gistfile1.txt

$ ./bin/packer -v
Packer v0.1.0
$ ./bin/packer build test.json
virtualbox output will be in this color.

==> virtualbox: Downloading VirtualBox guest additions. Progress will be shown periodically.
==> virtualbox: Copying or downloading ISO. Progress will be reported periodically.
panic: EOF

goroutine 41 [running]:
log.Panic(0x78efa0, 0x1, 0x1)
  /usr/local/go/src/pkg/log/log.go:307 +0xaa
github.com/mitchellh/packer/packer/rpc.func·001()
	/Users/riywo/golang/src/github.com/mitchellh/packer/packer/rpc/builder.go:73 +0x23e
created by github.com/mitchellh/packer/packer/rpc.(*builder).Run
	/Users/riywo/golang/src/github.com/mitchellh/packer/packer/rpc/builder.go:77 +0x1b0

goroutine 1 [chan receive]:
net/rpc.(*Client).Call(0xc2000d7d20, 0x2cbbf0, 0xb, 0x1e8740, 0xc200136450, ...)
	/usr/local/go/src/pkg/net/rpc/client.go:310 +0xa4
github.com/mitchellh/packer/packer/rpc.(*command).Run(0xc200000640, 0xc2000d75a0, 0xc2000d7540, 0xc200096020, 0x1, ...)
	/Users/riywo/golang/src/github.com/mitchellh/packer/packer/rpc/command.go:46 +0x154
github.com/mitchellh/packer/packer/plugin.(*cmdCommand).Run(0xc200101860, 0xc2000d75a0, 0xc2000d7540, 0xc200096020, 0x1, ...)
	/Users/riywo/golang/src/github.com/mitchellh/packer/packer/plugin/command.go:29 +0xc2
github.com/mitchellh/packer/packer.(*coreEnvironment).Cli(0xc2000d7540, 0xc200096010, 0x2, 0x2, 0x0, ...)
	/Users/riywo/golang/src/github.com/mitchellh/packer/packer/environment.go:262 +0x85d
main.main()
	/Users/riywo/Dropbox/home/github/packer/packer.go:76 +0xac4

goroutine 2 [syscall]:

goroutine 4 [syscall]:
os/signal.loop()
	/usr/local/go/src/pkg/os/signal/signal_unix.go:21 +0x1c
created by os/signal.init·1
	/usr/local/go/src/pkg/os/signal/signal_unix.go:27 +0x2f

goroutine 6 [chan receive]:
main.func·001()
	/Users/riywo/Dropbox/home/github/packer/signal.go:18 +0x46
created by main.setupSignalHandlers
	/Users/riywo/Dropbox/home/github/packer/signal.go:28 +0x115

goroutine 7 [syscall]:
syscall.Syscall()
	/usr/local/go/src/pkg/syscall/asm_darwin_amd64.s:15 +0x5
syscall.read(0x4, 0xc200134007, 0x5f9, 0x5f9, 0x7, ...)
	/usr/local/go/src/pkg/syscall/zsyscall_darwin_amd64.go:900 +0x70
syscall.Read(0x4, 0xc200134007, 0x5f9, 0x5f9, 0x17964, ...)
	/usr/local/go/src/pkg/syscall/syscall_unix.go:132 +0x5a
os.(*File).read(0xc2000004f0, 0xc200134007, 0x5f9, 0x5f9, 0xc200134000, ...)
	/usr/local/go/src/pkg/os/file_unix.go:174 +0x60
os.(*File).Read(0xc2000004f0, 0xc200134007, 0x5f9, 0x5f9, 0x7, ...)
	/usr/local/go/src/pkg/os/file.go:95 +0x96
bytes.(*Buffer).ReadFrom(0xc2000c8310, 0xc2000ff720, 0xc2000004f0, 0x7, 0x0, ...)
	/usr/local/go/src/pkg/bytes/buffer.go:169 +0x203
io.Copy(0xc2000ff840, 0xc2000c8310, 0xc2000ff720, 0xc2000004f0, 0x0, ...)
	/usr/local/go/src/pkg/io/io.go:340 +0xa3
os/exec.func·003(0x11006af8, 0x1)
	/usr/local/go/src/pkg/os/exec/exec.go:207 +0x60
os/exec.func·004(0xc200101400)
	/usr/local/go/src/pkg/os/exec/exec.go:276 +0x2a
created by os/exec.(*Cmd).Start
	/usr/local/go/src/pkg/os/exec/exec.go:277 +0x732

