <runtime.mheap_>, val=2, ns=-1)
    at /usr/local/go/src/runtime/os_linux.go:45
#2  0x000000000040f721 in runtime.lock (l=0x1b13d20 <runtime.mheap_>) at /usr/local/go/src/runtime/lock_futex.go:102
#3  0x00000000004222ff in runtime.(*mheap).alloc_m (h=0x1b13d20 <runtime.mheap_>, npage=4, spanclass=133 '\205', large=false, 
    ~r3=0xc4960dde70) at /usr/local/go/src/runtime/mheap.go:639
#4  0x0000000000457ecd in runtime.(*mheap).alloc.func1 () at /usr/local/go/src/runtime/mheap.go:733
#5  0x000000000045a0cb in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:360
#6  0x00000000004226e1 in runtime.(*mheap).alloc (h=0x1b13d20 <runtime.mheap_>, npage=4, spanclass=133 '\205', large=false, 
    needzero=true, ~r4=0x459f52 <runtime.gogo+50>) at /usr/local/go/src/runtime/mheap.go:732
#7  0x0000000000415234 in runtime.(*mcentral).grow (c=0x1b171b0 <runtime.mheap_+13456>, ~r0=0x0)
---Type <return> to continue, or q <return> to quit---
    at /usr/local/go/src/runtime/mcentral.go:232
#8  0x0000000000414d9a in runtime.(*mcentral).cacheSpan (c=0x1b171b0 <runtime.mheap_+13456>, ~r0=0xc420000180)
    at /usr/local/go/src/runtime/mcentral.go:106
#9  0x00000000004148f4 in runtime.(*mcache).refill (c=0x7f38ff0a1000, spc=133 '\205', ~r1=0xc42ac8a600)
    at /usr/local/go/src/runtime/mcache.go:123
#10 0x0000000000456de2 in runtime.(*mcache).nextFree.func1 () at /usr/local/go/src/runtime/malloc.go:557
#11 0x000000000045a099 in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:344
#12 0x00000000004304e0 in ?? () at /usr/local/go/src/runtime/proc.go:1070
#13 0x000000c42002b900 in ?? ()
#14 0x0000000000000000 in ?? ()

Thread 63 (LWP 31980):
#0  runtime.futex () at /usr/local/go/src/runtime/sys_linux_amd64.s:439
#1  0x00000000004293f2 in runtime.futexsleep (addr=0x1b13d20 <runtime.mheap_>, val=2, ns=-1)
    at /usr/local/go/src/runtime/os_linux.go:45
#2  0x000000000040f721 in runtime.lock (l=0x1b13d20 <runtime.mheap_>) at /usr/local/go/src/runtime/lock_futex.go:102
#3  0x00000000004222ff in runtime.(*mheap).alloc_m (h=0x1b13d20 <runtime.mheap_>, npage=2, spanclass=116 't', large=false, 
    ~r3=0x436d1b <runtime.acquirep+43>) at /usr/local/go/src/runtime/mheap.go:639
#4  0x0000000000457ecd in runtime.(*mheap).alloc.func1 () at /usr/local/go/src/runtime/mheap.go:733
#5  0x000000000045a0cb in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:360
#6  0x00000000004226e1 in runtime.(*mheap).alloc (h=0x1b13d20 <runtime.mheap_>, npage=2, spanclass=116 't', large=false, 
    needzero=true, ~r4=0x100000000000030) at /usr/local/go/src/runtime/mheap.go:732
#7  0x0000000000415234 in runtime.(*mcentral).grow (c=0x1b16d70 <runtime.mheap_+12368>, ~r0=0x0)
    at /usr/local/go/src/runtime/mcentral.go:232
#8  0x0000000000414d9a in runtime.(*mcentral).cacheSpan (c=0x1b16d70 <runtime.mheap_+12368>, 
    ~r0=0x424797 <runtime.removefinalizer+151>) at /usr/local/go/src/runtime/mcentral.go:106
#9  0x00000000004148f4 in runtime.(*mcache).refill (c=0x7f38ff0be638, spc=116 't', ~r1=0xc631a7bef0)
    at /usr/local/go/src/runtime/mcache.go:123
#10 0x0000000000456de2 in runtime.(*mcache).nextFree.func1 () at /usr/local/go/src/runtime/malloc.go:557
---Type <return> to continue, or q <return> to quit---
#11 0x000000000045a099 in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:344
#12 0x00000000004304e0 in ?? () at /usr/local/go/src/runtime/proc.go:1070
#13 0x000000c420054600 in ?? ()
#14 0x0000000000000000 in ?? ()

Thread 62 (LWP 31979):
#0  runtime.futex () at /usr/local/go/src/runtime/sys_linux_amd64.s:439
#1  0x00000000004293f2 in runtime.futexsleep (addr=0x1b13d20 <runtime.mheap_>, val=2, ns=-1)
    at /usr/local/go/src/runtime/os_linux.go:45
#2  0x000000000040f721 in runtime.lock (l=0x1b13d20 <runtime.mheap_>) at /usr/local/go/src/runtime/lock_futex.go:102
#3  0x00000000004222ff in runtime.(*mheap).alloc_m (h=0x1b13d20 <runtime.mheap_>, npage=1, spanclass=10 '\n', large=false, 
    ~r3=0x436d1b <runtime.acquirep+43>) at /usr/local/go/src/runtime/mheap.go:639
#4  0x0000000000457ecd in runtime.(*mheap).alloc.func1 () at /usr/local/go/src/runtime/mheap.go:733
#5  0x000000000045a0cb in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:360
#6  0x00000000004226e1 in runtime.(*mheap).alloc (h=0x1b13d20 <runtime.mheap_>, npage=1, spanclass=10 '\n', large=false, 
    needzero=true, ~r4=0xc42002b900) at /usr/local/go/src/runtime/mheap.go:732
#7  0x0000000000415234 in runtime.(*mcentral).grow (c=0x1b152f0 <runtime.mheap_+5584>, ~r0=0x0)
    at /usr/local/go/src/runtime/mcentral.go:232
#8  0x0000000000414d9a in runtime.(*mcentral).cacheSpan (c=0x1b152f0 <runtime.mheap_+5584>, ~r0=0x7f38f9cd6d60)
    at /usr/local/go/src/runtime/mcentral.go:106
#9  0x00000000004148f4 in runtime.(*mcache).refill (c=0x7f38ff0b91e0, spc=10 '\n', ~r1=0x7f38f9cd6d60)
    at /usr/local/go/src/runtime/mcache.go:123
#10 0x0000000000456de2 in runtime.(*mcache).nextFree.func1 () at /usr/local/go/src/runtime/malloc.go:557
#11 0x000000000045a099 in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:344
#12 0x00000000004304e0 in ?? () at /usr/local/go/src/runtime/proc.go:1070
#13 0x000000c420037900 in ?? ()
#14 0x0000000000000000 in ?? ()

Thread 61 (LWP 31977):
---Type <return> to continue, or q <return> to quit---
#0  runtime.futex () at /usr/local/go/src/runtime/sys_linux_amd64.s:439
#1  0x00000000004293f2 in runtime.futexsleep (addr=0xc48ebb1290, val=0, ns=-1) at /usr/local/go/src/runtime/os_linux.go:45
#2  0x000000000040f9ab in runtime.notesleep (n=0xc48ebb1290) at /usr/local/go/src/runtime/lock_futex.go:151
#3  0x00000000004315f5 in runtime.stopm () at /usr/local/go/src/runtime/proc.go:1680
#4  0x00000000004327d2 in runtime.findrunnable (gp=0xc426be5380, inheritTime=false) at /usr/local/go/src/runtime/proc.go:2135
#5  0x000000000043328c in runtime.schedule () at /usr/local/go/src/runtime/proc.go:2255
#6  0x00000000004335a6 in runtime.park_m (gp=0xc4a8642780) at /usr/local/go/src/runtime/proc.go:2318
#7  0x0000000000459ffb in runtime.mcall () at /usr/local/go/src/runtime/asm_amd64.s:286
#8  0x000000c420046000 in ?? ()
#9  0x0000000000000000 in ?? ()

Thread 60 (LWP 31976):
#0  runtime.futex () at /usr/local/go/src/runtime/sys_linux_amd64.s:439
#1  0x00000000004293f2 in runtime.futexsleep (addr=0x1b13d20 <runtime.mheap_>, val=2, ns=-1)
    at /usr/local/go/src/runtime/os_linux.go:45
#2  0x000000000040f721 in runtime.lock (l=0x1b13d20 <runtime.mheap_>) at /usr/local/go/src/runtime/lock_futex.go:102
#3  0x00000000004222ff in runtime.(*mheap).alloc_m (h=0x1b13d20 <runtime.mheap_>, npage=1, spanclass=10 '\n', large=false, 
    ~r3=0xce11398720) at /usr/local/go/src/runtime/mheap.go:639
#4  0x0000000000457ecd in runtime.(*mheap).alloc.func1 () at /usr/local/go/src/runtime/mheap.go:733
#5  0x000000000045a0cb in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:360
#6  0x00000000004226e1 in runtime.(*mheap).alloc (h=0x1b13d20 <runtime.mheap_>, npage=1, spanclass=10 '\n', large=false, 
    needzero=true, ~r4=0x432265 <runtime.execute+261>) at /usr/local/go/src/runtime/mheap.go:732
#7  0x0000000000415234 in runtime.(*mcentral).grow (c=0x1b152f0 <runtime.mheap_+5584>, ~r0=0x0)
    at /usr/local/go/src/runtime/mcentral.go:232
#8  0x0000000000414d9a in runtime.(*mcentral).cacheSpan (c=0x1b152f0 <runtime.mheap_+5584>, ~r0=0xce3cb2c300)
    at /usr/local/go/src/runtime/mcentral.go:106
#9  0x00000000004148f4 in runtime.(*mcache).refill (c=0x7f38ff0b3a90, spc=10 '\n', ~r1=0xc4903fc101)
    at /usr/local/go/src/runtime/mcache.go:123
#10 0x0000000000456de2 in runtime.(*mcache).nextFree.func1 () at /usr/local/go/src/runtime/malloc.go:557
---Type <return> to continue, or q <return> to quit---
#11 0x000000000045a099 in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:344
#12 0x00000000004304e0 in ?? () at /usr/local/go/src/runtime/proc.go:1070
#13 0x000000c420046000 in ?? ()
#14 0x0000000000000000 in ?? ()

Thread 59 (LWP 31975):
#0  runtime.futex () at /usr/local/go/src/runtime/sys_linux_amd64.s:439
#1  0x00000000004293f2 in runtime.futexsleep (addr=0x1b13d20 <runtime.mheap_>, val=2, ns=-1)
    at /usr/local/go/src/runtime/os_linux.go:45
#2  0x000000000040f721 in runtime.lock (l=0x1b13d20 <runtime.mheap_>) at /usr/local/go/src/runtime/lock_futex.go:102
#3  0x00000000004222ff in runtime.(*mheap).alloc_m (h=0x1b13d20 <runtime.mheap_>, npage=1, spanclass=12 '\f', large=false, 
    ~r3=0x436d1b <runtime.acquirep+43>) at /usr/local/go/src/runtime/mheap.go:639
#4  0x0000000000457ecd in runtime.(*mheap).alloc.func1 () at /usr/local/go/src/runtime/mheap.go:733
#5  0x000000000045a0cb in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:360
#6  0x00000000004226e1 in runtime.(*mheap).alloc (h=0x1b13d20 <runtime.mheap_>, npage=1, spanclass=12 '\f', large=false, 
    needzero=true, ~r4=0xc420028000) at /usr/local/go/src/runtime/mheap.go:732
#7  0x0000000000415234 in runtime.(*mcentral).grow (c=0x1b15370 <runtime.mheap_+5712>, ~r0=0x0)
    at /usr/local/go/src/runtime/mcentral.go:232
#8  0x0000000000414d9a in runtime.(*mcentral).cacheSpan (c=0x1b15370 <runtime.mheap_+5712>, ~r0=0x7f38fd0fa5b0)
    at /usr/local/go/src/runtime/mcentral.go:106
#9  0x00000000004148f4 in runtime.(*mcache).refill (c=0x7f38ff0bc450, spc=12 '\f', ~r1=0x7f38fd0fa5b0)
    at /usr/local/go/src/runtime/mcache.go:123
#10 0x0000000000456de2 in runtime.(*mcache).nextFree.func1 () at /usr/local/go/src/runtime/malloc.go:557
#11 0x000000000045a099 in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:344
#12 0x00000000004304e0 in ?? () at /usr/local/go/src/runtime/proc.go:1070
#13 0x000000c420053300 in ?? ()
#14 0x0000000000000000 in ?? ()

Thread 58 (LWP 31974):
---Type <return> to continue, or q <return> to quit---
#0  runtime.futex () at /usr/local/go/src/runtime/sys_linux_amd64.s:439
#1  0x00000000004293f2 in runtime.futexsleep (addr=0x1b13d20 <runtime.mheap_>, val=2, ns=-1)
    at /usr/local/go/src/runtime/os_linux.go:45
#2  0x000000000040f721 in runtime.lock (l=0x1b13d20 <runtime.mheap_>) at /usr/local/go/src/runtime/lock_futex.go:102
#3  0x00000000004222ff in runtime.(*mheap).alloc_m (h=0x1b13d20 <runtime.mheap_>, npage=1, spanclass=12 '\f', large=false, 
    ~r3=0xc4d132dda0) at /usr/local/go/src/runtime/mheap.go:639
#4  0x0000000000457ecd in runtime.(*mheap).alloc.func1 () at /usr/local/go/src/runtime/mheap.go:733
#5  0x000000000045a0cb in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:360
#6  0x00000000004226e1 in runtime.(*mheap).alloc (h=0x1b13d20 <runtime.mheap_>, npage=1, spanclass=12 '\f', large=false, 
    needzero=true, ~r4=0xc420050c00) at /usr/local/go/src/runtime/mheap.go:732
#7  0x0000000000415234 in runtime.(*mcentral).grow (c=0x1b15370 <runtime.mheap_+5712>, ~r0=0x0)
    at /usr/local/go/src/runtime/mcentral.go:232
#8  0x0000000000414d9a in runtime.(*mcentral).cacheSpan (c=0x1b15370 <runtime.mheap_+5712>, ~r0=0x7f38f97d6250)
    at /usr/local/go/src/runtime/mcentral.go:106
#9  0x00000000004148f4 in runtime.(*mcache).refill (c=0x7f38ff0bf3c8, spc=12 '\f', ~r1=0x7f38f97d6250)
    at /usr/local/go/src/runtime/mcache.go:123
#10 0x0000000000456de2 in runtime.(*mcache).nextFree.func1 () at /usr/local/go/src/runtime/malloc.go:557
#11 0x000000000045a099 in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:344
#12 0x00000000004304e0 in ?? () at /usr/local/go/src/runtime/proc.go:1070
#13 0x000000c420028000 in ?? ()
#14 0x0000000000000000 in ?? ()

Thread 57 (LWP 31971):
#0  runtime.futex () at /usr/local/go/src/runtime/sys_linux_amd64.s:439
#1  0x00000000004293f2 in runtime.futexsleep (addr=0xc47eae2110, val=0, ns=-1) at /usr/local/go/src/runtime/os_linux.go:45
#2  0x000000000040f9ab in runtime.notesleep (n=0xc47eae2110) at /usr/local/go/src/runtime/lock_futex.go:151
#3  0x00000000004315f5 in runtime.stopm () at /usr/local/go/src/runtime/proc.go:1680
#4  0x00000000004327d2 in runtime.findrunnable (gp=0x432265 <runtime.execute+261>, inheritTime=false)
    at /usr/local/go/src/runtime/proc.go:2135
---Type <return> to continue, or q <return> to quit---
#5  0x000000000043328c in runtime.schedule () at /usr/local/go/src/runtime/proc.go:2255
#6  0x00000000004335a6 in runtime.park_m (gp=0xc4b9040480) at /usr/local/go/src/runtime/proc.go:2318
#7  0x0000000000459ffb in runtime.mcall () at /usr/local/go/src/runtime/asm_amd64.s:286
#8  0x000000c420041300 in ?? ()
#9  0x0000000000000000 in ?? ()

