gistfile1.txt

dogbert@dogbert-VirtualBox ~/repos/rakudo $ ./perl6 -v
This is Rakudo version 2017.07-126-g86cb1363d built on MoarVM version 2017.07-299-g079dc9e9
implementing Perl 6.c.
dogbert@dogbert-VirtualBox ~/repos/rakudo $ for i in `seq 15`; do ./perl6 t/spec/integration/eval-and-threads.t; done 
1..1
ok 1 - Simple EVAL in a loop does not crash
1..1
=================================================================
==7501== ERROR: AddressSanitizer: heap-use-after-free on address 0xabe5227c at pc 0xb564904d bp 0x9fff1a98 sp 0x9fff1a8c
READ of size 4 at 0xabe5227c thread T3
    #0 0xb564904c in MVM_sc_get_collectable_sc /home/dogbert/repos/rakudo/nqp/MoarVM/src/6model/sc.h:77
    #1 0xb564904c in MVM_sc_get_obj_sc /home/dogbert/repos/rakudo/nqp/MoarVM/src/6model/sc.h:82
    #2 0xb564904c in MVM_interp_run /home/dogbert/repos/rakudo/nqp/MoarVM/src/core/interp.c:3109
    #3 0xb569769f in start_thread /home/dogbert/repos/rakudo/nqp/MoarVM/src/core/threads.c:81
    #4 0xb59c98f6 in uv__thread_start /home/dogbert/repos/rakudo/nqp/MoarVM/3rdparty/libuv/src/unix/thread.c:49
    #5 0xb611d9c6 (/usr/lib/i386-linux-gnu/libasan.so.0+0x1a9c6)
    #6 0xb610d2ac (/usr/lib/i386-linux-gnu/libasan.so.0+0xa2ac)
    #7 0xb52cdf71 in start_thread (/lib/i386-linux-gnu/libpthread.so.0+0x6f71)
    #8 0xb53d13ed (/lib/i386-linux-gnu/libc.so.6+0xee3ed)
0xabe5227c is located 1276 bytes inside of 1280-byte region [0xabe51d80,0xabe52280)
freed by thread T2 here:
    #0 0xb61199b4 (/usr/lib/i386-linux-gnu/libasan.so.0+0x169b4)
    #1 0xb57fd981 in MVM_realloc /home/dogbert/repos/rakudo/nqp/MoarVM/src/core/alloc.h:20
    #2 0xb57fd981 in MVM_sc_add_all_scs_entry /home/dogbert/repos/rakudo/nqp/MoarVM/src/6model/sc.c:66
    #3 0xb57fed74 in MVM_sc_create /home/dogbert/repos/rakudo/nqp/MoarVM/src/6model/sc.c:11
    #4 0xb563b603 in MVM_interp_run /home/dogbert/repos/rakudo/nqp/MoarVM/src/core/interp.c:3015
    #5 0xb569769f in start_thread /home/dogbert/repos/rakudo/nqp/MoarVM/src/core/threads.c:81
    #6 0xb59c98f6 in uv__thread_start /home/dogbert/repos/rakudo/nqp/MoarVM/3rdparty/libuv/src/unix/thread.c:49
    #7 0xb53d13ed (/lib/i386-linux-gnu/libc.so.6+0xee3ed)
previously allocated by thread T3 here:
    #0 0xb61199b4 (/usr/lib/i386-linux-gnu/libasan.so.0+0x169b4)
    #1 0xb57fd981 in MVM_realloc /home/dogbert/repos/rakudo/nqp/MoarVM/src/core/alloc.h:20
    #2 0xb57fd981 in MVM_sc_add_all_scs_entry /home/dogbert/repos/rakudo/nqp/MoarVM/src/6model/sc.c:66
    #3 0xb57fed74 in MVM_sc_create /home/dogbert/repos/rakudo/nqp/MoarVM/src/6model/sc.c:11
    #4 0xb563b603 in MVM_interp_run /home/dogbert/repos/rakudo/nqp/MoarVM/src/core/interp.c:3015
    #5 0xb569769f in start_thread /home/dogbert/repos/rakudo/nqp/MoarVM/src/core/threads.c:81
    #6 0xb59c98f6 in uv__thread_start /home/dogbert/repos/rakudo/nqp/MoarVM/3rdparty/libuv/src/unix/thread.c:49
    #7 0xb53d13ed (/lib/i386-linux-gnu/libc.so.6+0xee3ed)
Thread T3 created by T0 here:
    #0 0xb610d1d0 (/usr/lib/i386-linux-gnu/libasan.so.0+0xa1d0)
    #1 0xb59c9950 in uv_thread_create /home/dogbert/repos/rakudo/nqp/MoarVM/3rdparty/libuv/src/unix/thread.c:66
    #2 0xb560209c in MVM_interp_run /home/dogbert/repos/rakudo/nqp/MoarVM/src/core/interp.c:4035
    #3 0xb59a6dc7 in MVM_vm_run_file /home/dogbert/repos/rakudo/nqp/MoarVM/src/moar.c:349
    #4 0x8049133 in main /home/dogbert/repos/rakudo/nqp/MoarVM/src/main.c:253
    #5 0xb52fcaf2 (/lib/i386-linux-gnu/libc.so.6+0x19af2)
Thread T2 created by T0 here:
    #0 0xb610d1d0 (/usr/lib/i386-linux-gnu/libasan.so.0+0xa1d0)
    #1 0xb59c9950 in uv_thread_create /home/dogbert/repos/rakudo/nqp/MoarVM/3rdparty/libuv/src/unix/thread.c:66
    #2 0xb560209c in MVM_interp_run /home/dogbert/repos/rakudo/nqp/MoarVM/src/core/interp.c:4035
    #3 0xb59a6dc7 in MVM_vm_run_file /home/dogbert/repos/rakudo/nqp/MoarVM/src/moar.c:349
    #4 0x8049133 in main /home/dogbert/repos/rakudo/nqp/MoarVM/src/main.c:253
    #5 0xb52fcaf2 (/lib/i386-linux-gnu/libc.so.6+0x19af2)
SUMMARY: AddressSanitizer: heap-use-after-free /home/dogbert/repos/rakudo/nqp/MoarVM/src/6model/sc.h:77 MVM_sc_get_collectable_sc
Shadow bytes around the buggy address:
  0x357ca3f0: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
  0x357ca400: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
  0x357ca410: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
  0x357ca420: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
  0x357ca430: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
=>0x357ca440: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd[fd]
  0x357ca450:fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x357ca460: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x357ca470: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x357ca480: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x357ca490: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
Shadow byte legend (one shadow byte represents 8 application bytes):
  Addressable:           00
  Partially addressable: 01 02 03 04 05 06 07 
  Heap left redzone:     fa
  Heap righ redzone:     fb
  Freed Heap region:     fd
  Stack left redzone:    f1
  Stack mid redzone:     f2
  Stack right redzone:   f3
  Stack partial redzone: f4
  Stack after return:    f5
  Stack use after scope: f8
  Global redzone:        f9
  Global init order:     f6
  Poisoned by user:      f7
  ASan internal:         fe
==7501== ABORTING