goroutine 8 [syscall]:
syscall.Syscall()
	/usr/local/go/src/pkg/syscall/asm_darwin_amd64.s:15 +0x5
syscall.read(0x6, 0xc2001322ae, 0x352, 0x352, 0x30, ...)
	/usr/local/go/src/pkg/syscall/zsyscall_darwin_amd64.go:900 +0x70
syscall.Read(0x6, 0xc2001322ae, 0x352, 0x352, 0x30, ...)
	/usr/local/go/src/pkg/syscall/syscall_unix.go:132 +0x5a
os.(*File).read(0xc200000510, 0xc2001322ae, 0x352, 0x352, 0x30, ...)
	/usr/local/go/src/pkg/os/file_unix.go:174 +0x60
os.(*File).Read(0xc200000510, 0xc2001322ae, 0x352, 0x352, 0x30, ...)
	/usr/local/go/src/pkg/os/file.go:95 +0x96
bytes.(*Buffer).ReadFrom(0xc2000c8380, 0xc2000ff720, 0xc200000510, 0x2ae, 0x0, ...)
	/usr/local/go/src/pkg/bytes/buffer.go:169 +0x203
io.Copy(0xc2000ff840, 0xc2000c8380, 0xc2000ff720, 0xc200000510, 0x0, ...)
	/usr/local/go/src/pkg/io/io.go:340 +0xa3
os/exec.func·003(0xc2000ba820, 0x1f9dc0)
	/usr/local/go/src/pkg/os/exec/exec.go:207 +0x60
os/exec.func·004(0xc200101440)
	/usr/local/go/src/pkg/os/exec/exec.go:276 +0x2a
created by os/exec.(*Cmd).Start
	/usr/local/go/src/pkg/os/exec/exec.go:277 +0x732

goroutine 9 [syscall]:
syscall.Syscall6()
	/usr/local/go/src/pkg/syscall/asm_darwin_amd64.s:39 +0x5
syscall.wait4(0x8135, 0xc200000540, 0x0, 0xc2000cb510, 0x100000001, ...)
	/usr/local/go/src/pkg/syscall/zsyscall_darwin_amd64.go:32 +0x7b
syscall.Wait4(0x8135, 0x679e44, 0x0, 0xc2000cb510, 0x0, ...)
	/usr/local/go/src/pkg/syscall/syscall_bsd.go:137 +0x6c
os.(*Process).wait(0xc2001016a0, 0x0, 0x0, 0x0)
	/usr/local/go/src/pkg/os/exec_unix.go:22 +0xea
os.(*Process).Wait(0xc2001016a0, 0x0, 0x0, 0x0)
	/usr/local/go/src/pkg/os/doc.go:43 +0x25
os/exec.(*Cmd).Wait(0xc2000d0280, 0x0, 0x0)
	/usr/local/go/src/pkg/os/exec/exec.go:310 +0x197
github.com/mitchellh/packer/packer/plugin.func·007()
	/Users/riywo/golang/src/github.com/mitchellh/packer/packer/plugin/client.go:243 +0x35
created by github.com/mitchellh/packer/packer/plugin.(*Client).Start
	/Users/riywo/golang/src/github.com/mitchellh/packer/packer/plugin/client.go:246 +0x734

goroutine 10 [sleep]:
time.Sleep(0x989680)
	/usr/local/go/src/pkg/runtime/ztime_darwin_amd64.c:19 +0x2f
github.com/mitchellh/packer/packer/plugin.(*Client).logStderr(0xc2000ff810, 0xc2000c8380)
	/Users/riywo/golang/src/github.com/mitchellh/packer/packer/plugin/client.go:305 +0x1e1
created by github.com/mitchellh/packer/packer/plugin.(*Client).Start
	/Users/riywo/golang/src/github.com/mitchellh/packer/packer/plugin/client.go:249 +0x75e

goroutine 12 [IO wait]:
net.runtime_pollWait(0x4fef00, 0x72, 0x0)
	/usr/local/go/src/pkg/runtime/znetpoll_darwin_amd64.c:118 +0x82
net.(*pollDesc).WaitRead(0xc200137080, 0x23, 0xc2000ff330)
	/usr/local/go/src/pkg/net/fd_poll_runtime.go:75 +0x31
net.(*netFD).Read(0xc200137000, 0xc20014a000, 0x1000, 0x1000, 0x0, ...)
	/usr/local/go/src/pkg/net/fd_unix.go:195 +0x2b3
net.(*conn).Read(0xc200000630, 0xc20014a000, 0x1000, 0x1000, 0x0, ...)
	/usr/local/go/src/pkg/net/net.go:123 +0xc3
bufio.(*Reader).fill(0xc2000d7cc0)
	/usr/local/go/src/pkg/bufio/bufio.go:79 +0x10c
bufio.(*Reader).Read(0xc2000d7cc0, 0xc2001092a0, 0x1, 0x9, 0x1, ...)
	/usr/local/go/src/pkg/bufio/bufio.go:147 +0x1b0
io.ReadAtLeast(0xc200136270, 0xc2000d7cc0, 0xc2001092a0, 0x1, 0x9, ...)
	/usr/local/go/src/pkg/io/io.go:284 +0xf7
io.ReadFull(0xc200136270, 0xc2000d7cc0, 0xc2001092a0, 0x1, 0x9, ...)
	/usr/local/go/src/pkg/io/io.go:302 +0x6f
encoding/gob.decodeUintReader(0xc200136270, 0xc2000d7cc0, 0xc2001092a0, 0x9, 0x9, ...)
	/usr/local/go/src/pkg/encoding/gob/decode.go:65 +0xaa
encoding/gob.(*Decoder).recvMessage(0xc200149000, 0x0)
	/usr/local/go/src/pkg/encoding/gob/decoder.go:73 +0x4b
encoding/gob.(*Decoder).decodeTypeSequence(0xc200149000, 0xc200136600, 0x160)
	/usr/local/go/src/pkg/encoding/gob/decoder.go:159 +0x47
encoding/gob.(*Decoder).DecodeValue(0xc200149000, 0x1e99c0, 0xc200136690, 0x160, 0x0, ...)
	/usr/local/go/src/pkg/encoding/gob/decoder.go:223 +0x101
encoding/gob.(*Decoder).Decode(0xc200149000, 0x1e99c0, 0xc200136690, 0x0, 0x0, ...)
	/usr/local/go/src/pkg/encoding/gob/decoder.go:202 +0x1c3
net/rpc.(*gobClientCodec).ReadResponseHeader(0xc2001362d0, 0xc200136690, 0x0, 0x0)
	/usr/local/go/src/pkg/net/rpc/client.go:218 +0x3d
net/rpc.(*Client).input(0xc2000d7d20)
	/usr/local/go/src/pkg/net/rpc/client.go:106 +0xba
created by net/rpc.NewClientWithCodec
	/usr/local/go/src/pkg/net/rpc/client.go:196 +0x8f