Thread 56 (LWP 31970):

#0  runtime.futex () at /usr/local/go/src/runtime/sys_linux_amd64.s:439
#1  0x00000000004293f2 in runtime.futexsleep (addr=0x1b13d20 <runtime.mheap_>, val=2, ns=-1)
    at /usr/local/go/src/runtime/os_linux.go:45
#2  0x000000000040f721 in runtime.lock (l=0x1b13d20 <runtime.mheap_>) at /usr/local/go/src/runtime/lock_futex.go:102
#3  0x00000000004222ff in runtime.(*mheap).alloc_m (h=0x1b13d20 <runtime.mheap_>, npage=1, spanclass=12 '\f', large=false, 
    ~r3=0x436d1b <runtime.acquirep+43>) at /usr/local/go/src/runtime/mheap.go:639
#4  0x0000000000457ecd in runtime.(*mheap).alloc.func1 () at /usr/local/go/src/runtime/mheap.go:733
#5  0x000000000045a0cb in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:360
#6  0x00000000004226e1 in runtime.(*mheap).alloc (h=0x1b13d20 <runtime.mheap_>, npage=1, spanclass=12 '\f', large=false, 
    needzero=true, ~r4=0xc42004ac00) at /usr/local/go/src/runtime/mheap.go:732
#7  0x0000000000415234 in runtime.(*mcentral).grow (c=0x1b15370 <runtime.mheap_+5712>, ~r0=0x0)
    at /usr/local/go/src/runtime/mcentral.go:232
#8  0x0000000000414d9a in runtime.(*mcentral).cacheSpan (c=0x1b15370 <runtime.mheap_+5712>, ~r0=0x7f38eb9d8980)
    at /usr/local/go/src/runtime/mcentral.go:106
#9  0x00000000004148f4 in runtime.(*mcache).refill (c=0x7f38ff0b1f70, spc=12 '\f', ~r1=0x7f38eb9d8980)
    at /usr/local/go/src/runtime/mcache.go:123
#10 0x0000000000456de2 in runtime.(*mcache).nextFree.func1 () at /usr/local/go/src/runtime/malloc.go:557
#11 0x000000000045a099 in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:344
#12 0x00000000004304e0 in ?? () at /usr/local/go/src/runtime/proc.go:1070
#13 0x000000c42004ac00 in ?? ()
#14 0x0000000000000000 in ?? ()

---Type <return> to continue, or q <return> to quit---
Thread 55 (LWP 14642):
#0  runtime.futex () at /usr/local/go/src/runtime/sys_linux_amd64.s:439
#1  0x00000000004293f2 in runtime.futexsleep (addr=0x1b13d20 <runtime.mheap_>, val=2, ns=-1)
    at /usr/local/go/src/runtime/os_linux.go:45
#2  0x000000000040f721 in runtime.lock (l=0x1b13d20 <runtime.mheap_>) at /usr/local/go/src/runtime/lock_futex.go:102
#3  0x00000000004222ff in runtime.(*mheap).alloc_m (h=0x1b13d20 <runtime.mheap_>, npage=1, spanclass=12 '\f', large=false, 
    ~r3=0xc4e4c3cf60) at /usr/local/go/src/runtime/mheap.go:639
#4  0x0000000000457ecd in runtime.(*mheap).alloc.func1 () at /usr/local/go/src/runtime/mheap.go:733
#5  0x000000000045a0cb in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:360
#6  0x00000000004226e1 in runtime.(*mheap).alloc (h=0x1b13d20 <runtime.mheap_>, npage=1, spanclass=12 '\f', large=false, 
    needzero=true, ~r4=0xc420023300) at /usr/local/go/src/runtime/mheap.go:732
#7  0x0000000000415234 in runtime.(*mcentral).grow (c=0x1b15370 <runtime.mheap_+5712>, ~r0=0x0)
    at /usr/local/go/src/runtime/mcentral.go:232
#8  0x0000000000414d9a in runtime.(*mcentral).cacheSpan (c=0x1b15370 <runtime.mheap_+5712>, ~r0=0x7f38e4498730)
    at /usr/local/go/src/runtime/mcentral.go:106
#9  0x00000000004148f4 in runtime.(*mcache).refill (c=0x7f38ff0a4640, spc=12 '\f', ~r1=0x7f38e4498730)
    at /usr/local/go/src/runtime/mcache.go:123
#10 0x0000000000456de2 in runtime.(*mcache).nextFree.func1 () at /usr/local/go/src/runtime/malloc.go:557
#11 0x000000000045a099 in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:344
#12 0x00000000004304e0 in ?? () at /usr/local/go/src/runtime/proc.go:1070
#13 0x000000c42d4301b8 in ?? ()
#14 0x000000000045cbd1 in runtime.goexit () at /usr/local/go/src/runtime/asm_amd64.s:2337
#15 0x000000c42d430180 in ?? ()
#16 0x000000c422ae3ff0 in ?? ()
#17 0x0000000000430544 in runtime.mstart () at /usr/local/go/src/runtime/proc.go:1152
#18 0x000000000045e0c7 in runtime.clone () at /usr/local/go/src/runtime/sys_linux_amd64.s:490
#19 0x0000000000000080 in ?? ()
#20 0x0000000000000005 in ?? ()
#21 0x0000000000000000 in ?? ()
---Type <return> to continue, or q <return> to quit---

Thread 54 (LWP 12382):
#0  runtime.futex () at /usr/local/go/src/runtime/sys_linux_amd64.s:439
#1  0x00000000004293f2 in runtime.futexsleep (addr=0x1b13d20 <runtime.mheap_>, val=2, ns=-1)
    at /usr/local/go/src/runtime/os_linux.go:45
#2  0x000000000040f721 in runtime.lock (l=0x1b13d20 <runtime.mheap_>) at /usr/local/go/src/runtime/lock_futex.go:102
#3  0x00000000004222ff in runtime.(*mheap).alloc_m (h=0x1b13d20 <runtime.mheap_>, npage=1, spanclass=12 '\f', large=false, 
    ~r3=0xc4204b0660) at /usr/local/go/src/runtime/mheap.go:639
#4  0x0000000000457ecd in runtime.(*mheap).alloc.func1 () at /usr/local/go/src/runtime/mheap.go:733
#5  0x000000000045a0cb in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:360
#6  0x00000000004226e1 in runtime.(*mheap).alloc (h=0x1b13d20 <runtime.mheap_>, npage=1, spanclass=12 '\f', large=false, 
    needzero=true, ~r4=0xc42001c000) at /usr/local/go/src/runtime/mheap.go:732
#7  0x0000000000415234 in runtime.(*mcentral).grow (c=0x1b15370 <runtime.mheap_+5712>, ~r0=0x0)
    at /usr/local/go/src/runtime/mcentral.go:232
#8  0x0000000000414d9a in runtime.(*mcentral).cacheSpan (c=0x1b15370 <runtime.mheap_+5712>, ~r0=0x7f38fcd08018)
    at /usr/local/go/src/runtime/mcentral.go:106
#9  0x00000000004148f4 in runtime.(*mcache).refill (c=0x7f38ff0a2458, spc=12 '\f', ~r1=0x7f38fcd08018)
    at /usr/local/go/src/runtime/mcache.go:123
#10 0x0000000000456de2 in runtime.(*mcache).nextFree.func1 () at /usr/local/go/src/runtime/malloc.go:557
#11 0x000000000045a099 in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:344
#12 0x00000000004304e0 in ?? () at /usr/local/go/src/runtime/proc.go:1070
#13 0x000000c420020c00 in ?? ()
#14 0x0000000000000000 in ?? ()

Thread 53 (LWP 12381):
#0  runtime.futex () at /usr/local/go/src/runtime/sys_linux_amd64.s:439
#1  0x00000000004293f2 in runtime.futexsleep (addr=0x1b13d20 <runtime.mheap_>, val=2, ns=-1)
    at /usr/local/go/src/runtime/os_linux.go:45
#2  0x000000000040f721 in runtime.lock (l=0x1b13d20 <runtime.mheap_>) at /usr/local/go/src/runtime/lock_futex.go:102
---Type <return> to continue, or q <return> to quit---
#3  0x00000000004222ff in runtime.(*mheap).alloc_m (h=0x1b13d20 <runtime.mheap_>, npage=1, spanclass=10 '\n', large=false, ~r3=0x0)
    at /usr/local/go/src/runtime/mheap.go:639
#4  0x0000000000457ecd in runtime.(*mheap).alloc.func1 () at /usr/local/go/src/runtime/mheap.go:733
#5  0x000000000045a0cb in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:360
#6  0x00000000004226e1 in runtime.(*mheap).alloc (h=0x1b13d20 <runtime.mheap_>, npage=1, spanclass=10 '\n', large=false, 
    needzero=true, ~r4=0xc42b70bf08) at /usr/local/go/src/runtime/mheap.go:732
#7  0x0000000000415234 in runtime.(*mcentral).grow (c=0x1b152f0 <runtime.mheap_+5584>, ~r0=0x0)
    at /usr/local/go/src/runtime/mcentral.go:232
#8  0x0000000000414d9a in runtime.(*mcentral).cacheSpan (c=0x1b152f0 <runtime.mheap_+5584>, ~r0=0x7f38f024ca20)
    at /usr/local/go/src/runtime/mcentral.go:106
#9  0x00000000004148f4 in runtime.(*mcache).refill (c=0x7f38ff0bd8a8, spc=10 '\n', ~r1=0x7f38f024ca20)
    at /usr/local/go/src/runtime/mcache.go:123
#10 0x0000000000456de2 in runtime.(*mcache).nextFree.func1 () at /usr/local/go/src/runtime/malloc.go:557
#11 0x000000000045a099 in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:344
#12 0x00000000004304e0 in ?? () at /usr/local/go/src/runtime/proc.go:1070
#13 0x000000c420052000 in ?? ()
#14 0x0000000000000000 in ?? ()

Thread 52 (LWP 12380):
#0  runtime.futex () at /usr/local/go/src/runtime/sys_linux_amd64.s:439
#1  0x00000000004293f2 in runtime.futexsleep (addr=0x1b13d20 <runtime.mheap_>, val=2, ns=-1)
    at /usr/local/go/src/runtime/os_linux.go:45
#2  0x000000000040f721 in runtime.lock (l=0x1b13d20 <runtime.mheap_>) at /usr/local/go/src/runtime/lock_futex.go:102
#3  0x00000000004222ff in runtime.(*mheap).alloc_m (h=0x1b13d20 <runtime.mheap_>, npage=4, spanclass=133 '\205', large=false, 
    ~r3=0x0) at /usr/local/go/src/runtime/mheap.go:639
#4  0x0000000000457ecd in runtime.(*mheap).alloc.func1 () at /usr/local/go/src/runtime/mheap.go:733
#5  0x000000000045a0cb in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:360
#6  0x00000000004226e1 in runtime.(*mheap).alloc (h=0x1b13d20 <runtime.mheap_>, npage=4, spanclass=133 '\205', large=false, 
    needzero=true, ~r4=0x459f52 <runtime.gogo+50>) at /usr/local/go/src/runtime/mheap.go:732
---Type <return> to continue, or q <return> to quit---
#7  0x0000000000415234 in runtime.(*mcentral).grow (c=0x1b171b0 <runtime.mheap_+13456>, ~r0=0x0)
    at /usr/local/go/src/runtime/mcentral.go:232
#8  0x0000000000414d9a in runtime.(*mcentral).cacheSpan (c=0x1b171b0 <runtime.mheap_+13456>, ~r0=0xc51e22d260)
    at /usr/local/go/src/runtime/mcentral.go:106
#9  0x00000000004148f4 in runtime.(*mcache).refill (c=0x7f38ff0b33c8, spc=133 '\205', ~r1=0xc42b59c180)
    at /usr/local/go/src/runtime/mcache.go:123
#10 0x0000000000456de2 in runtime.(*mcache).nextFree.func1 () at /usr/local/go/src/runtime/malloc.go:557
#11 0x000000000045a099 in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:344
#12 0x00000000004304e0 in ?? () at /usr/local/go/src/runtime/proc.go:1070
#13 0x000000c420053300 in ?? ()
#14 0x0000000000000000 in ?? ()

Thread 51 (LWP 12379):
#0  runtime.futex () at /usr/local/go/src/runtime/sys_linux_amd64.s:439
#1  0x00000000004293f2 in runtime.futexsleep (addr=0x1b13d20 <runtime.mheap_>, val=2, ns=-1)
    at /usr/local/go/src/runtime/os_linux.go:45
#2  0x000000000040f721 in runtime.lock (l=0x1b13d20 <runtime.mheap_>) at /usr/local/go/src/runtime/lock_futex.go:102
#3  0x00000000004222ff in runtime.(*mheap).alloc_m (h=0x1b13d20 <runtime.mheap_>, npage=4, spanclass=133 '\205', large=false, 
    ~r3=0x0) at /usr/local/go/src/runtime/mheap.go:639
#4  0x0000000000457ecd in runtime.(*mheap).alloc.func1 () at /usr/local/go/src/runtime/mheap.go:733
#5  0x000000000045a0cb in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:360
#6  0x00000000004226e1 in runtime.(*mheap).alloc (h=0x1b13d20 <runtime.mheap_>, npage=4, spanclass=133 '\205', large=false, 
    needzero=true, ~r4=0x459f52 <runtime.gogo+50>) at /usr/local/go/src/runtime/mheap.go:732
#7  0x0000000000415234 in runtime.(*mcentral).grow (c=0x1b171b0 <runtime.mheap_+13456>, ~r0=0x0)
    at /usr/local/go/src/runtime/mcentral.go:232
#8  0x0000000000414d9a in runtime.(*mcentral).cacheSpan (c=0x1b171b0 <runtime.mheap_+13456>, ~r0=0xc4236aaf58)
    at /usr/local/go/src/runtime/mcentral.go:106
#9  0x00000000004148f4 in runtime.(*mcache).refill (c=0x7f38ff0b4450, spc=133 '\205', ~r1=0xc42b534180)
    at /usr/local/go/src/runtime/mcache.go:123
---Type <return> to continue, or q <return> to quit---
#10 0x0000000000456de2 in runtime.(*mcache).nextFree.func1 () at /usr/local/go/src/runtime/malloc.go:557
#11 0x000000000045a099 in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:344
#12 0x00000000004304e0 in ?? () at /usr/local/go/src/runtime/proc.go:1070
#13 0x000000c42004f900 in ?? ()
#14 0x0000000000000000 in ?? ()

Thread 50 (LWP 12378):
#0  runtime.futex () at /usr/local/go/src/runtime/sys_linux_amd64.s:439
#1  0x00000000004293f2 in runtime.futexsleep (addr=0xc42b5e0110, val=0, ns=-1) at /usr/local/go/src/runtime/os_linux.go:45
#2  0x000000000040f9ab in runtime.notesleep (n=0xc42b5e0110) at /usr/local/go/src/runtime/lock_futex.go:151
#3  0x00000000004315f5 in runtime.stopm () at /usr/local/go/src/runtime/proc.go:1680
#4  0x00000000004327d2 in runtime.findrunnable (gp=0xc42094c300, inheritTime=false) at /usr/local/go/src/runtime/proc.go:2135
#5  0x000000000043328c in runtime.schedule () at /usr/local/go/src/runtime/proc.go:2255
#6  0x00000000004335a6 in runtime.park_m (gp=0xc51dec1080) at /usr/local/go/src/runtime/proc.go:2318
#7  0x0000000000459ffb in runtime.mcall () at /usr/local/go/src/runtime/asm_amd64.s:286
#8  0x000000c420054600 in ?? ()
#9  0x0000000000000000 in ?? ()

Thread 49 (LWP 12377):
#0  runtime.futex () at /usr/local/go/src/runtime/sys_linux_amd64.s:439
#1  0x00000000004293f2 in runtime.futexsleep (addr=0xc42b562110, val=0, ns=-1) at /usr/local/go/src/runtime/os_linux.go:45
#2  0x000000000040f9ab in runtime.notesleep (n=0xc42b562110) at /usr/local/go/src/runtime/lock_futex.go:151
#3  0x00000000004315f5 in runtime.stopm () at /usr/local/go/src/runtime/proc.go:1680
#4  0x00000000004327d2 in runtime.findrunnable (gp=0xaa, inheritTime=false) at /usr/local/go/src/runtime/proc.go:2135
#5  0x000000000043328c in runtime.schedule () at /usr/local/go/src/runtime/proc.go:2255
#6  0x00000000004335a6 in runtime.park_m (gp=0xc480386600) at /usr/local/go/src/runtime/proc.go:2318
#7  0x0000000000459ffb in runtime.mcall () at /usr/local/go/src/runtime/asm_amd64.s:286
#8  0x000000c420050c00 in ?? ()
#9  0x0000000000000000 in ?? ()
---Type <return> to continue, or q <return> to quit---

Thread 48 (LWP 12376):
#0  runtime.futex () at /usr/local/go/src/runtime/sys_linux_amd64.s:439
#1  0x00000000004293f2 in runtime.futexsleep (addr=0xc42b280810, val=0, ns=-1) at /usr/local/go/src/runtime/os_linux.go:45
#2  0x000000000040f9ab in runtime.notesleep (n=0xc42b280810) at /usr/local/go/src/runtime/lock_futex.go:151
#3  0x00000000004315f5 in runtime.stopm () at /usr/local/go/src/runtime/proc.go:1680
#4  0x00000000004327d2 in runtime.findrunnable (gp=0xc420b5d200, inheritTime=false) at /usr/local/go/src/runtime/proc.go:2135
#5  0x000000000043328c in runtime.schedule () at /usr/local/go/src/runtime/proc.go:2255
#6  0x00000000004335a6 in runtime.park_m (gp=0xc421526a80) at /usr/local/go/src/runtime/proc.go:2318
#7  0x0000000000459ffb in runtime.mcall () at /usr/local/go/src/runtime/asm_amd64.s:286
#8  0x000000c420052000 in ?? ()
#9  0x000000000045cbd1 in runtime.goexit () at /usr/local/go/src/runtime/asm_amd64.s:2337
#10 0x000000c42a743080 in ?? ()
#11 0x000000c4265c5ff0 in ?? ()
#12 0x0000000000430544 in runtime.mstart () at /usr/local/go/src/runtime/proc.go:1152
#13 0x000000000045e0c7 in runtime.clone () at /usr/local/go/src/runtime/sys_linux_amd64.s:490
#14 0x0000000000000000 in ?? ()

Thread 47 (LWP 12287):
#0  runtime.futex () at /usr/local/go/src/runtime/sys_linux_amd64.s:439
#1  0x00000000004293f2 in runtime.futexsleep (addr=0xc420529290, val=0, ns=-1) at /usr/local/go/src/runtime/os_linux.go:45
#2  0x000000000040f9ab in runtime.notesleep (n=0xc420529290) at /usr/local/go/src/runtime/lock_futex.go:151
#3  0x00000000004315f5 in runtime.stopm () at /usr/local/go/src/runtime/proc.go:1680
#4  0x00000000004327d2 in runtime.findrunnable (gp=0x17, inheritTime=false) at /usr/local/go/src/runtime/proc.go:2135
#5  0x000000000043328c in runtime.schedule () at /usr/local/go/src/runtime/proc.go:2255
#6  0x00000000004335a6 in runtime.park_m (gp=0xc66f828300) at /usr/local/go/src/runtime/proc.go:2318
#7  0x0000000000459ffb in runtime.mcall () at /usr/local/go/src/runtime/asm_amd64.s:286
#8  0x000000c425f321b8 in ?? ()
#9  0x0000000000000000 in ?? ()
---Type <return> to continue, or q <return> to quit---

Thread 46 (LWP 12284):
#0  runtime.futex () at /usr/local/go/src/runtime/sys_linux_amd64.s:439
#1  0x00000000004293f2 in runtime.futexsleep (addr=0x1b13d20 <runtime.mheap_>, val=2, ns=-1)
    at /usr/local/go/src/runtime/os_linux.go:45
#2  0x000000000040f721 in runtime.lock (l=0x1b13d20 <runtime.mheap_>) at /usr/local/go/src/runtime/lock_futex.go:102
#3  0x00000000004222ff in runtime.(*mheap).alloc_m (h=0x1b13d20 <runtime.mheap_>, npage=1, spanclass=10 '\n', large=false, 
    ~r3=0xc584b9a1e0) at /usr/local/go/src/runtime/mheap.go:639
#4  0x0000000000457ecd in runtime.(*mheap).alloc.func1 () at /usr/local/go/src/runtime/mheap.go:733
#5  0x000000000045a0cb in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:360
#6  0x00000000004226e1 in runtime.(*mheap).alloc (h=0x1b13d20 <runtime.mheap_>, npage=1, spanclass=10 '\n', large=false, 
    needzero=true, ~r4=0xc42003b300) at /usr/local/go/src/runtime/mheap.go:732
#7  0x0000000000415234 in runtime.(*mcentral).grow (c=0x1b152f0 <runtime.mheap_+5584>, ~r0=0x0)
    at /usr/local/go/src/runtime/mcentral.go:232
#8  0x0000000000414d9a in runtime.(*mcentral).cacheSpan (c=0x1b152f0 <runtime.mheap_+5584>, ~r0=0x7f38c8300018)
    at /usr/local/go/src/runtime/mcentral.go:106
#9  0x00000000004148f4 in runtime.(*mcache).refill (c=0x7f38ff0b8450, spc=10 '\n', ~r1=0x7f38c8300018)
    at /usr/local/go/src/runtime/mcache.go:123
#10 0x0000000000456de2 in runtime.(*mcache).nextFree.func1 () at /usr/local/go/src/runtime/malloc.go:557
#11 0x000000000045a099 in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:344
#12 0x00000000004304e0 in ?? () at /usr/local/go/src/runtime/proc.go:1070
#13 0x000000c422608ab8 in ?? ()
#14 0x0000000000000000 in ?? ()

Thread 45 (LWP 12282):
#0  runtime.futex () at /usr/local/go/src/runtime/sys_linux_amd64.s:439
#1  0x00000000004293f2 in runtime.futexsleep (addr=0x1b13d20 <runtime.mheap_>, val=2, ns=-1)
    at /usr/local/go/src/runtime/os_linux.go:45
#2  0x000000000040f721 in runtime.lock (l=0x1b13d20 <runtime.mheap_>) at /usr/local/go/src/runtime/lock_futex.go:102
---Type <return> to continue, or q <return> to quit---
#3  0x00000000004222ff in runtime.(*mheap).alloc_m (h=0x1b13d20 <runtime.mheap_>, npage=1, spanclass=2 '\002', large=false, 
    ~r3=0x0) at /usr/local/go/src/runtime/mheap.go:639
#4  0x0000000000457ecd in runtime.(*mheap).alloc.func1 () at /usr/local/go/src/runtime/mheap.go:733
#5  0x000000000045a0cb in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:360
#6  0x00000000004226e1 in runtime.(*mheap).alloc (h=0x1b13d20 <runtime.mheap_>, npage=1, spanclass=2 '\002', large=false, 
    needzero=true, ~r4=0x100000000000030) at /usr/local/go/src/runtime/mheap.go:732
#7  0x0000000000415234 in runtime.(*mcentral).grow (c=0x1b150f0 <runtime.mheap_+5072>, ~r0=0x0)
    at /usr/local/go/src/runtime/mcentral.go:232
#8  0x0000000000414d9a in runtime.(*mcentral).cacheSpan (c=0x1b150f0 <runtime.mheap_+5072>, ~r0=0xc420813fa8)

    at /usr/local/go/src/runtime/mcentral.go:106
#9  0x00000000004148f4 in runtime.(*mcache).refill (c=0x7f38ff0b58a8, spc=2 '\002', ~r1=0x7f38f9a8ef01)
    at /usr/local/go/src/runtime/mcache.go:123
#10 0x0000000000456de2 in runtime.(*mcache).nextFree.func1 () at /usr/local/go/src/runtime/malloc.go:557
#11 0x000000000045a099 in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:344
#12 0x00000000004304e0 in ?? () at /usr/local/go/src/runtime/proc.go:1070
#13 0x000000c421b3c1b8 in ?? ()
#14 0x0000000000000000 in ?? ()

Thread 44 (LWP 12275):
#0  runtime.futex () at /usr/local/go/src/runtime/sys_linux_amd64.s:439
#1  0x00000000004293f2 in runtime.futexsleep (addr=0x1b13d20 <runtime.mheap_>, val=2, ns=-1)
    at /usr/local/go/src/runtime/os_linux.go:45
#2  0x000000000040f721 in runtime.lock (l=0x1b13d20 <runtime.mheap_>) at /usr/local/go/src/runtime/lock_futex.go:102
#3  0x00000000004222ff in runtime.(*mheap).alloc_m (h=0x1b13d20 <runtime.mheap_>, npage=1, spanclass=12 '\f', large=false, ~r3=0x0)
    at /usr/local/go/src/runtime/mheap.go:639
#4  0x0000000000457ecd in runtime.(*mheap).alloc.func1 () at /usr/local/go/src/runtime/mheap.go:733
#5  0x000000000045a0cb in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:360
#6  0x00000000004226e1 in runtime.(*mheap).alloc (h=0x1b13d20 <runtime.mheap_>, npage=1, spanclass=12 '\f', large=false, 
    needzero=true, ~r4=0xc4209d1f08) at /usr/local/go/src/runtime/mheap.go:732
---Type <return> to continue, or q <return> to quit---
#7  0x0000000000415234 in runtime.(*mcentral).grow (c=0x1b15370 <runtime.mheap_+5712>, ~r0=0x0)
    at /usr/local/go/src/runtime/mcentral.go:232
#8  0x0000000000414d9a in runtime.(*mcentral).cacheSpan (c=0x1b15370 <runtime.mheap_+5712>, ~r0=0x7f38fe4e4c60)
    at /usr/local/go/src/runtime/mcentral.go:106
#9  0x00000000004148f4 in runtime.(*mcache).refill (c=0x7f38ff0bb3c8, spc=12 '\f', ~r1=0x7f38fe4e4c60)
    at /usr/local/go/src/runtime/mcache.go:123
#10 0x0000000000456de2 in runtime.(*mcache).nextFree.func1 () at /usr/local/go/src/runtime/malloc.go:557
#11 0x000000000045a099 in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:344
#12 0x00000000004304e0 in ?? () at /usr/local/go/src/runtime/proc.go:1070
#13 0x000000c420b5c338 in ?? ()
#14 0x000000000045cbd1 in runtime.goexit () at /usr/local/go/src/runtime/asm_amd64.s:2337
#15 0x000000c420b5c300 in ?? ()
#16 0x000000c4209d1ff0 in ?? ()
#17 0x0000000000430544 in runtime.mstart () at /usr/local/go/src/runtime/proc.go:1152
#18 0x000000000045e0c7 in runtime.clone () at /usr/local/go/src/runtime/sys_linux_amd64.s:490
#19 0x000000c42098c000 in ?? ()
#20 0x0000000000000000 in ?? ()

Thread 43 (LWP 12274):
#0  runtime.futex () at /usr/local/go/src/runtime/sys_linux_amd64.s:439
#1  0x00000000004293f2 in runtime.futexsleep (addr=0x1b13d20 <runtime.mheap_>, val=2, ns=-1)
    at /usr/local/go/src/runtime/os_linux.go:45
#2  0x000000000040f721 in runtime.lock (l=0x1b13d20 <runtime.mheap_>) at /usr/local/go/src/runtime/lock_futex.go:102
#3  0x00000000004222ff in runtime.(*mheap).alloc_m (h=0x1b13d20 <runtime.mheap_>, npage=1, spanclass=10 '\n', large=false, 
    ~r3=0xc437da3560) at /usr/local/go/src/runtime/mheap.go:639
#4  0x0000000000457ecd in runtime.(*mheap).alloc.func1 () at /usr/local/go/src/runtime/mheap.go:733
#5  0x000000000045a0cb in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:360
#6  0x00000000004226e1 in runtime.(*mheap).alloc (h=0x1b13d20 <runtime.mheap_>, npage=1, spanclass=10 '\n', large=false, 
    needzero=true, ~r4=0xc420053300) at /usr/local/go/src/runtime/mheap.go:732
---Type <return> to continue, or q <return> to quit---
#7  0x0000000000415234 in runtime.(*mcentral).grow (c=0x1b152f0 <runtime.mheap_+5584>, ~r0=0x0)
    at /usr/local/go/src/runtime/mcentral.go:232
#8  0x0000000000414d9a in runtime.(*mcentral).cacheSpan (c=0x1b152f0 <runtime.mheap_+5584>, ~r0=0x7f38cdb2abf0)
    at /usr/local/go/src/runtime/mcentral.go:106
#9  0x00000000004148f4 in runtime.(*mcache).refill (c=0x7f38ff0c0b18, spc=10 '\n', ~r1=0x7f38cdb2abf0)
    at /usr/local/go/src/runtime/mcache.go:123
#10 0x0000000000456de2 in runtime.(*mcache).nextFree.func1 () at /usr/local/go/src/runtime/malloc.go:557
#11 0x000000000045a099 in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:344
#12 0x00000000004304e0 in ?? () at /usr/local/go/src/runtime/proc.go:1070
#13 0x000000c42051fb38 in ?? ()
#14 0x000000000045cbd1 in runtime.goexit () at /usr/local/go/src/runtime/asm_amd64.s:2337
#15 0x000000c42051fb00 in ?? ()
#16 0x000000c420d1dff0 in ?? ()
#17 0x0000000000430544 in runtime.mstart () at /usr/local/go/src/runtime/proc.go:1152
#18 0x000000000045e0c7 in runtime.clone () at /usr/local/go/src/runtime/sys_linux_amd64.s:490
#19 0x000000c420d20000 in ?? ()
#20 0x0000000000000000 in ?? ()