goroutine 13 [IO wait]:
net.runtime_pollWait(0x4fedc0, 0x72, 0x0)
	/usr/local/go/src/pkg/runtime/znetpoll_darwin_amd64.c:118 +0x82
net.(*pollDesc).WaitRead(0xc200137230, 0x23, 0xc2000ff330)
	/usr/local/go/src/pkg/net/fd_poll_runtime.go:75 +0x31
net.(*netFD).Read(0xc2001371b0, 0xc20015a000, 0x1000, 0x1000, 0x0, ...)
	/usr/local/go/src/pkg/net/fd_unix.go:195 +0x2b3
net.(*conn).Read(0xc200000970, 0xc20015a000, 0x1000, 0x1000, 0x0, ...)
	/usr/local/go/src/pkg/net/net.go:123 +0xc3
bufio.(*Reader).fill(0xc2000d7de0)
	/usr/local/go/src/pkg/bufio/bufio.go:79 +0x10c
bufio.(*Reader).Read(0xc2000d7de0, 0xc2001094a0, 0x1, 0x9, 0x1, ...)
	/usr/local/go/src/pkg/bufio/bufio.go:147 +0x1b0
io.ReadAtLeast(0xc200136270, 0xc2000d7de0, 0xc2001094a0, 0x1, 0x9, ...)
	/usr/local/go/src/pkg/io/io.go:284 +0xf7
io.ReadFull(0xc200136270, 0xc2000d7de0, 0xc2001094a0, 0x1, 0x9, ...)
	/usr/local/go/src/pkg/io/io.go:302 +0x6f
encoding/gob.decodeUintReader(0xc200136270, 0xc2000d7de0, 0xc2001094a0, 0x9, 0x9, ...)
	/usr/local/go/src/pkg/encoding/gob/decode.go:65 +0xaa
encoding/gob.(*Decoder).recvMessage(0xc2001490f0, 0xc20014912c)
	/usr/local/go/src/pkg/encoding/gob/decoder.go:73 +0x4b
encoding/gob.(*Decoder).decodeTypeSequence(0xc2001490f0, 0xc20015e300, 0x160)
	/usr/local/go/src/pkg/encoding/gob/decoder.go:159 +0x47
encoding/gob.(*Decoder).DecodeValue(0xc2001490f0, 0x1e9980, 0xc20015e320, 0x160, 0x0, ...)
	/usr/local/go/src/pkg/encoding/gob/decoder.go:223 +0x101
encoding/gob.(*Decoder).Decode(0xc2001490f0, 0x1e9980, 0xc20015e320, 0x0, 0x0, ...)
	/usr/local/go/src/pkg/encoding/gob/decoder.go:202 +0x1c3
net/rpc.(*gobServerCodec).ReadRequestHeader(0xc200136750, 0xc20015e320, 0xc2001f2d20, 0xec843)
	/usr/local/go/src/pkg/net/rpc/server.go:398 +0x3d
net/rpc.(*Server).readRequestHeader(0xc200138300, 0xc200138dc0, 0xc200136750, 0x0, 0x0, ...)
	/usr/local/go/src/pkg/net/rpc/server.go:549 +0x99
net/rpc.(*Server).readRequest(0xc200138300, 0xc200138dc0, 0xc200136750, 0xc20014c080, 0xc200101de0, ...)
	/usr/local/go/src/pkg/net/rpc/server.go:516 +0x9e
net/rpc.(*Server).ServeCodec(0xc200138300, 0xc200138dc0, 0xc200136750)
	/usr/local/go/src/pkg/net/rpc/server.go:435 +0x64
net/rpc.(*Server).ServeConn(0xc200138300, 0xc200138040, 0xc200000970)
	/usr/local/go/src/pkg/net/rpc/server.go:427 +0x13e
github.com/mitchellh/packer/packer/rpc.func·005()
	/Users/riywo/golang/src/github.com/mitchellh/packer/packer/rpc/server.go:84 +0xf7
created by github.com/mitchellh/packer/packer/rpc.serveSingleConn
	/Users/riywo/golang/src/github.com/mitchellh/packer/packer/rpc/server.go:85 +0xb8