Thread 42 (LWP 12272):
#0  runtime.futex () at /usr/local/go/src/runtime/sys_linux_amd64.s:439
#1  0x00000000004293f2 in runtime.futexsleep (addr=0x1b13d20 <runtime.mheap_>, val=2, ns=-1)
    at /usr/local/go/src/runtime/os_linux.go:45
#2  0x000000000040f721 in runtime.lock (l=0x1b13d20 <runtime.mheap_>) at /usr/local/go/src/runtime/lock_futex.go:102
#3  0x00000000004222ff in runtime.(*mheap).alloc_m (h=0x1b13d20 <runtime.mheap_>, npage=1, spanclass=12 '\f', large=false, 
    ~r3=0xc434a55320) at /usr/local/go/src/runtime/mheap.go:639
#4  0x0000000000457ecd in runtime.(*mheap).alloc.func1 () at /usr/local/go/src/runtime/mheap.go:733
#5  0x000000000045a0cb in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:360
#6  0x00000000004226e1 in runtime.(*mheap).alloc (h=0x1b13d20 <runtime.mheap_>, npage=1, spanclass=12 '\f', large=false, 
    needzero=true, ~r4=0xc420048600) at /usr/local/go/src/runtime/mheap.go:732
---Type <return> to continue, or q <return> to quit---
#7  0x0000000000415234 in runtime.(*mcentral).grow (c=0x1b15370 <runtime.mheap_+5712>, ~r0=0x0)
    at /usr/local/go/src/runtime/mcentral.go:232
#8  0x0000000000414d9a in runtime.(*mcentral).cacheSpan (c=0x1b15370 <runtime.mheap_+5712>, ~r0=0x7f38fef32e48)
    at /usr/local/go/src/runtime/mcentral.go:106
#9  0x00000000004148f4 in runtime.(*mcache).refill (c=0x7f38ff0bcb18, spc=12 '\f', ~r1=0x7f38fef32e48)
    at /usr/local/go/src/runtime/mcache.go:123
#10 0x0000000000456de2 in runtime.(*mcache).nextFree.func1 () at /usr/local/go/src/runtime/malloc.go:557
#11 0x000000000045a099 in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:344
#12 0x00000000004304e0 in ?? () at /usr/local/go/src/runtime/proc.go:1070
#13 0x000000c4204e9cb8 in ?? ()
#14 0x0000000000000004 in ?? ()
#15 0x000000c4204e9c80 in ?? ()
#16 0x000000c4209cdff0 in ?? ()
#17 0x0000000000430544 in runtime.mstart () at /usr/local/go/src/runtime/proc.go:1152
#18 0x000000000045e0c7 in runtime.clone () at /usr/local/go/src/runtime/sys_linux_amd64.s:490
#19 0x000000c4209d0000 in ?? ()
#20 0x0000000000000000 in ?? ()

Thread 41 (LWP 12271):
#0  runtime.futex () at /usr/local/go/src/runtime/sys_linux_amd64.s:439
#1  0x00000000004293f2 in runtime.futexsleep (addr=0xc4203bcf10, val=0, ns=-1) at /usr/local/go/src/runtime/os_linux.go:45
#2  0x000000000040f9ab in runtime.notesleep (n=0xc4203bcf10) at /usr/local/go/src/runtime/lock_futex.go:151
#3  0x00000000004315f5 in runtime.stopm () at /usr/local/go/src/runtime/proc.go:1680
#4  0x00000000004327d2 in runtime.findrunnable (gp=0xc422029c80, inheritTime=false) at /usr/local/go/src/runtime/proc.go:2135
#5  0x000000000043328c in runtime.schedule () at /usr/local/go/src/runtime/proc.go:2255
#6  0x00000000004335a6 in runtime.park_m (gp=0xc53ed20900) at /usr/local/go/src/runtime/proc.go:2318
#7  0x0000000000459ffb in runtime.mcall () at /usr/local/go/src/runtime/asm_amd64.s:286
#8  0x000000c42050b9b8 in ?? ()
#9  0x0000000000000000 in ?? ()
---Type <return> to continue, or q <return> to quit---

Thread 40 (LWP 12270):
#0  runtime.futex () at /usr/local/go/src/runtime/sys_linux_amd64.s:439
#1  0x00000000004293f2 in runtime.futexsleep (addr=0x1b13d20 <runtime.mheap_>, val=2, ns=-1)
    at /usr/local/go/src/runtime/os_linux.go:45
#2  0x000000000040f721 in runtime.lock (l=0x1b13d20 <runtime.mheap_>) at /usr/local/go/src/runtime/lock_futex.go:102
#3  0x00000000004222ff in runtime.(*mheap).alloc_m (h=0x1b13d20 <runtime.mheap_>, npage=1, spanclass=12 '\f', large=false, 
    ~r3=0x436d1b <runtime.acquirep+43>) at /usr/local/go/src/runtime/mheap.go:639
#4  0x0000000000457ecd in runtime.(*mheap).alloc.func1 () at /usr/local/go/src/runtime/mheap.go:733
#5  0x000000000045a0cb in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:360
#6  0x00000000004226e1 in runtime.(*mheap).alloc (h=0x1b13d20 <runtime.mheap_>, npage=1, spanclass=12 '\f', large=false, 
    needzero=true, ~r4=0xc42004c000) at /usr/local/go/src/runtime/mheap.go:732
#7  0x0000000000415234 in runtime.(*mcentral).grow (c=0x1b15370 <runtime.mheap_+5712>, ~r0=0x0)
    at /usr/local/go/src/runtime/mcentral.go:232
#8  0x0000000000414d9a in runtime.(*mcentral).cacheSpan (c=0x1b15370 <runtime.mheap_+5712>, ~r0=0x7f38dde9af80)
    at /usr/local/go/src/runtime/mcentral.go:106
#9  0x00000000004148f4 in runtime.(*mcache).refill (c=0x7f38ff0bdf70, spc=12 '\f', ~r1=0x7f38dde9af80)
    at /usr/local/go/src/runtime/mcache.go:123
#10 0x0000000000456de2 in runtime.(*mcache).nextFree.func1 () at /usr/local/go/src/runtime/malloc.go:557
#11 0x000000000045a099 in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:344
#12 0x00000000004304e0 in ?? () at /usr/local/go/src/runtime/proc.go:1070
#13 0x000000c42050b6b8 in ?? ()
#14 0x0000000000000002 in ?? ()
#15 0x000000c42050b680 in ?? ()
#16 0x000000c42098dff0 in ?? ()
#17 0x0000000000430544 in runtime.mstart () at /usr/local/go/src/runtime/proc.go:1152
#18 0x000000000045e0c7 in runtime.clone () at /usr/local/go/src/runtime/sys_linux_amd64.s:490
#19 0x000000c420990000 in ?? ()
#20 0x0000000000000000 in ?? ()
---Type <return> to continue, or q <return> to quit---

Thread 39 (LWP 12269):
#0  runtime.futex () at /usr/local/go/src/runtime/sys_linux_amd64.s:439
#1  0x00000000004293f2 in runtime.futexsleep (addr=0x1b13d20 <runtime.mheap_>, val=2, ns=-1)
    at /usr/local/go/src/runtime/os_linux.go:45
#2  0x000000000040f721 in runtime.lock (l=0x1b13d20 <runtime.mheap_>) at /usr/local/go/src/runtime/lock_futex.go:102
#3  0x00000000004222ff in runtime.(*mheap).alloc_m (h=0x1b13d20 <runtime.mheap_>, npage=4, spanclass=133 '\205', large=false, 
    ~r3=0x0) at /usr/local/go/src/runtime/mheap.go:639
#4  0x0000000000457ecd in runtime.(*mheap).alloc.func1 () at /usr/local/go/src/runtime/mheap.go:733
#5  0x000000000045a0cb in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:360
#6  0x00000000004226e1 in runtime.(*mheap).alloc (h=0x1b13d20 <runtime.mheap_>, npage=4, spanclass=133 '\205', large=false, 
    needzero=true, ~r4=0x459f52 <runtime.gogo+50>) at /usr/local/go/src/runtime/mheap.go:732
#7  0x0000000000415234 in runtime.(*mcentral).grow (c=0x1b171b0 <runtime.mheap_+13456>, ~r0=0x0)
    at /usr/local/go/src/runtime/mcentral.go:232
#8  0x0000000000414d9a in runtime.(*mcentral).cacheSpan (c=0x1b171b0 <runtime.mheap_+13456>, ~r0=0xc58a84d080)
    at /usr/local/go/src/runtime/mcentral.go:106
#9  0x00000000004148f4 in runtime.(*mcache).refill (c=0x7f38ff0b6638, spc=133 '\205', ~r1=0xc42050b380)
    at /usr/local/go/src/runtime/mcache.go:123
#10 0x0000000000456de2 in runtime.(*mcache).nextFree.func1 () at /usr/local/go/src/runtime/malloc.go:557
#11 0x000000000045a099 in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:344
#12 0x00000000004304e0 in ?? () at /usr/local/go/src/runtime/proc.go:1070
#13 0x000000c420046000 in ?? ()
#14 0x0000000000000000 in ?? ()

Thread 38 (LWP 12268):
#0  runtime.futex () at /usr/local/go/src/runtime/sys_linux_amd64.s:439
#1  0x00000000004293f2 in runtime.futexsleep (addr=0x1b13d20 <runtime.mheap_>, val=2, ns=-1)
    at /usr/local/go/src/runtime/os_linux.go:45
#2  0x000000000040f721 in runtime.lock (l=0x1b13d20 <runtime.mheap_>) at /usr/local/go/src/runtime/lock_futex.go:102
---Type <return> to continue, or q <return> to quit---
#3  0x00000000004222ff in runtime.(*mheap).alloc_m (h=0x1b13d20 <runtime.mheap_>, npage=4, spanclass=133 '\205', large=false, 
    ~r3=0xce2bf09a40) at /usr/local/go/src/runtime/mheap.go:639
#4  0x0000000000457ecd in runtime.(*mheap).alloc.func1 () at /usr/local/go/src/runtime/mheap.go:733
#5  0x000000000045a0cb in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:360
#6  0x00000000004226e1 in runtime.(*mheap).alloc (h=0x1b13d20 <runtime.mheap_>, npage=4, spanclass=133 '\205', large=false, 
    needzero=true, ~r4=0x459f52 <runtime.gogo+50>) at /usr/local/go/src/runtime/mheap.go:732
#7  0x0000000000415234 in runtime.(*mcentral).grow (c=0x1b171b0 <runtime.mheap_+13456>, ~r0=0x0)
    at /usr/local/go/src/runtime/mcentral.go:232
#8  0x0000000000414d9a in runtime.(*mcentral).cacheSpan (c=0x1b171b0 <runtime.mheap_+13456>, ~r0=0xc420000180)
    at /usr/local/go/src/runtime/mcentral.go:106
#9  0x00000000004148f4 in runtime.(*mcache).refill (c=0x7f38ff0b9f70, spc=133 '\205', ~r1=0xc42053ec00)
    at /usr/local/go/src/runtime/mcache.go:123
#10 0x0000000000456de2 in runtime.(*mcache).nextFree.func1 () at /usr/local/go/src/runtime/malloc.go:557
#11 0x000000000045a099 in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:344
#12 0x00000000004304e0 in ?? () at /usr/local/go/src/runtime/proc.go:1070
#13 0x000000c420044c00 in ?? ()
#14 0x0000000000000000 in ?? ()

Thread 37 (LWP 12267):
#0  runtime.futex () at /usr/local/go/src/runtime/sys_linux_amd64.s:439
#1  0x00000000004293f2 in runtime.futexsleep (addr=0x1b13d20 <runtime.mheap_>, val=2, ns=-1)
    at /usr/local/go/src/runtime/os_linux.go:45
#2  0x000000000040f721 in runtime.lock (l=0x1b13d20 <runtime.mheap_>) at /usr/local/go/src/runtime/lock_futex.go:102
#3  0x00000000004222ff in runtime.(*mheap).alloc_m (h=0x1b13d20 <runtime.mheap_>, npage=1, spanclass=12 '\f', large=false, 
    ~r3=0xc523f0e600) at /usr/local/go/src/runtime/mheap.go:639
#4  0x0000000000457ecd in runtime.(*mheap).alloc.func1 () at /usr/local/go/src/runtime/mheap.go:733
#5  0x000000000045a0cb in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:360

#6  0x00000000004226e1 in runtime.(*mheap).alloc (h=0x1b13d20 <runtime.mheap_>, npage=1, spanclass=12 '\f', large=false, 
    needzero=true, ~r4=0x4317b1 <runtime.startm+225>) at /usr/local/go/src/runtime/mheap.go:732
---Type <return> to continue, or q <return> to quit---
#7  0x0000000000415234 in runtime.(*mcentral).grow (c=0x1b15370 <runtime.mheap_+5712>, ~r0=0x0)
    at /usr/local/go/src/runtime/mcentral.go:232
#8  0x0000000000414d9a in runtime.(*mcentral).cacheSpan (c=0x1b15370 <runtime.mheap_+5712>, ~r0=0xc6666a0780)
    at /usr/local/go/src/runtime/mcentral.go:106
#9  0x00000000004148f4 in runtime.(*mcache).refill (c=0x7f38ff0a1d90, spc=12 '\f', ~r1=0xc420413601)
    at /usr/local/go/src/runtime/mcache.go:123
#10 0x0000000000456de2 in runtime.(*mcache).nextFree.func1 () at /usr/local/go/src/runtime/malloc.go:557
#11 0x000000000045a099 in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:344
#12 0x00000000004304e0 in ?? () at /usr/local/go/src/runtime/proc.go:1070
#13 0x000000c420042600 in ?? ()
#14 0x0000000000000000 in ?? ()

Thread 36 (LWP 12266):
#0  runtime.futex () at /usr/local/go/src/runtime/sys_linux_amd64.s:439
#1  0x00000000004293f2 in runtime.futexsleep (addr=0xc420257610, val=0, ns=-1) at /usr/local/go/src/runtime/os_linux.go:45
#2  0x000000000040f9ab in runtime.notesleep (n=0xc420257610) at /usr/local/go/src/runtime/lock_futex.go:151
#3  0x00000000004315f5 in runtime.stopm () at /usr/local/go/src/runtime/proc.go:1680
#4  0x00000000004327d2 in runtime.findrunnable (gp=0xc425e93500, inheritTime=false) at /usr/local/go/src/runtime/proc.go:2135
#5  0x000000000043328c in runtime.schedule () at /usr/local/go/src/runtime/proc.go:2255
#6  0x00000000004335a6 in runtime.park_m (gp=0xc4843ecf00) at /usr/local/go/src/runtime/proc.go:2318
#7  0x0000000000459ffb in runtime.mcall () at /usr/local/go/src/runtime/asm_amd64.s:286
#8  0x000000c4207e30b8 in ?? ()
#9  0x0000000000000000 in ?? ()

Thread 35 (LWP 12265):
#0  runtime.futex () at /usr/local/go/src/runtime/sys_linux_amd64.s:439
#1  0x00000000004293f2 in runtime.futexsleep (addr=0xc420528810, val=0, ns=-1) at /usr/local/go/src/runtime/os_linux.go:45
#2  0x000000000040f9ab in runtime.notesleep (n=0xc420528810) at /usr/local/go/src/runtime/lock_futex.go:151
#3  0x00000000004315f5 in runtime.stopm () at /usr/local/go/src/runtime/proc.go:1680
---Type <return> to continue, or q <return> to quit---
#4  0x00000000004327d2 in runtime.findrunnable (gp=0x17, inheritTime=false) at /usr/local/go/src/runtime/proc.go:2135
#5  0x000000000043328c in runtime.schedule () at /usr/local/go/src/runtime/proc.go:2255
#6  0x00000000004335a6 in runtime.park_m (gp=0xce11b51b00) at /usr/local/go/src/runtime/proc.go:2318
#7  0x0000000000459ffb in runtime.mcall () at /usr/local/go/src/runtime/asm_amd64.s:286
#8  0x000000c4205513b8 in ?? ()
#9  0x0000000000000000 in ?? ()

Thread 34 (LWP 12264):
#0  runtime.futex () at /usr/local/go/src/runtime/sys_linux_amd64.s:439
#1  0x00000000004293f2 in runtime.futexsleep (addr=0xc42008af10, val=0, ns=-1) at /usr/local/go/src/runtime/os_linux.go:45
#2  0x000000000040f9ab in runtime.notesleep (n=0xc42008af10) at /usr/local/go/src/runtime/lock_futex.go:151
#3  0x00000000004315f5 in runtime.stopm () at /usr/local/go/src/runtime/proc.go:1680
#4  0x00000000004327d2 in runtime.findrunnable (gp=0x432265 <runtime.execute+261>, inheritTime=false)
    at /usr/local/go/src/runtime/proc.go:2135
#5  0x000000000043328c in runtime.schedule () at /usr/local/go/src/runtime/proc.go:2255
#6  0x00000000004335a6 in runtime.park_m (gp=0xc46fb3c480) at /usr/local/go/src/runtime/proc.go:2318
#7  0x0000000000459ffb in runtime.mcall () at /usr/local/go/src/runtime/asm_amd64.s:286
#8  0x000000c42003ec00 in ?? ()
#9  0x0000000000000000 in ?? ()

Thread 33 (LWP 12263):
#0  runtime.futex () at /usr/local/go/src/runtime/sys_linux_amd64.s:439
#1  0x00000000004293f2 in runtime.futexsleep (addr=0x1b13d20 <runtime.mheap_>, val=2, ns=-1)
    at /usr/local/go/src/runtime/os_linux.go:45
#2  0x000000000040f721 in runtime.lock (l=0x1b13d20 <runtime.mheap_>) at /usr/local/go/src/runtime/lock_futex.go:102
#3  0x00000000004222ff in runtime.(*mheap).alloc_m (h=0x1b13d20 <runtime.mheap_>, npage=4, spanclass=133 '\205', large=false, 
    ~r3=0xc51499be00) at /usr/local/go/src/runtime/mheap.go:639
#4  0x0000000000457ecd in runtime.(*mheap).alloc.func1 () at /usr/local/go/src/runtime/mheap.go:733
#5  0x000000000045a0cb in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:360
---Type <return> to continue, or q <return> to quit---
#6  0x00000000004226e1 in runtime.(*mheap).alloc (h=0x1b13d20 <runtime.mheap_>, npage=4, spanclass=133 '\205', large=false, 
    needzero=true, ~r4=0x459f52 <runtime.gogo+50>) at /usr/local/go/src/runtime/mheap.go:732
#7  0x0000000000415234 in runtime.(*mcentral).grow (c=0x1b171b0 <runtime.mheap_+13456>, ~r0=0x0)
    at /usr/local/go/src/runtime/mcentral.go:232
#8  0x0000000000414d9a in runtime.(*mcentral).cacheSpan (c=0x1b171b0 <runtime.mheap_+13456>, ~r0=0xc420000180)
    at /usr/local/go/src/runtime/mcentral.go:106
#9  0x00000000004148f4 in runtime.(*mcache).refill (c=0x7f38ff0a2b20, spc=133 '\205', ~r1=0xc420551080)
    at /usr/local/go/src/runtime/mcache.go:123
#10 0x0000000000456de2 in runtime.(*mcache).nextFree.func1 () at /usr/local/go/src/runtime/malloc.go:557
#11 0x000000000045a099 in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:344
#12 0x00000000004304e0 in ?? () at /usr/local/go/src/runtime/proc.go:1070
#13 0x000000c42003ec00 in ?? ()
#14 0x0000000000000000 in ?? ()

Thread 32 (LWP 12262):
#0  runtime.futex () at /usr/local/go/src/runtime/sys_linux_amd64.s:439
#1  0x00000000004293f2 in runtime.futexsleep (addr=0x1b13d20 <runtime.mheap_>, val=2, ns=-1)
    at /usr/local/go/src/runtime/os_linux.go:45
#2  0x000000000040f721 in runtime.lock (l=0x1b13d20 <runtime.mheap_>) at /usr/local/go/src/runtime/lock_futex.go:102
#3  0x00000000004222ff in runtime.(*mheap).alloc_m (h=0x1b13d20 <runtime.mheap_>, npage=1, spanclass=10 '\n', large=false, 
    ~r3=0xc6f346b8c0) at /usr/local/go/src/runtime/mheap.go:639
#4  0x0000000000457ecd in runtime.(*mheap).alloc.func1 () at /usr/local/go/src/runtime/mheap.go:733
#5  0x000000000045a0cb in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:360
#6  0x00000000004226e1 in runtime.(*mheap).alloc (h=0x1b13d20 <runtime.mheap_>, npage=1, spanclass=10 '\n', large=false, 
    needzero=true, ~r4=0xc420048600) at /usr/local/go/src/runtime/mheap.go:732
#7  0x0000000000415234 in runtime.(*mcentral).grow (c=0x1b152f0 <runtime.mheap_+5584>, ~r0=0x0)
    at /usr/local/go/src/runtime/mcentral.go:232
#8  0x0000000000414d9a in runtime.(*mcentral).cacheSpan (c=0x1b152f0 <runtime.mheap_+5584>, ~r0=0x7f38f4e85868)
    at /usr/local/go/src/runtime/mcentral.go:106
---Type <return> to continue, or q <return> to quit---
#9  0x00000000004148f4 in runtime.(*mcache).refill (c=0x7f38ff0bd1e0, spc=10 '\n', ~r1=0x7f38f4e85868)
    at /usr/local/go/src/runtime/mcache.go:123
#10 0x0000000000456de2 in runtime.(*mcache).nextFree.func1 () at /usr/local/go/src/runtime/malloc.go:557
#11 0x000000000045a099 in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:344
#12 0x00000000004304e0 in ?? () at /usr/local/go/src/runtime/proc.go:1070
#13 0x000000c42003d900 in ?? ()
#14 0x0000000000000000 in ?? ()

Thread 31 (LWP 12261):
#0  runtime.futex () at /usr/local/go/src/runtime/sys_linux_amd64.s:439
#1  0x00000000004293f2 in runtime.futexsleep (addr=0x1b13d20 <runtime.mheap_>, val=2, ns=-1)
    at /usr/local/go/src/runtime/os_linux.go:45
#2  0x000000000040f721 in runtime.lock (l=0x1b13d20 <runtime.mheap_>) at /usr/local/go/src/runtime/lock_futex.go:102
#3  0x00000000004222ff in runtime.(*mheap).alloc_m (h=0x1b13d20 <runtime.mheap_>, npage=1, spanclass=12 '\f', large=false, 
    ~r3=0xc54f8614a0) at /usr/local/go/src/runtime/mheap.go:639
#4  0x0000000000457ecd in runtime.(*mheap).alloc.func1 () at /usr/local/go/src/runtime/mheap.go:733
#5  0x000000000045a0cb in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:360
#6  0x00000000004226e1 in runtime.(*mheap).alloc (h=0x1b13d20 <runtime.mheap_>, npage=1, spanclass=12 '\f', large=false, 
    needzero=true, ~r4=0xc42003d900) at /usr/local/go/src/runtime/mheap.go:732
#7  0x0000000000415234 in runtime.(*mcentral).grow (c=0x1b15370 <runtime.mheap_+5712>, ~r0=0x0)
    at /usr/local/go/src/runtime/mcentral.go:232
#8  0x0000000000414d9a in runtime.(*mcentral).cacheSpan (c=0x1b15370 <runtime.mheap_+5712>, ~r0=0x7f38fe72a958)
    at /usr/local/go/src/runtime/mcentral.go:106
#9  0x00000000004148f4 in runtime.(*mcache).refill (c=0x7f38ff0b8b18, spc=12 '\f', ~r1=0x7f38fe72a958)
    at /usr/local/go/src/runtime/mcache.go:123
#10 0x0000000000456de2 in runtime.(*mcache).nextFree.func1 () at /usr/local/go/src/runtime/malloc.go:557
#11 0x000000000045a099 in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:344
#12 0x00000000004304e0 in ?? () at /usr/local/go/src/runtime/proc.go:1070
#13 0x000000c42003b300 in ?? ()
---Type <return> to continue, or q <return> to quit---
#14 0x0000000000000000 in ?? ()

Thread 30 (LWP 12260):
#0  runtime.futex () at /usr/local/go/src/runtime/sys_linux_amd64.s:439
#1  0x00000000004293f2 in runtime.futexsleep (addr=0xc420257290, val=0, ns=-1) at /usr/local/go/src/runtime/os_linux.go:45
#2  0x000000000040f9ab in runtime.notesleep (n=0xc420257290) at /usr/local/go/src/runtime/lock_futex.go:151
#3  0x00000000004315f5 in runtime.stopm () at /usr/local/go/src/runtime/proc.go:1680
#4  0x00000000004327d2 in runtime.findrunnable (gp=0x22, inheritTime=false) at /usr/local/go/src/runtime/proc.go:2135
#5  0x000000000043328c in runtime.schedule () at /usr/local/go/src/runtime/proc.go:2255
#6  0x00000000004335a6 in runtime.park_m (gp=0xce1b6af080) at /usr/local/go/src/runtime/proc.go:2318
#7  0x0000000000459ffb in runtime.mcall () at /usr/local/go/src/runtime/asm_amd64.s:286
#8  0x000000c4207e2f38 in ?? ()
#9  0x0000000000000000 in ?? ()

Thread 29 (LWP 12259):
#0  runtime.futex () at /usr/local/go/src/runtime/sys_linux_amd64.s:439
#1  0x00000000004293f2 in runtime.futexsleep (addr=0x1b13d20 <runtime.mheap_>, val=2, ns=-1)
    at /usr/local/go/src/runtime/os_linux.go:45
#2  0x000000000040f721 in runtime.lock (l=0x1b13d20 <runtime.mheap_>) at /usr/local/go/src/runtime/lock_futex.go:102
#3  0x00000000004222ff in runtime.(*mheap).alloc_m (h=0x1b13d20 <runtime.mheap_>, npage=1, spanclass=12 '\f', large=false, 
    ~r3=0x436d1b <runtime.acquirep+43>) at /usr/local/go/src/runtime/mheap.go:639
#4  0x0000000000457ecd in runtime.(*mheap).alloc.func1 () at /usr/local/go/src/runtime/mheap.go:733
#5  0x000000000045a0cb in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:360
#6  0x00000000004226e1 in runtime.(*mheap).alloc (h=0x1b13d20 <runtime.mheap_>, npage=1, spanclass=12 '\f', large=false, 
    needzero=true, ~r4=0xc42002cc00) at /usr/local/go/src/runtime/mheap.go:732
#7  0x0000000000415234 in runtime.(*mcentral).grow (c=0x1b15370 <runtime.mheap_+5712>, ~r0=0x0)
    at /usr/local/go/src/runtime/mcentral.go:232
#8  0x0000000000414d9a in runtime.(*mcentral).cacheSpan (c=0x1b15370 <runtime.mheap_+5712>, ~r0=0x7f38eda97008)
    at /usr/local/go/src/runtime/mcentral.go:106
---Type <return> to continue, or q <return> to quit---
#9  0x00000000004148f4 in runtime.(*mcache).refill (c=0x7f38ff0bfa90, spc=12 '\f', ~r1=0x7f38eda97008)
    at /usr/local/go/src/runtime/mcache.go:123
#10 0x0000000000456de2 in runtime.(*mcache).nextFree.func1 () at /usr/local/go/src/runtime/malloc.go:557
#11 0x000000000045a099 in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:344
#12 0x00000000004304e0 in ?? () at /usr/local/go/src/runtime/proc.go:1070
#13 0x000000c4204133b8 in ?? ()
#14 0x0000000000000000 in ?? ()

Thread 28 (LWP 12258):
#0  runtime.futex () at /usr/local/go/src/runtime/sys_linux_amd64.s:439
#1  0x00000000004293f2 in runtime.futexsleep (addr=0x1b13d20 <runtime.mheap_>, val=2, ns=-1)
    at /usr/local/go/src/runtime/os_linux.go:45
#2  0x000000000040f721 in runtime.lock (l=0x1b13d20 <runtime.mheap_>) at /usr/local/go/src/runtime/lock_futex.go:102
#3  0x00000000004222ff in runtime.(*mheap).alloc_m (h=0x1b13d20 <runtime.mheap_>, npage=4, spanclass=133 '\205', large=false, 
    ~r3=0xc42072fe70) at /usr/local/go/src/runtime/mheap.go:639
#4  0x0000000000457ecd in runtime.(*mheap).alloc.func1 () at /usr/local/go/src/runtime/mheap.go:733
#5  0x000000000045a0cb in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:360
#6  0x00000000004226e1 in runtime.(*mheap).alloc (h=0x1b13d20 <runtime.mheap_>, npage=4, spanclass=133 '\205', large=false, 
    needzero=true, ~r4=0x459f52 <runtime.gogo+50>) at /usr/local/go/src/runtime/mheap.go:732
#7  0x0000000000415234 in runtime.(*mcentral).grow (c=0x1b171b0 <runtime.mheap_+13456>, ~r0=0x0)
    at /usr/local/go/src/runtime/mcentral.go:232
#8  0x0000000000414d9a in runtime.(*mcentral).cacheSpan (c=0x1b171b0 <runtime.mheap_+13456>, ~r0=0xc420000180)
    at /usr/local/go/src/runtime/mcentral.go:106
#9  0x00000000004148f4 in runtime.(*mcache).refill (c=0x7f38ff0ba638, spc=133 '\205', ~r1=0xc42070e780)
    at /usr/local/go/src/runtime/mcache.go:123
#10 0x0000000000456de2 in runtime.(*mcache).nextFree.func1 () at /usr/local/go/src/runtime/malloc.go:557
#11 0x000000000045a099 in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:344
#12 0x00000000004304e0 in ?? () at /usr/local/go/src/runtime/proc.go:1070
#13 0x000000c420038c00 in ?? ()
---Type <return> to continue, or q <return> to quit---
#14 0x0000000000000000 in ?? ()

Thread 27 (LWP 12257):
#0  runtime.futex () at /usr/local/go/src/runtime/sys_linux_amd64.s:439
#1  0x00000000004293f2 in runtime.futexsleep (addr=0x1b13d20 <runtime.mheap_>, val=2, ns=-1)
    at /usr/local/go/src/runtime/os_linux.go:45
#2  0x000000000040f721 in runtime.lock (l=0x1b13d20 <runtime.mheap_>) at /usr/local/go/src/runtime/lock_futex.go:102
#3  0x00000000004222ff in runtime.(*mheap).alloc_m (h=0x1b13d20 <runtime.mheap_>, npage=1, spanclass=12 '\f', large=false, 
    ~r3=0x436d1b <runtime.acquirep+43>) at /usr/local/go/src/runtime/mheap.go:639
#4  0x0000000000457ecd in runtime.(*mheap).alloc.func1 () at /usr/local/go/src/runtime/mheap.go:733
#5  0x000000000045a0cb in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:360
#6  0x00000000004226e1 in runtime.(*mheap).alloc (h=0x1b13d20 <runtime.mheap_>, npage=1, spanclass=12 '\f', large=false, 
    needzero=true, ~r4=0x12001f900) at /usr/local/go/src/runtime/mheap.go:732
#7  0x0000000000415234 in runtime.(*mcentral).grow (c=0x1b15370 <runtime.mheap_+5712>, ~r0=0x0)
    at /usr/local/go/src/runtime/mcentral.go:232
#8  0x0000000000414d9a in runtime.(*mcentral).cacheSpan (c=0x1b15370 <runtime.mheap_+5712>, ~r0=0x7f38f72ef010)
    at /usr/local/go/src/runtime/mcentral.go:106
#9  0x00000000004148f4 in runtime.(*mcache).refill (c=0x7f38ff0bba90, spc=12 '\f', ~r1=0x7f38f72ef010)
    at /usr/local/go/src/runtime/mcache.go:123
#10 0x0000000000456de2 in runtime.(*mcache).nextFree.func1 () at /usr/local/go/src/runtime/malloc.go:557
#11 0x000000000045a099 in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:344
#12 0x00000000004304e0 in ?? () at /usr/local/go/src/runtime/proc.go:1070
#13 0x000000c420037900 in ?? ()
#14 0x0000000000000000 in ?? ()