goroutine 15 [syscall]:
syscall.Syscall()
	/usr/local/go/src/pkg/syscall/asm_darwin_amd64.s:15 +0x5
syscall.read(0xa, 0xc200199607, 0x5f9, 0x5f9, 0x7, ...)
	/usr/local/go/src/pkg/syscall/zsyscall_darwin_amd64.go:900 +0x70
syscall.Read(0xa, 0xc200199607, 0x5f9, 0x5f9, 0x17964, ...)
	/usr/local/go/src/pkg/syscall/syscall_unix.go:132 +0x5a
os.(*File).read(0xc200000d10, 0xc200199607, 0x5f9, 0x5f9, 0xc200199600, ...)
	/usr/local/go/src/pkg/os/file_unix.go:174 +0x60
os.(*File).Read(0xc200000d10, 0xc200199607, 0x5f9, 0x5f9, 0x7, ...)
	/usr/local/go/src/pkg/os/file.go:95 +0x96
bytes.(*Buffer).ReadFrom(0xc20014e700, 0xc2000ff720, 0xc200000d10, 0x7, 0x0, ...)
	/usr/local/go/src/pkg/bytes/buffer.go:169 +0x203
io.Copy(0xc2000ff840, 0xc20014e700, 0xc2000ff720, 0xc200000d10, 0x0, ...)
	/usr/local/go/src/pkg/io/io.go:340 +0xa3
os/exec.func·003(0x620fd0, 0x620fe0)
	/usr/local/go/src/pkg/os/exec/exec.go:207 +0x60
os/exec.func·004(0xc20015e440)
	/usr/local/go/src/pkg/os/exec/exec.go:276 +0x2a
created by os/exec.(*Cmd).Start
	/usr/local/go/src/pkg/os/exec/exec.go:277 +0x732

goroutine 16 [syscall]:
syscall.Syscall()
	/usr/local/go/src/pkg/syscall/asm_darwin_amd64.s:15 +0x5
syscall.read(0xc, 0xc20023976e, 0x1692, 0x1692, 0x6, ...)
	/usr/local/go/src/pkg/syscall/zsyscall_darwin_amd64.go:900 +0x70
syscall.Read(0xc, 0xc20023976e, 0x1692, 0x1692, 0x6, ...)
	/usr/local/go/src/pkg/syscall/syscall_unix.go:132 +0x5a
os.(*File).read(0xc200000d30, 0xc20023976e, 0x1692, 0x1692, 0x6, ...)
	/usr/local/go/src/pkg/os/file_unix.go:174 +0x60
os.(*File).Read(0xc200000d30, 0xc20023976e, 0x1692, 0x1692, 0x6, ...)
	/usr/local/go/src/pkg/os/file.go:95 +0x96
bytes.(*Buffer).ReadFrom(0xc20014e770, 0xc2000ff720, 0xc200000d30, 0x2db9, 0x0, ...)
	/usr/local/go/src/pkg/bytes/buffer.go:169 +0x203
io.Copy(0xc2000ff840, 0xc20014e770, 0xc2000ff720, 0xc200000d30, 0x0, ...)
	/usr/local/go/src/pkg/io/io.go:340 +0xa3
os/exec.func·003(0xc2000ba820, 0x1f9dc0)
	/usr/local/go/src/pkg/os/exec/exec.go:207 +0x60
os/exec.func·004(0xc20015e480)
	/usr/local/go/src/pkg/os/exec/exec.go:276 +0x2a
created by os/exec.(*Cmd).Start
	/usr/local/go/src/pkg/os/exec/exec.go:277 +0x732