Thread 26 (LWP 12256):
#0  runtime.futex () at /usr/local/go/src/runtime/sys_linux_amd64.s:439
#1  0x00000000004293f2 in runtime.futexsleep (addr=0x1b13d20 <runtime.mheap_>, val=2, ns=-1)
    at /usr/local/go/src/runtime/os_linux.go:45
---Type <return> to continue, or q <return> to quit---
#2  0x000000000040f721 in runtime.lock (l=0x1b13d20 <runtime.mheap_>) at /usr/local/go/src/runtime/lock_futex.go:102
#3  0x00000000004222ff in runtime.(*mheap).alloc_m (h=0x1b13d20 <runtime.mheap_>, npage=4, spanclass=133 '\205', large=false, 
    ~r3=0x436d1b <runtime.acquirep+43>) at /usr/local/go/src/runtime/mheap.go:639
#4  0x0000000000457ecd in runtime.(*mheap).alloc.func1 () at /usr/local/go/src/runtime/mheap.go:733
#5  0x000000000045a0cb in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:360
#6  0x00000000004226e1 in runtime.(*mheap).alloc (h=0x1b13d20 <runtime.mheap_>, npage=4, spanclass=133 '\205', large=false, 
    needzero=true, ~r4=0x459f52 <runtime.gogo+50>) at /usr/local/go/src/runtime/mheap.go:732
#7  0x0000000000415234 in runtime.(*mcentral).grow (c=0x1b171b0 <runtime.mheap_+13456>, ~r0=0x0)
    at /usr/local/go/src/runtime/mcentral.go:232
#8  0x0000000000414d9a in runtime.(*mcentral).cacheSpan (c=0x1b171b0 <runtime.mheap_+13456>, ~r0=0xc420000180)
    at /usr/local/go/src/runtime/mcentral.go:106
#9  0x00000000004148f4 in runtime.(*mcache).refill (c=0x7f38ff0b0450, spc=133 '\205', ~r1=0xc42070e180)
    at /usr/local/go/src/runtime/mcache.go:123
#10 0x0000000000456de2 in runtime.(*mcache).nextFree.func1 () at /usr/local/go/src/runtime/malloc.go:557
#11 0x000000000045a099 in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:344
#12 0x00000000004304e0 in ?? () at /usr/local/go/src/runtime/proc.go:1070
#13 0x000000c420036600 in ?? ()
#14 0x0000000000000000 in ?? ()

Thread 25 (LWP 12255):
#0  runtime.futex () at /usr/local/go/src/runtime/sys_linux_amd64.s:439
#1  0x00000000004293f2 in runtime.futexsleep (addr=0x1b13d20 <runtime.mheap_>, val=2, ns=-1)
    at /usr/local/go/src/runtime/os_linux.go:45
#2  0x000000000040f721 in runtime.lock (l=0x1b13d20 <runtime.mheap_>) at /usr/local/go/src/runtime/lock_futex.go:102
#3  0x00000000004222ff in runtime.(*mheap).alloc_m (h=0x1b13d20 <runtime.mheap_>, npage=1, spanclass=12 '\f', large=false, 
    ~r3=0xc4202f6600) at /usr/local/go/src/runtime/mheap.go:639
#4  0x0000000000457ecd in runtime.(*mheap).alloc.func1 () at /usr/local/go/src/runtime/mheap.go:733
#5  0x000000000045a0cb in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:360
#6  0x00000000004226e1 in runtime.(*mheap).alloc (h=0x1b13d20 <runtime.mheap_>, npage=1, spanclass=12 '\f', large=false, 
---Type <return> to continue, or q <return> to quit---
    needzero=true, ~r4=0x4317b1 <runtime.startm+225>) at /usr/local/go/src/runtime/mheap.go:732
#7  0x0000000000415234 in runtime.(*mcentral).grow (c=0x1b15370 <runtime.mheap_+5712>, ~r0=0x0)
    at /usr/local/go/src/runtime/mcentral.go:232
#8  0x0000000000414d9a in runtime.(*mcentral).cacheSpan (c=0x1b15370 <runtime.mheap_+5712>, ~r0=0x7f38bca57b60)
    at /usr/local/go/src/runtime/mcentral.go:106
#9  0x00000000004148f4 in runtime.(*mcache).refill (c=0x7f38ff0c11e0, spc=12 '\f', ~r1=0x7f38bca57b60)
    at /usr/local/go/src/runtime/mcache.go:123
#10 0x0000000000456de2 in runtime.(*mcache).nextFree.func1 () at /usr/local/go/src/runtime/malloc.go:557
#11 0x000000000045a099 in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:344
#12 0x00000000004304e0 in ?? () at /usr/local/go/src/runtime/proc.go:1070
#13 0x000000c420035300 in ?? ()
#14 0x0000000000000000 in ?? ()

Thread 24 (LWP 12254):
#0  runtime.futex () at /usr/local/go/src/runtime/sys_linux_amd64.s:439
#1  0x00000000004293f2 in runtime.futexsleep (addr=0xc42014c490, val=0, ns=-1) at /usr/local/go/src/runtime/os_linux.go:45
#2  0x000000000040f9ab in runtime.notesleep (n=0xc42014c490) at /usr/local/go/src/runtime/lock_futex.go:151
#3  0x0000000000431cfc in runtime.stoplockedm () at /usr/local/go/src/runtime/proc.go:1827
#4  0x000000000043342f in runtime.schedule () at /usr/local/go/src/runtime/proc.go:2213
#5  0x00000000004335a6 in runtime.park_m (gp=0xc42094c900) at /usr/local/go/src/runtime/proc.go:2318
#6  0x0000000000459ffb in runtime.mcall () at /usr/local/go/src/runtime/asm_amd64.s:286
#7  0x000000c420034000 in ?? ()
#8  0x0000000000000000 in ?? ()

Thread 23 (LWP 12253):
#0  runtime.futex () at /usr/local/go/src/runtime/sys_linux_amd64.s:439
#1  0x00000000004293f2 in runtime.futexsleep (addr=0x1b13d20 <runtime.mheap_>, val=2, ns=-1)
    at /usr/local/go/src/runtime/os_linux.go:45
#2  0x000000000040f721 in runtime.lock (l=0x1b13d20 <runtime.mheap_>) at /usr/local/go/src/runtime/lock_futex.go:102
---Type <return> to continue, or q <return> to quit---
#3  0x00000000004222ff in runtime.(*mheap).alloc_m (h=0x1b13d20 <runtime.mheap_>, npage=2, spanclass=117 'u', large=false, 
    ~r3=0xc420689e70) at /usr/local/go/src/runtime/mheap.go:639
#4  0x0000000000457ecd in runtime.(*mheap).alloc.func1 () at /usr/local/go/src/runtime/mheap.go:733
#5  0x000000000045a0cb in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:360
#6  0x00000000004226e1 in runtime.(*mheap).alloc (h=0x1b13d20 <runtime.mheap_>, npage=2, spanclass=117 'u', large=false, 
    needzero=true, ~r4=0x4317b1 <runtime.startm+225>) at /usr/local/go/src/runtime/mheap.go:732
#7  0x0000000000415234 in runtime.(*mcentral).grow (c=0x1b16db0 <runtime.mheap_+12432>, ~r0=0x0)
    at /usr/local/go/src/runtime/mcentral.go:232
#8  0x0000000000414d9a in runtime.(*mcentral).cacheSpan (c=0x1b16db0 <runtime.mheap_+12432>, ~r0=0xc9bbdd9080)
    at /usr/local/go/src/runtime/mcentral.go:106
#9  0x00000000004148f4 in runtime.(*mcache).refill (c=0x7f38ff0a3f78, spc=117 'u', ~r1=0xc85aca1b01)
    at /usr/local/go/src/runtime/mcache.go:123
#10 0x0000000000456de2 in runtime.(*mcache).nextFree.func1 () at /usr/local/go/src/runtime/malloc.go:557
#11 0x000000000045a099 in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:344
#12 0x00000000004304e0 in ?? () at /usr/local/go/src/runtime/proc.go:1070
#13 0x000000c4204bd0b8 in ?? ()
#14 0x0000000000000000 in ?? ()

Thread 22 (LWP 12252):
#0  runtime.futex () at /usr/local/go/src/runtime/sys_linux_amd64.s:439
#1  0x00000000004293f2 in runtime.futexsleep (addr=0x1b13d20 <runtime.mheap_>, val=2, ns=-1)
    at /usr/local/go/src/runtime/os_linux.go:45
#2  0x000000000040f721 in runtime.lock (l=0x1b13d20 <runtime.mheap_>) at /usr/local/go/src/runtime/lock_futex.go:102
#3  0x00000000004222ff in runtime.(*mheap).alloc_m (h=0x1b13d20 <runtime.mheap_>, npage=1, spanclass=12 '\f', large=false, ~r3=0x0)
    at /usr/local/go/src/runtime/mheap.go:639
#4  0x0000000000457ecd in runtime.(*mheap).alloc.func1 () at /usr/local/go/src/runtime/mheap.go:733
#5  0x000000000045a0cb in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:360
#6  0x00000000004226e1 in runtime.(*mheap).alloc (h=0x1b13d20 <runtime.mheap_>, npage=1, spanclass=12 '\f', large=false, 
    needzero=true, ~r4=0xc42041ff08) at /usr/local/go/src/runtime/mheap.go:732
---Type <return> to continue, or q <return> to quit---
#7  0x0000000000415234 in runtime.(*mcentral).grow (c=0x1b15370 <runtime.mheap_+5712>, ~r0=0x0)
    at /usr/local/go/src/runtime/mcentral.go:232
#8  0x0000000000414d9a in runtime.(*mcentral).cacheSpan (c=0x1b15370 <runtime.mheap_+5712>, ~r0=0x7f38f02851c8)
    at /usr/local/go/src/runtime/mcentral.go:106
#9  0x00000000004148f4 in runtime.(*mcache).refill (c=0x7f38ff0bed00, spc=12 '\f', ~r1=0x7f38f02851c8)
    at /usr/local/go/src/runtime/mcache.go:123
#10 0x0000000000456de2 in runtime.(*mcache).nextFree.func1 () at /usr/local/go/src/runtime/malloc.go:557
#11 0x000000000045a099 in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:344
#12 0x00000000004304e0 in ?? () at /usr/local/go/src/runtime/proc.go:1070
#13 0x000000c420412938 in ?? ()
#14 0x0000000000000000 in ?? ()

Thread 21 (LWP 12251):
#0  runtime.futex () at /usr/local/go/src/runtime/sys_linux_amd64.s:439
#1  0x00000000004293f2 in runtime.futexsleep (addr=0xc42038c490, val=0, ns=-1) at /usr/local/go/src/runtime/os_linux.go:45
#2  0x000000000040f9ab in runtime.notesleep (n=0xc42038c490) at /usr/local/go/src/runtime/lock_futex.go:151
#3  0x00000000004315f5 in runtime.stopm () at /usr/local/go/src/runtime/proc.go:1680
#4  0x00000000004327d2 in runtime.findrunnable (gp=0xc420465680, inheritTime=false) at /usr/local/go/src/runtime/proc.go:2135
#5  0x000000000043328c in runtime.schedule () at /usr/local/go/src/runtime/proc.go:2255
#6  0x00000000004335a6 in runtime.park_m (gp=0xca01842780) at /usr/local/go/src/runtime/proc.go:2318
#7  0x0000000000459ffb in runtime.mcall () at /usr/local/go/src/runtime/asm_amd64.s:286
#8  0x000000c42002f300 in ?? ()
#9  0x0000000000000000 in ?? ()

Thread 20 (LWP 12250):
#0  runtime.futex () at /usr/local/go/src/runtime/sys_linux_amd64.s:439
#1  0x00000000004293f2 in runtime.futexsleep (addr=0x1b13d20 <runtime.mheap_>, val=2, ns=-1)
    at /usr/local/go/src/runtime/os_linux.go:45
#2  0x000000000040f721 in runtime.lock (l=0x1b13d20 <runtime.mheap_>) at /usr/local/go/src/runtime/lock_futex.go:102
---Type <return> to continue, or q <return> to quit---
#3  0x00000000004222ff in runtime.(*mheap).alloc_m (h=0x1b13d20 <runtime.mheap_>, npage=1, spanclass=10 '\n', large=false, 
    ~r3=0x433121 <runtime.injectglist+353>) at /usr/local/go/src/runtime/mheap.go:639
#4  0x0000000000457ecd in runtime.(*mheap).alloc.func1 () at /usr/local/go/src/runtime/mheap.go:733
#5  0x000000000045a0cb in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:360
#6  0x00000000004226e1 in runtime.(*mheap).alloc (h=0x1b13d20 <runtime.mheap_>, npage=1, spanclass=10 '\n', large=false, 
    needzero=true, ~r4=0x12004f900) at /usr/local/go/src/runtime/mheap.go:732
#7  0x0000000000415234 in runtime.(*mcentral).grow (c=0x1b152f0 <runtime.mheap_+5584>, ~r0=0x0)
    at /usr/local/go/src/runtime/mcentral.go:232
#8  0x0000000000414d9a in runtime.(*mcentral).cacheSpan (c=0x1b152f0 <runtime.mheap_+5584>, ~r0=0x7f38c00d0270)
    at /usr/local/go/src/runtime/mcentral.go:106
#9  0x00000000004148f4 in runtime.(*mcache).refill (c=0x7f38ff0c0450, spc=10 '\n', ~r1=0x7f38c00d0270)
    at /usr/local/go/src/runtime/mcache.go:123
#10 0x0000000000456de2 in runtime.(*mcache).nextFree.func1 () at /usr/local/go/src/runtime/malloc.go:557
#11 0x000000000045a099 in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:344
#12 0x00000000004304e0 in ?? () at /usr/local/go/src/runtime/proc.go:1070
#13 0x000000c42002e000 in ?? ()
#14 0x0000000000000000 in ?? ()

Thread 19 (LWP 12249):
#0  runtime.futex () at /usr/local/go/src/runtime/sys_linux_amd64.s:439
#1  0x00000000004293f2 in runtime.futexsleep (addr=0x1b13d20 <runtime.mheap_>, val=2, ns=-1)
    at /usr/local/go/src/runtime/os_linux.go:45
#2  0x000000000040f721 in runtime.lock (l=0x1b13d20 <runtime.mheap_>) at /usr/local/go/src/runtime/lock_futex.go:102
#3  0x00000000004222ff in runtime.(*mheap).alloc_m (h=0x1b13d20 <runtime.mheap_>, npage=4, spanclass=133 '\205', large=false, 
    ~r3=0x0) at /usr/local/go/src/runtime/mheap.go:639
#4  0x0000000000457ecd in runtime.(*mheap).alloc.func1 () at /usr/local/go/src/runtime/mheap.go:733
#5  0x000000000045a0cb in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:360
#6  0x00000000004226e1 in runtime.(*mheap).alloc (h=0x1b13d20 <runtime.mheap_>, npage=4, spanclass=133 '\205', large=false, 
    needzero=true, ~r4=0x459f52 <runtime.gogo+50>) at /usr/local/go/src/runtime/mheap.go:732
---Type <return> to continue, or q <return> to quit---
#7  0x0000000000415234 in runtime.(*mcentral).grow (c=0x1b171b0 <runtime.mheap_+13456>, ~r0=0x0)
    at /usr/local/go/src/runtime/mcentral.go:232
#8  0x0000000000414d9a in runtime.(*mcentral).cacheSpan (c=0x1b171b0 <runtime.mheap_+13456>, ~r0=0xc4236aaf58)
    at /usr/local/go/src/runtime/mcentral.go:106
#9  0x00000000004148f4 in runtime.(*mcache).refill (c=0x7f38ff0b2d00, spc=133 '\205', ~r1=0xc4204bca80)
    at /usr/local/go/src/runtime/mcache.go:123
#10 0x0000000000456de2 in runtime.(*mcache).nextFree.func1 () at /usr/local/go/src/runtime/malloc.go:557
#11 0x000000000045a099 in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:344
#12 0x00000000004304e0 in ?? () at /usr/local/go/src/runtime/proc.go:1070
#13 0x000000c42002cc00 in ?? ()
#14 0x0000000000000000 in ?? ()