goroutine 17 [syscall]:
syscall.Syscall6()
	/usr/local/go/src/pkg/syscall/asm_darwin_amd64.s:39 +0x5
syscall.wait4(0x8136, 0xc200000e00, 0x0, 0xc20017a000, 0x100000001, ...)
	/usr/local/go/src/pkg/syscall/zsyscall_darwin_amd64.go:32 +0x7b
syscall.Wait4(0x8136, 0x78be44, 0x0, 0xc20017a000, 0x0, ...)
	/usr/local/go/src/pkg/syscall/syscall_bsd.go:137 +0x6c
os.(*Process).wait(0xc20015e6e0, 0x0, 0x0, 0x0)
	/usr/local/go/src/pkg/os/exec_unix.go:22 +0xea
os.(*Process).Wait(0xc20015e6e0, 0x0, 0x0, 0x0)
	/usr/local/go/src/pkg/os/doc.go:43 +0x25
os/exec.(*Cmd).Wait(0xc200160000, 0x0, 0x0)
	/usr/local/go/src/pkg/os/exec/exec.go:310 +0x197
github.com/mitchellh/packer/packer/plugin.func·007()
	/Users/riywo/golang/src/github.com/mitchellh/packer/packer/plugin/client.go:243 +0x35
created by github.com/mitchellh/packer/packer/plugin.(*Client).Start
	/Users/riywo/golang/src/github.com/mitchellh/packer/packer/plugin/client.go:246 +0x734

goroutine 18 [sleep]:
time.Sleep(0x989680)
	/usr/local/go/src/pkg/runtime/ztime_darwin_amd64.c:19 +0x2f
github.com/mitchellh/packer/packer/plugin.(*Client).logStderr(0xc200136b70, 0xc20014e770)
	/Users/riywo/golang/src/github.com/mitchellh/packer/packer/plugin/client.go:305 +0x1e1
created by github.com/mitchellh/packer/packer/plugin.(*Client).Start
	/Users/riywo/golang/src/github.com/mitchellh/packer/packer/plugin/client.go:249 +0x75e

goroutine 19 [IO wait]:
net.runtime_pollWait(0x4fed20, 0x72, 0x0)
	/usr/local/go/src/pkg/runtime/znetpoll_darwin_amd64.c:118 +0x82
net.(*pollDesc).WaitRead(0xc2000cb620, 0x23, 0xc2000ff330)
	/usr/local/go/src/pkg/net/fd_poll_runtime.go:75 +0x31
net.(*netFD).Read(0xc2000cb5a0, 0xc2001a1000, 0x1000, 0x1000, 0x0, ...)
	/usr/local/go/src/pkg/net/fd_unix.go:195 +0x2b3
net.(*conn).Read(0xc200000578, 0xc2001a1000, 0x1000, 0x1000, 0x0, ...)
	/usr/local/go/src/pkg/net/net.go:123 +0xc3
bufio.(*Reader).fill(0xc2000d7720)
	/usr/local/go/src/pkg/bufio/bufio.go:79 +0x10c
bufio.(*Reader).Read(0xc2000d7720, 0xc200109050, 0x1, 0x9, 0x1, ...)
	/usr/local/go/src/pkg/bufio/bufio.go:147 +0x1b0
io.ReadAtLeast(0xc200136270, 0xc2000d7720, 0xc200109050, 0x1, 0x9, ...)
	/usr/local/go/src/pkg/io/io.go:284 +0xf7
io.ReadFull(0xc200136270, 0xc2000d7720, 0xc200109050, 0x1, 0x9, ...)
	/usr/local/go/src/pkg/io/io.go:302 +0x6f
encoding/gob.decodeUintReader(0xc200136270, 0xc2000d7720, 0xc200109050, 0x9, 0x9, ...)
	/usr/local/go/src/pkg/encoding/gob/decode.go:65 +0xaa
encoding/gob.(*Decoder).recvMessage(0xc2001a0000, 0xc2001a003c)
	/usr/local/go/src/pkg/encoding/gob/decoder.go:73 +0x4b
encoding/gob.(*Decoder).decodeTypeSequence(0xc2001a0000, 0xc200136f00, 0x160)
	/usr/local/go/src/pkg/encoding/gob/decoder.go:159 +0x47
encoding/gob.(*Decoder).DecodeValue(0xc2001a0000, 0x1e99c0, 0xc200136fc0, 0x160, 0x0, ...)
	/usr/local/go/src/pkg/encoding/gob/decoder.go:223 +0x101
encoding/gob.(*Decoder).Decode(0xc2001a0000, 0x1e99c0, 0xc200136fc0, 0x0, 0x0, ...)
	/usr/local/go/src/pkg/encoding/gob/decoder.go:202 +0x1c3
net/rpc.(*gobClientCodec).ReadResponseHeader(0xc2000dad80, 0xc200136fc0, 0xc2001f2f20, 0x0)
	/usr/local/go/src/pkg/net/rpc/client.go:218 +0x3d
net/rpc.(*Client).input(0xc2000d7780)
	/usr/local/go/src/pkg/net/rpc/client.go:106 +0xba
created by net/rpc.NewClientWithCodec
	/usr/local/go/src/pkg/net/rpc/client.go:196 +0x8f