Thread 18 (LWP 12248):
#0  runtime.futex () at /usr/local/go/src/runtime/sys_linux_amd64.s:439
#1  0x00000000004293f2 in runtime.futexsleep (addr=0xc420566110, val=0, ns=-1) at /usr/local/go/src/runtime/os_linux.go:45
#2  0x000000000040f9ab in runtime.notesleep (n=0xc420566110) at /usr/local/go/src/runtime/lock_futex.go:151
#3  0x00000000004315f5 in runtime.stopm () at /usr/local/go/src/runtime/proc.go:1680
#4  0x00000000004327d2 in runtime.findrunnable (gp=0xc42622b680, inheritTime=false) at /usr/local/go/src/runtime/proc.go:2135
#5  0x000000000043328c in runtime.schedule () at /usr/local/go/src/runtime/proc.go:2255
#6  0x00000000004335a6 in runtime.park_m (gp=0xce1111b080) at /usr/local/go/src/runtime/proc.go:2318
#7  0x0000000000459ffb in runtime.mcall () at /usr/local/go/src/runtime/asm_amd64.s:286
#8  0x000000c42002b900 in ?? ()
#9  0x0000000000000000 in ?? ()

Thread 17 (LWP 12247):
#0  runtime.futex () at /usr/local/go/src/runtime/sys_linux_amd64.s:439
#1  0x00000000004293f2 in runtime.futexsleep (addr=0xc42054e110, val=0, ns=-1) at /usr/local/go/src/runtime/os_linux.go:45
#2  0x000000000040f9ab in runtime.notesleep (n=0xc42054e110) at /usr/local/go/src/runtime/lock_futex.go:151
#3  0x00000000004315f5 in runtime.stopm () at /usr/local/go/src/runtime/proc.go:1680
---Type <return> to continue, or q <return> to quit---
#4  0x00000000004327d2 in runtime.findrunnable (gp=0xc42f50d380, inheritTime=false) at /usr/local/go/src/runtime/proc.go:2135
#5  0x000000000043328c in runtime.schedule () at /usr/local/go/src/runtime/proc.go:2255
#6  0x00000000004335a6 in runtime.park_m (gp=0xc4d0925800) at /usr/local/go/src/runtime/proc.go:2318
#7  0x0000000000459ffb in runtime.mcall () at /usr/local/go/src/runtime/asm_amd64.s:286
#8  0x000000c42002a600 in ?? ()
#9  0x0000000000000000 in ?? ()

Thread 16 (LWP 12246):
#0  runtime.futex () at /usr/local/go/src/runtime/sys_linux_amd64.s:439
#1  0x00000000004293f2 in runtime.futexsleep (addr=0x1b13d20 <runtime.mheap_>, val=2, ns=-1)
    at /usr/local/go/src/runtime/os_linux.go:45
#2  0x000000000040f721 in runtime.lock (l=0x1b13d20 <runtime.mheap_>) at /usr/local/go/src/runtime/lock_futex.go:102
#3  0x00000000004222ff in runtime.(*mheap).alloc_m (h=0x1b13d20 <runtime.mheap_>, npage=4, spanclass=133 '\205', large=false, 
    ~r3=0xc42abcfd40) at /usr/local/go/src/runtime/mheap.go:639
#4  0x0000000000457ecd in runtime.(*mheap).alloc.func1 () at /usr/local/go/src/runtime/mheap.go:733
#5  0x000000000045a0cb in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:360
#6  0x00000000004226e1 in runtime.(*mheap).alloc (h=0x1b13d20 <runtime.mheap_>, npage=4, spanclass=133 '\205', large=false, 
    needzero=true, ~r4=0x459f52 <runtime.gogo+50>) at /usr/local/go/src/runtime/mheap.go:732
#7  0x0000000000415234 in runtime.(*mcentral).grow (c=0x1b171b0 <runtime.mheap_+13456>, ~r0=0x0)
    at /usr/local/go/src/runtime/mcentral.go:232
#8  0x0000000000414d9a in runtime.(*mcentral).cacheSpan (c=0x1b171b0 <runtime.mheap_+13456>, ~r0=0xc420000180)
    at /usr/local/go/src/runtime/mcentral.go:106
#9  0x00000000004148f4 in runtime.(*mcache).refill (c=0x7f38ff0b4b18, spc=133 '\205', ~r1=0xc42053e180)
    at /usr/local/go/src/runtime/mcache.go:123
#10 0x0000000000456de2 in runtime.(*mcache).nextFree.func1 () at /usr/local/go/src/runtime/malloc.go:557
#11 0x000000000045a099 in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:344
#12 0x00000000004304e0 in ?? () at /usr/local/go/src/runtime/proc.go:1070
#13 0x000000c420029300 in ?? ()
#14 0x0000000000000000 in ?? ()
---Type <return> to continue, or q <return> to quit---

Thread 15 (LWP 12245):
#0  runtime.futex () at /usr/local/go/src/runtime/sys_linux_amd64.s:439
#1  0x00000000004293f2 in runtime.futexsleep (addr=0xc420528110, val=0, ns=-1) at /usr/local/go/src/runtime/os_linux.go:45
#2  0x000000000040f9ab in runtime.notesleep (n=0xc420528110) at /usr/local/go/src/runtime/lock_futex.go:151
#3  0x00000000004315f5 in runtime.stopm () at /usr/local/go/src/runtime/proc.go:1680
#4  0x00000000004327d2 in runtime.findrunnable (gp=0xc426be5380, inheritTime=false) at /usr/local/go/src/runtime/proc.go:2135
#5  0x000000000043328c in runtime.schedule () at /usr/local/go/src/runtime/proc.go:2255
#6  0x00000000004335a6 in runtime.park_m (gp=0xc42f747200) at /usr/local/go/src/runtime/proc.go:2318
#7  0x0000000000459ffb in runtime.mcall () at /usr/local/go/src/runtime/asm_amd64.s:286
#8  0x000000c420028000 in ?? ()
#9  0x0000000000000000 in ?? ()

Thread 14 (LWP 12244):
#0  runtime.futex () at /usr/local/go/src/runtime/sys_linux_amd64.s:439
#1  0x00000000004293f2 in runtime.futexsleep (addr=0xc42051c110, val=0, ns=-1) at /usr/local/go/src/runtime/os_linux.go:45
#2  0x000000000040f9ab in runtime.notesleep (n=0xc42051c110) at /usr/local/go/src/runtime/lock_futex.go:151
#3  0x00000000004315f5 in runtime.stopm () at /usr/local/go/src/runtime/proc.go:1680
#4  0x00000000004327d2 in runtime.findrunnable (gp=0x66, inheritTime=false) at /usr/local/go/src/runtime/proc.go:2135
#5  0x000000000043328c in runtime.schedule () at /usr/local/go/src/runtime/proc.go:2255
#6  0x00000000004335a6 in runtime.park_m (gp=0xc48aa92780) at /usr/local/go/src/runtime/proc.go:2318
#7  0x0000000000459ffb in runtime.mcall () at /usr/local/go/src/runtime/asm_amd64.s:286
#8  0x000000c420026c00 in ?? ()
#9  0x0000000000000000 in ?? ()

Thread 13 (LWP 12243):
#0  runtime.futex () at /usr/local/go/src/runtime/sys_linux_amd64.s:439
#1  0x00000000004293f2 in runtime.futexsleep (addr=0x1b13d20 <runtime.mheap_>, val=2, ns=-1)
    at /usr/local/go/src/runtime/os_linux.go:45
---Type <return> to continue, or q <return> to quit---
#2  0x000000000040f721 in runtime.lock (l=0x1b13d20 <runtime.mheap_>) at /usr/local/go/src/runtime/lock_futex.go:102
#3  0x00000000004222ff in runtime.(*mheap).alloc_m (h=0x1b13d20 <runtime.mheap_>, npage=1, spanclass=12 '\f', large=false, 
    ~r3=0xcdf66dbd40) at /usr/local/go/src/runtime/mheap.go:639
#4  0x0000000000457ecd in runtime.(*mheap).alloc.func1 () at /usr/local/go/src/runtime/mheap.go:733
#5  0x000000000045a0cb in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:360
#6  0x00000000004226e1 in runtime.(*mheap).alloc (h=0x1b13d20 <runtime.mheap_>, npage=1, spanclass=12 '\f', large=false, 
    needzero=true, ~r4=0xc420035300) at /usr/local/go/src/runtime/mheap.go:732
#7  0x0000000000415234 in runtime.(*mcentral).grow (c=0x1b15370 <runtime.mheap_+5712>, ~r0=0x0)
    at /usr/local/go/src/runtime/mcentral.go:232
#8  0x0000000000414d9a in runtime.(*mcentral).cacheSpan (c=0x1b15370 <runtime.mheap_+5712>, ~r0=0x7f38fb6ed868)
    at /usr/local/go/src/runtime/mcentral.go:106
#9  0x00000000004148f4 in runtime.(*mcache).refill (c=0x7f38ff0b6d00, spc=12 '\f', ~r1=0x7f38fb6ed868)
    at /usr/local/go/src/runtime/mcache.go:123
#10 0x0000000000456de2 in runtime.(*mcache).nextFree.func1 () at /usr/local/go/src/runtime/malloc.go:557
#11 0x000000000045a099 in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:344
#12 0x00000000004304e0 in ?? () at /usr/local/go/src/runtime/proc.go:1070
#13 0x000000c420025900 in ?? ()
#14 0x0000000000000000 in ?? ()

Thread 12 (LWP 12242):
#0  runtime.futex () at /usr/local/go/src/runtime/sys_linux_amd64.s:439
#1  0x00000000004293f2 in runtime.futexsleep (addr=0x1b13d20 <runtime.mheap_>, val=2, ns=-1)
    at /usr/local/go/src/runtime/os_linux.go:45
#2  0x000000000040f721 in runtime.lock (l=0x1b13d20 <runtime.mheap_>) at /usr/local/go/src/runtime/lock_futex.go:102
#3  0x00000000004222ff in runtime.(*mheap).alloc_m (h=0x1b13d20 <runtime.mheap_>, npage=1, spanclass=12 '\f', large=false, 
    ~r3=0x436d1b <runtime.acquirep+43>) at /usr/local/go/src/runtime/mheap.go:639
#4  0x0000000000457ecd in runtime.(*mheap).alloc.func1 () at /usr/local/go/src/runtime/mheap.go:733
#5  0x000000000045a0cb in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:360
#6  0x00000000004226e1 in runtime.(*mheap).alloc (h=0x1b13d20 <runtime.mheap_>, npage=1, spanclass=12 '\f', large=false, 
---Type <return> to continue, or q <return> to quit---
    needzero=true, ~r4=0xc420038c00) at /usr/local/go/src/runtime/mheap.go:732
#7  0x0000000000415234 in runtime.(*mcentral).grow (c=0x1b15370 <runtime.mheap_+5712>, ~r0=0x0)
    at /usr/local/go/src/runtime/mcentral.go:232
#8  0x0000000000414d9a in runtime.(*mcentral).cacheSpan (c=0x1b15370 <runtime.mheap_+5712>, ~r0=0x7f38c44fe0a0)
    at /usr/local/go/src/runtime/mcentral.go:106
#9  0x00000000004148f4 in runtime.(*mcache).refill (c=0x7f38ff0b18a8, spc=12 '\f', ~r1=0x7f38c44fe0a0)
    at /usr/local/go/src/runtime/mcache.go:123
#10 0x0000000000456de2 in runtime.(*mcache).nextFree.func1 () at /usr/local/go/src/runtime/malloc.go:557
#11 0x000000000045a099 in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:344
#12 0x00000000004304e0 in ?? () at /usr/local/go/src/runtime/proc.go:1070
#13 0x000000c420024600 in ?? ()
#14 0x0000000000000000 in ?? ()

Thread 11 (LWP 12241):
#0  runtime.futex () at /usr/local/go/src/runtime/sys_linux_amd64.s:439
#1  0x00000000004293f2 in runtime.futexsleep (addr=0x1b13d20 <runtime.mheap_>, val=2, ns=-1)
    at /usr/local/go/src/runtime/os_linux.go:45
#2  0x000000000040f721 in runtime.lock (l=0x1b13d20 <runtime.mheap_>) at /usr/local/go/src/runtime/lock_futex.go:102
#3  0x00000000004222ff in runtime.(*mheap).alloc_m (h=0x1b13d20 <runtime.mheap_>, npage=1, spanclass=10 '\n', large=false, 
    ~r3=0x436d1b <runtime.acquirep+43>) at /usr/local/go/src/runtime/mheap.go:639
#4  0x0000000000457ecd in runtime.(*mheap).alloc.func1 () at /usr/local/go/src/runtime/mheap.go:733
#5  0x000000000045a0cb in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:360
#6  0x00000000004226e1 in runtime.(*mheap).alloc (h=0x1b13d20 <runtime.mheap_>, npage=1, spanclass=10 '\n', large=false, 
    needzero=true, ~r4=0xc420052000) at /usr/local/go/src/runtime/mheap.go:732
#7  0x0000000000415234 in runtime.(*mcentral).grow (c=0x1b152f0 <runtime.mheap_+5584>, ~r0=0x0)
    at /usr/local/go/src/runtime/mcentral.go:232
#8  0x0000000000414d9a in runtime.(*mcentral).cacheSpan (c=0x1b152f0 <runtime.mheap_+5584>, ~r0=0x7f38fec4e9c8)
    at /usr/local/go/src/runtime/mcentral.go:106
#9  0x00000000004148f4 in runtime.(*mcache).refill (c=0x7f38ff0b7a90, spc=10 '\n', ~r1=0x7f38fec4e9c8)
---Type <return> to continue, or q <return> to quit---
    at /usr/local/go/src/runtime/mcache.go:123
#10 0x0000000000456de2 in runtime.(*mcache).nextFree.func1 () at /usr/local/go/src/runtime/malloc.go:557
#11 0x000000000045a099 in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:344
#12 0x00000000004304e0 in ?? () at /usr/local/go/src/runtime/proc.go:1070
#13 0x000000c4204c7e38 in ?? ()
#14 0x0000000000000000 in ?? ()