goroutine 20 [IO wait]:
net.runtime_pollWait(0x4febe0, 0x72, 0x0)
	/usr/local/go/src/pkg/runtime/znetpoll_darwin_amd64.c:118 +0x82
net.(*pollDesc).WaitRead(0xc2000cb7d0, 0x23, 0xc2000ff330)
	/usr/local/go/src/pkg/net/fd_poll_runtime.go:75 +0x31
net.(*netFD).Read(0xc2000cb750, 0xc2001a3000, 0x1000, 0x1000, 0x0, ...)
	/usr/local/go/src/pkg/net/fd_unix.go:195 +0x2b3
net.(*conn).Read(0xc200000280, 0xc2001a3000, 0x1000, 0x1000, 0x0, ...)
	/usr/local/go/src/pkg/net/net.go:123 +0xc3
bufio.(*Reader).fill(0xc2000d77e0)
	/usr/local/go/src/pkg/bufio/bufio.go:79 +0x10c
bufio.(*Reader).Read(0xc2000d77e0, 0xc2001090b0, 0x1, 0x9, 0x1, ...)
	/usr/local/go/src/pkg/bufio/bufio.go:147 +0x1b0
io.ReadAtLeast(0xc200136270, 0xc2000d77e0, 0xc2001090b0, 0x1, 0x9, ...)
	/usr/local/go/src/pkg/io/io.go:284 +0xf7
io.ReadFull(0xc200136270, 0xc2000d77e0, 0xc2001090b0, 0x1, 0x9, ...)
	/usr/local/go/src/pkg/io/io.go:302 +0x6f
encoding/gob.decodeUintReader(0xc200136270, 0xc2000d77e0, 0xc2001090b0, 0x9, 0x9, ...)
	/usr/local/go/src/pkg/encoding/gob/decode.go:65 +0xaa
encoding/gob.(*Decoder).recvMessage(0xc2001a00f0, 0xc2001e8000)
	/usr/local/go/src/pkg/encoding/gob/decoder.go:73 +0x4b
encoding/gob.(*Decoder).decodeTypeSequence(0xc2001a00f0, 0xc200101200, 0x160)
	/usr/local/go/src/pkg/encoding/gob/decoder.go:159 +0x47
encoding/gob.(*Decoder).DecodeValue(0xc2001a00f0, 0x1e9980, 0xc200101280, 0x160, 0x0, ...)
	/usr/local/go/src/pkg/encoding/gob/decoder.go:223 +0x101
encoding/gob.(*Decoder).Decode(0xc2001a00f0, 0x1e9980, 0xc200101280, 0x0, 0x0, ...)
	/usr/local/go/src/pkg/encoding/gob/decoder.go:202 +0x1c3
net/rpc.(*gobServerCodec).ReadRequestHeader(0xc2000ffab0, 0xc200101280, 0xc2001f2e40, 0xec843)
	/usr/local/go/src/pkg/net/rpc/server.go:398 +0x3d
net/rpc.(*Server).readRequestHeader(0xc2000fdac0, 0xc200138dc0, 0xc2000ffab0, 0x0, 0x0, ...)
	/usr/local/go/src/pkg/net/rpc/server.go:549 +0x99
net/rpc.(*Server).readRequest(0xc2000fdac0, 0xc200138dc0, 0xc2000ffab0, 0xc2000d8680, 0xc2001e56a0, ...)
	/usr/local/go/src/pkg/net/rpc/server.go:516 +0x9e
net/rpc.(*Server).ServeCodec(0xc2000fdac0, 0xc200138dc0, 0xc2000ffab0)
	/usr/local/go/src/pkg/net/rpc/server.go:435 +0x64
net/rpc.(*Server).ServeConn(0xc2000fdac0, 0xc200138040, 0xc200000280)
	/usr/local/go/src/pkg/net/rpc/server.go:427 +0x13e
github.com/mitchellh/packer/packer/rpc.func·005()
	/Users/riywo/golang/src/github.com/mitchellh/packer/packer/rpc/server.go:84 +0xf7
created by github.com/mitchellh/packer/packer/rpc.serveSingleConn
	/Users/riywo/golang/src/github.com/mitchellh/packer/packer/rpc/server.go:85 +0xb8

goroutine 22 [syscall]:
syscall.Syscall()
	/usr/local/go/src/pkg/syscall/asm_darwin_amd64.s:15 +0x5
syscall.read(0xf, 0xc2001ce007, 0x5f9, 0x5f9, 0x7, ...)
	/usr/local/go/src/pkg/syscall/zsyscall_darwin_amd64.go:900 +0x70
syscall.Read(0xf, 0xc2001ce007, 0x5f9, 0x5f9, 0x17964, ...)
	/usr/local/go/src/pkg/syscall/syscall_unix.go:132 +0x5a
os.(*File).read(0xc200000370, 0xc2001ce007, 0x5f9, 0x5f9, 0xc2001ce000, ...)
	/usr/local/go/src/pkg/os/file_unix.go:174 +0x60
os.(*File).Read(0xc200000370, 0xc2001ce007, 0x5f9, 0x5f9, 0x7, ...)
	/usr/local/go/src/pkg/os/file.go:95 +0x96
bytes.(*Buffer).ReadFrom(0xc2000c87e0, 0xc2000ff720, 0xc200000370, 0x7, 0x0, ...)
	/usr/local/go/src/pkg/bytes/buffer.go:169 +0x203
io.Copy(0xc2000ff840, 0xc2000c87e0, 0xc2000ff720, 0xc200000370, 0x0, ...)
	/usr/local/go/src/pkg/io/io.go:340 +0xa3
os/exec.func·003(0x620000, 0x620010)
	/usr/local/go/src/pkg/os/exec/exec.go:207 +0x60
os/exec.func·004(0xc200101480)
	/usr/local/go/src/pkg/os/exec/exec.go:276 +0x2a
created by os/exec.(*Cmd).Start
	/usr/local/go/src/pkg/os/exec/exec.go:277 +0x732