Thread 10 (LWP 12240):
#0  runtime.futex () at /usr/local/go/src/runtime/sys_linux_amd64.s:439
#1  0x00000000004293f2 in runtime.futexsleep (addr=0x1b13d20 <runtime.mheap_>, val=2, ns=-1)
    at /usr/local/go/src/runtime/os_linux.go:45
#2  0x000000000040f721 in runtime.lock (l=0x1b13d20 <runtime.mheap_>) at /usr/local/go/src/runtime/lock_futex.go:102
#3  0x00000000004222ff in runtime.(*mheap).alloc_m (h=0x1b13d20 <runtime.mheap_>, npage=4, spanclass=133 '\205', large=false, 
    ~r3=0xc49527f200) at /usr/local/go/src/runtime/mheap.go:639
#4  0x0000000000457ecd in runtime.(*mheap).alloc.func1 () at /usr/local/go/src/runtime/mheap.go:733
#5  0x000000000045a0cb in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:360
#6  0x00000000004226e1 in runtime.(*mheap).alloc (h=0x1b13d20 <runtime.mheap_>, npage=4, spanclass=133 '\205', large=false, 
    needzero=true, ~r4=0x459f52 <runtime.gogo+50>) at /usr/local/go/src/runtime/mheap.go:732
#7  0x0000000000415234 in runtime.(*mcentral).grow (c=0x1b171b0 <runtime.mheap_+13456>, ~r0=0x0)
    at /usr/local/go/src/runtime/mcentral.go:232
#8  0x0000000000414d9a in runtime.(*mcentral).cacheSpan (c=0x1b171b0 <runtime.mheap_+13456>, ~r0=0xc420000180)
    at /usr/local/go/src/runtime/mcentral.go:106
#9  0x00000000004148f4 in runtime.(*mcache).refill (c=0x7f38ff0a31e8, spc=133 '\205', ~r1=0xc42008f800)
    at /usr/local/go/src/runtime/mcache.go:123
#10 0x0000000000456de2 in runtime.(*mcache).nextFree.func1 () at /usr/local/go/src/runtime/malloc.go:557
#11 0x000000000045a099 in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:344
#12 0x00000000004304e0 in ?? () at /usr/local/go/src/runtime/proc.go:1070
#13 0x000000c420022000 in ?? ()
#14 0x0000000000000000 in ?? ()
---Type <return> to continue, or q <return> to quit---

Thread 9 (LWP 12239):
#0  runtime.futex () at /usr/local/go/src/runtime/sys_linux_amd64.s:439
#1  0x00000000004293f2 in runtime.futexsleep (addr=0xc4203bc110, val=0, ns=-1) at /usr/local/go/src/runtime/os_linux.go:45
#2  0x000000000040f9ab in runtime.notesleep (n=0xc4203bc110) at /usr/local/go/src/runtime/lock_futex.go:151
#3  0x00000000004315f5 in runtime.stopm () at /usr/local/go/src/runtime/proc.go:1680
#4  0x00000000004327d2 in runtime.findrunnable (gp=0xc425e92d80, inheritTime=false) at /usr/local/go/src/runtime/proc.go:2135
#5  0x000000000043328c in runtime.schedule () at /usr/local/go/src/runtime/proc.go:2255
#6  0x00000000004335a6 in runtime.park_m (gp=0xccb7f97b00) at /usr/local/go/src/runtime/proc.go:2318
#7  0x0000000000459ffb in runtime.mcall () at /usr/local/go/src/runtime/asm_amd64.s:286
#8  0x000000c420020c00 in ?? ()
#9  0x0000000000000000 in ?? ()

Thread 8 (LWP 12238):
#0  runtime.futex () at /usr/local/go/src/runtime/sys_linux_amd64.s:439
#1  0x00000000004293f2 in runtime.futexsleep (addr=0xc42038c110, val=0, ns=-1) at /usr/local/go/src/runtime/os_linux.go:45
#2  0x000000000040f9ab in runtime.notesleep (n=0xc42038c110) at /usr/local/go/src/runtime/lock_futex.go:151
#3  0x00000000004315f5 in runtime.stopm () at /usr/local/go/src/runtime/proc.go:1680
#4  0x00000000004327d2 in runtime.findrunnable (gp=0x3000000020, inheritTime=false) at /usr/local/go/src/runtime/proc.go:2135
#5  0x000000000043328c in runtime.schedule () at /usr/local/go/src/runtime/proc.go:2255
#6  0x00000000004337ff in runtime.goschedImpl (gp=0xc420073fa8) at /usr/local/go/src/runtime/proc.go:2333
#7  0x00000000004339f6 in runtime.gosched_m (gp=0xc420000a80) at /usr/local/go/src/runtime/proc.go:2341
#8  0x0000000000459ffb in runtime.mcall () at /usr/local/go/src/runtime/asm_amd64.s:286
#9  0x000000c42001f900 in ?? ()
#10 0x0000000000000000 in ?? ()

Thread 7 (LWP 12237):
#0  runtime.futex () at /usr/local/go/src/runtime/sys_linux_amd64.s:439
#1  0x00000000004293f2 in runtime.futexsleep (addr=0x1b13d20 <runtime.mheap_>, val=2, ns=-1)
---Type <return> to continue, or q <return> to quit---
    at /usr/local/go/src/runtime/os_linux.go:45
#2  0x000000000040f721 in runtime.lock (l=0x1b13d20 <runtime.mheap_>) at /usr/local/go/src/runtime/lock_futex.go:102
#3  0x00000000004222ff in runtime.(*mheap).alloc_m (h=0x1b13d20 <runtime.mheap_>, npage=4, spanclass=133 '\205', large=false, 
    ~r3=0x0) at /usr/local/go/src/runtime/mheap.go:639
#4  0x0000000000457ecd in runtime.(*mheap).alloc.func1 () at /usr/local/go/src/runtime/mheap.go:733
#5  0x000000000045a0cb in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:360
#6  0x00000000004226e1 in runtime.(*mheap).alloc (h=0x1b13d20 <runtime.mheap_>, npage=4, spanclass=133 '\205', large=false, 
    needzero=true, ~r4=0x459f52 <runtime.gogo+50>) at /usr/local/go/src/runtime/mheap.go:732
#7  0x0000000000415234 in runtime.(*mcentral).grow (c=0x1b171b0 <runtime.mheap_+13456>, ~r0=0x0)
    at /usr/local/go/src/runtime/mcentral.go:232
#8  0x0000000000414d9a in runtime.(*mcentral).cacheSpan (c=0x1b171b0 <runtime.mheap_+13456>, ~r0=0xc420000180)
    at /usr/local/go/src/runtime/mcentral.go:106
#9  0x00000000004148f4 in runtime.(*mcache).refill (c=0x7f38ff0b5f70, spc=133 '\205', ~r1=0xc42036a180)
    at /usr/local/go/src/runtime/mcache.go:123
#10 0x0000000000456de2 in runtime.(*mcache).nextFree.func1 () at /usr/local/go/src/runtime/malloc.go:557
#11 0x000000000045a099 in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:344
#12 0x00000000004304e0 in ?? () at /usr/local/go/src/runtime/proc.go:1070
#13 0x000000c42001c000 in ?? ()
#14 0x0000000000000000 in ?? ()

Thread 6 (LWP 12236):
#0  runtime.futex () at /usr/local/go/src/runtime/sys_linux_amd64.s:439
#1  0x00000000004293f2 in runtime.futexsleep (addr=0x1b13d20 <runtime.mheap_>, val=2, ns=-1)
    at /usr/local/go/src/runtime/os_linux.go:45
#2  0x000000000040f721 in runtime.lock (l=0x1b13d20 <runtime.mheap_>) at /usr/local/go/src/runtime/lock_futex.go:102
#3  0x00000000004222ff in runtime.(*mheap).alloc_m (h=0x1b13d20 <runtime.mheap_>, npage=1, spanclass=12 '\f', large=false, 
    ~r3=0xc43f4ef1a0) at /usr/local/go/src/runtime/mheap.go:639
#4  0x0000000000457ecd in runtime.(*mheap).alloc.func1 () at /usr/local/go/src/runtime/mheap.go:733
#5  0x000000000045a0cb in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:360
---Type <return> to continue, or q <return> to quit---
#6  0x00000000004226e1 in runtime.(*mheap).alloc (h=0x1b13d20 <runtime.mheap_>, npage=1, spanclass=12 '\f', large=false, 
    needzero=true, ~r4=0xc420034000) at /usr/local/go/src/runtime/mheap.go:732
#7  0x0000000000415234 in runtime.(*mcentral).grow (c=0x1b15370 <runtime.mheap_+5712>, ~r0=0x0)
    at /usr/local/go/src/runtime/mcentral.go:232
#8  0x0000000000414d9a in runtime.(*mcentral).cacheSpan (c=0x1b15370 <runtime.mheap_+5712>, ~r0=0x7f38fba02730)
    at /usr/local/go/src/runtime/mcentral.go:106
#9  0x00000000004148f4 in runtime.(*mcache).refill (c=0x7f38ff0b51e0, spc=12 '\f', ~r1=0x7f38fba02730)
    at /usr/local/go/src/runtime/mcache.go:123
#10 0x0000000000456de2 in runtime.(*mcache).nextFree.func1 () at /usr/local/go/src/runtime/malloc.go:557
#11 0x000000000045a099 in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:344
#12 0x00000000004304e0 in ?? () at /usr/local/go/src/runtime/proc.go:1070
#13 0x000000c42001e600 in ?? ()
#14 0x0000000000000000 in ?? ()

Thread 5 (LWP 12235):
#0  runtime.futex () at /usr/local/go/src/runtime/sys_linux_amd64.s:439
#1  0x00000000004293f2 in runtime.futexsleep (addr=0xc42008a110, val=0, ns=-1) at /usr/local/go/src/runtime/os_linux.go:45
#2  0x000000000040f9ab in runtime.notesleep (n=0xc42008a110) at /usr/local/go/src/runtime/lock_futex.go:151
#3  0x00000000004315f5 in runtime.stopm () at /usr/local/go/src/runtime/proc.go:1680
#4  0x00000000004327d2 in runtime.findrunnable (gp=0xc423c5e480, inheritTime=false) at /usr/local/go/src/runtime/proc.go:2135
#5  0x000000000043328c in runtime.schedule () at /usr/local/go/src/runtime/proc.go:2255
#6  0x00000000004335a6 in runtime.park_m (gp=0xc4fc1e6780) at /usr/local/go/src/runtime/proc.go:2318
#7  0x0000000000459ffb in runtime.mcall () at /usr/local/go/src/runtime/asm_amd64.s:286
#8  0x000000c42001e600 in ?? ()
#9  0x0000000000000000 in ?? ()

Thread 4 (LWP 12234):
#0  runtime.futex () at /usr/local/go/src/runtime/sys_linux_amd64.s:439
#1  0x00000000004293f2 in runtime.futexsleep (addr=0xc420062810, val=0, ns=-1) at /usr/local/go/src/runtime/os_linux.go:45
---Type <return> to continue, or q <return> to quit---
#2  0x000000000040f9ab in runtime.notesleep (n=0xc420062810) at /usr/local/go/src/runtime/lock_futex.go:151
#3  0x00000000004315f5 in runtime.stopm () at /usr/local/go/src/runtime/proc.go:1680
#4  0x00000000004327d2 in runtime.findrunnable (gp=0xc4276c7e00, inheritTime=false) at /usr/local/go/src/runtime/proc.go:2135
#5  0x000000000043328c in runtime.schedule () at /usr/local/go/src/runtime/proc.go:2255
#6  0x00000000004335a6 in runtime.park_m (gp=0xcd3a4b3680) at /usr/local/go/src/runtime/proc.go:2318
#7  0x0000000000459ffb in runtime.mcall () at /usr/local/go/src/runtime/asm_amd64.s:286
#8  0x000000c42001c000 in ?? ()
#9  0x0000000000000000 in ?? ()

Thread 3 (LWP 12233):
#0  runtime.futex () at /usr/local/go/src/runtime/sys_linux_amd64.s:439
#1  0x00000000004293f2 in runtime.futexsleep (addr=0x1b2bc20 <runtime.sig>, val=0, ns=-1)
    at /usr/local/go/src/runtime/os_linux.go:45
#2  0x000000000040fa96 in runtime.notetsleep_internal (n=0x1b2bc20 <runtime.sig>, ns=-1, ~r2=false)
    at /usr/local/go/src/runtime/lock_futex.go:174
#3  0x000000000040fcaa in runtime.notetsleepg (n=0x1b2bc20 <runtime.sig>, ns=-1, ~r2=false)
    at /usr/local/go/src/runtime/lock_futex.go:228
#4  0x0000000000443656 in os/signal.signal_recv (~r0=0) at /usr/local/go/src/runtime/sigqueue.go:131
#5  0x0000000000525a32 in os/signal.loop () at /usr/local/go/src/os/signal/signal_unix.go:22
#6  0x000000000045cbd1 in runtime.goexit () at /usr/local/go/src/runtime/asm_amd64.s:2337
#7  0x0000000000000000 in ?? ()

Thread 2 (LWP 12232):
#0  runtime.futex () at /usr/local/go/src/runtime/sys_linux_amd64.s:439
#1  0x00000000004293f2 in runtime.futexsleep (addr=0x1b13d20 <runtime.mheap_>, val=2, ns=-1)
    at /usr/local/go/src/runtime/os_linux.go:45
#2  0x000000000040f721 in runtime.lock (l=0x1b13d20 <runtime.mheap_>) at /usr/local/go/src/runtime/lock_futex.go:102
#3  0x0000000000414771 in runtime.allocmcache (~r0=0x0) at /usr/local/go/src/runtime/mcache.go:78
#4  0x000000000042c005 in runtime.startpanic_m () at /usr/local/go/src/runtime/panic.go:652
---Type <return> to continue, or q <return> to quit---
#5  0x000000000045a0cb in runtime.systemstack () at /usr/local/go/src/runtime/asm_amd64.s:360
#6  0x000000000042bb8e in runtime.startpanic () at /usr/local/go/src/runtime/panic.go:578
#7  0x000000000044197d in runtime.sighandler (sig=5, info=0xc42006bbf0, ctxt=0xc42006bac0, gp=0xc420000480)
    at /usr/local/go/src/runtime/signal_sighandler.go:81
#8  0x000000000044234d in runtime.sigtrampgo (sig=5, info=0xc42006bbf0, ctx=0xc42006bac0)
    at /usr/local/go/src/runtime/signal_unix.go:334
#9  0x000000000045de03 in runtime.sigtramp () at /usr/local/go/src/runtime/sys_linux_amd64.s:265
#10 0x000000000045def0 in ?? () at /usr/local/go/src/runtime/sys_linux_amd64.s:349
#11 0x0000000000000001 in ?? ()
#12 0x0000000000000000 in ?? ()

Thread 1 (LWP 12230):
#0  runtime.futex () at /usr/local/go/src/runtime/sys_linux_amd64.s:439
#1  0x00000000004293f2 in runtime.futexsleep (addr=0x1b0a950 <runtime.m0+272>, val=0, ns=-1)
    at /usr/local/go/src/runtime/os_linux.go:45
#2  0x000000000040f9ab in runtime.notesleep (n=0x1b0a950 <runtime.m0+272>) at /usr/local/go/src/runtime/lock_futex.go:151
#3  0x00000000004315f5 in runtime.stopm () at /usr/local/go/src/runtime/proc.go:1680
#4  0x00000000004327d2 in runtime.findrunnable (gp=0x45cbd1 <runtime.goexit+1>, inheritTime=false)
    at /usr/local/go/src/runtime/proc.go:2135
#5  0x000000000043328c in runtime.schedule () at /usr/local/go/src/runtime/proc.go:2255
#6  0x00000000004335a6 in runtime.park_m (gp=0xca01842780) at /usr/local/go/src/runtime/proc.go:2318
#7  0x0000000000459ffb in runtime.mcall () at /usr/local/go/src/runtime/asm_amd64.s:286
#8  0x0000000001b0a100 in ?? ()
#9  0x00007ffdc5be26e0 in ?? ()
#10 0x0000000001b0a100 in ?? ()
#11 0x00007ffdc5be26d0 in ?? ()
#12 0x0000000000430544 in runtime.mstart () at /usr/local/go/src/runtime/proc.go:1152
#13 0x0000000000459ec1 in runtime.rt0_go () at /usr/local/go/src/runtime/asm_amd64.s:186
#14 0x000000000000000a in ?? ()
---Type <return> to continue, or q <return> to quit---
#15 0x00007ffdc5be2718 in ?? ()
#16 0x000000000000000a in ?? ()
#17 0x00007ffdc5be2718 in ?? ()
#18 0x0000000000000000 in ?? ()
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[END] 2018/1/9 10:08:20
```