goroutine 23 [syscall]:
syscall.Syscall()
	/usr/local/go/src/pkg/syscall/asm_darwin_amd64.s:15 +0x5
syscall.read(0x11, 0xc20013272c, 0x4d4, 0x4d4, 0x33, ...)
	/usr/local/go/src/pkg/syscall/zsyscall_darwin_amd64.go:900 +0x70
syscall.Read(0x11, 0xc20013272c, 0x4d4, 0x4d4, 0x33, ...)
	/usr/local/go/src/pkg/syscall/syscall_unix.go:132 +0x5a
os.(*File).read(0xc2000003b0, 0xc20013272c, 0x4d4, 0x4d4, 0x33, ...)
	/usr/local/go/src/pkg/os/file_unix.go:174 +0x60
os.(*File).Read(0xc2000003b0, 0xc20013272c, 0x4d4, 0x4d4, 0x33, ...)
	/usr/local/go/src/pkg/os/file.go:95 +0x96
bytes.(*Buffer).ReadFrom(0xc2000c8850, 0xc2000ff720, 0xc2000003b0, 0x12c, 0x0, ...)
	/usr/local/go/src/pkg/bytes/buffer.go:169 +0x203
io.Copy(0xc2000ff840, 0xc2000c8850, 0xc2000ff720, 0xc2000003b0, 0x0, ...)
	/usr/local/go/src/pkg/io/io.go:340 +0xa3
os/exec.func·003(0xc2000ba820, 0x1f9dc0)
	/usr/local/go/src/pkg/os/exec/exec.go:207 +0x60
os/exec.func·004(0xc2001014c0)
	/usr/local/go/src/pkg/os/exec/exec.go:276 +0x2a
created by os/exec.(*Cmd).Start
	/usr/local/go/src/pkg/os/exec/exec.go:277 +0x732

goroutine 24 [syscall]:
syscall.Syscall6()
	/usr/local/go/src/pkg/syscall/asm_darwin_amd64.s:39 +0x5
syscall.wait4(0x8137, 0xc2000003e0, 0x0, 0xc2000cb900, 0x100000001, ...)
	/usr/local/go/src/pkg/syscall/zsyscall_darwin_amd64.go:32 +0x7b
syscall.Wait4(0x8137, 0x7aee44, 0x0, 0xc2000cb900, 0x0, ...)
	/usr/local/go/src/pkg/syscall/syscall_bsd.go:137 +0x6c
os.(*Process).wait(0xc200101920, 0x0, 0x0, 0x0)
	/usr/local/go/src/pkg/os/exec_unix.go:22 +0xea
os.(*Process).Wait(0xc200101920, 0x0, 0x0, 0x0)
	/usr/local/go/src/pkg/os/doc.go:43 +0x25
os/exec.(*Cmd).Wait(0xc2000d03c0, 0x0, 0x0)
	/usr/local/go/src/pkg/os/exec/exec.go:310 +0x197
github.com/mitchellh/packer/packer/plugin.func·007()
	/Users/riywo/golang/src/github.com/mitchellh/packer/packer/plugin/client.go:243 +0x35
created by github.com/mitchellh/packer/packer/plugin.(*Client).Start
	/Users/riywo/golang/src/github.com/mitchellh/packer/packer/plugin/client.go:246 +0x734

goroutine 25 [sleep]:
time.Sleep(0x989680)
	/usr/local/go/src/pkg/runtime/ztime_darwin_amd64.c:19 +0x2f
github.com/mitchellh/packer/packer/plugin.(*Client).logStderr(0xc200136000, 0xc2000c8850)
	/Users/riywo/golang/src/github.com/mitchellh/packer/packer/plugin/client.go:305 +0x1e1
created by github.com/mitchellh/packer/packer/plugin.(*Client).Start
	/Users/riywo/golang/src/github.com/mitchellh/packer/packer/plugin/client.go:249 +0x75e

goroutine 26 [IO wait]:
net.runtime_pollWait(0x4feb40, 0x72, 0x0)
	/usr/local/go/src/pkg/runtime/znetpoll_darwin_amd64.c:118 +0x82
net.(*pollDesc).WaitRead(0xc200137500, 0x23, 0xc2000ff330)
	/usr/local/go/src/pkg/net/fd_poll_runtime.go:75 +0x31
net.(*netFD).Read(0xc200137480, 0xc2001d1000, 0x1000, 0x1000, 0x0, ...)
	/usr/local/go/src/pkg/net/fd_unix.go:195 +0x2b3
net.(*conn).Read(0xc200000d90, 0xc2001d1000, 0x1000, 0x1000, 0x0, ...)
	/usr/local/go/src/pkg/net/net.go:123 +0xc3
bufio.(*Reader).fill(0xc20015d660)
	/usr/local/go/src/pkg/bufio/bufio.go:79 +0x10c
bufio.(*Reader).Read(0xc20015d660, 0xc200109bd0, 0x1, 0x9, 0x1, ...)
	/usr/local/go/src/pkg/bufio/bufio.go:147 +0x1b0
io.ReadAtLeast(0xc200136270, 0xc20015d660, 0xc200109bd0, 0x1, 0x9, ...)
	/usr/local/go/src/pkg/io/io.go:284 +0xf7
io.ReadFull(0xc200136270, 0xc20015d660, 0xc200109bd0, 0x1, 0x9, ...)
	/usr/local/go/src/pkg/io/io.go:302 +0x6f
encoding/gob.decodeUintReader(0xc200136270, 0xc20015d660, 0xc200109bd0, 0x9, 0x9, ...)
	/usr/local/go/src/pkg/encoding/gob/decode.go:65 +0xaa
encoding/gob.(*Decoder).recvMessage(0xc2001492d0, 0xc20014930c)
	/usr/local/go/src/pkg/encoding/gob/decoder.go:73 +0x4b
encoding/gob.(*Decoder).decodeTypeSequence(0xc2001492d0, 0xc2000ffc00, 0x160)
	/usr/local/go/src/pkg/encoding/gob/decoder.go:159 +0x47
encoding/gob.(*Decoder).DecodeValue(0xc2001492d0, 0x1e99c0, 0xc2000ffcf0, 0x160, 0x0, ...)
	/usr/local/go/src/pkg/encoding/gob/decoder.go:223 +0x101
encoding/gob.(*Decoder).Decode(0xc2001492d0, 0x1e99c0, 0xc2000ffcf0, 0x0, 0x0, ...)
	/usr/local/go/src/pkg/encoding/gob/decoder.go:202 +0x1c3
net/rpc.(*gobClientCodec).ReadResponseHeader(0xc2001a46c0, 0xc2000ffcf0, 0xc2001f2880, 0x0)
	/usr/local/go/src/pkg/net/rpc/client.go:218 +0x3d
net/rpc.(*Client).input(0xc20015d6c0)
	/usr/local/go/src/pkg/net/rpc/client.go:106 +0xba
created by net/rpc.NewClientWithCodec
	/usr/local/go/src/pkg/net/rpc/client.go:196 +0x8f

goroutine 27 [IO wait]:
net.runtime_pollWait(0x4fea00, 0x72, 0x0)
	/usr/local/go/src/pkg/runtime/znetpoll_darwin_amd64.c:118 +0x82
net.(*pollDesc).WaitRead(0xc200137620, 0x23, 0xc2000ff330)
	/usr/local/go/src/pkg/net/fd_poll_runtime.go:75 +0x31
net.(*netFD).Read(0xc2001375a0, 0xc2001d4000, 0x1000, 0x1000, 0x0, ...)
	/usr/local/go/src/pkg/net/fd_unix.go:195 +0x2b3
net.(*conn).Read(0xc200000668, 0xc2001d4000, 0x1000, 0x1000, 0x0, ...)
	/usr/local/go/src/pkg/net/net.go:123 +0xc3
bufio.(*Reader).fill(0xc20015d720)
	/usr/local/go/src/pkg/bufio/bufio.go:79 +0x10c
bufio.(*Reader).Read(0xc20015d720, 0xc2000b9d30, 0x1, 0x9, 0x1, ...)
	/usr/local/go/src/pkg/bufio/bufio.go:147 +0x1b0
io.ReadAtLeast(0xc200136270, 0xc20015d720, 0xc2000b9d30, 0x1, 0x9, ...)
	/usr/local/go/src/pkg/io/io.go:284 +0xf7
io.ReadFull(0xc200136270, 0xc20015d720, 0xc2000b9d30, 0x1, 0x9, ...)
	/usr/local/go/src/pkg/io/io.go:302 +0x6f
encoding/gob.decodeUintReader(0xc200136270, 0xc20015d720, 0xc2000b9d30, 0x9, 0x9, ...)
	/usr/local/go/src/pkg/encoding/gob/decode.go:65 +0xaa
encoding/gob.(*Decoder).recvMessage(0xc2001493c0, 0xc2001493fc)
	/usr/local/go/src/pkg/encoding/gob/decoder.go:73 +0x4b
encoding/gob.(*Decoder).decodeTypeSequence(0xc2001493c0, 0xc2001f4800, 0x160)
	/usr/local/go/src/pkg/encoding/gob/decoder.go:159 +0x47
encoding/gob.(*Decoder).DecodeValue(0xc2001493c0, 0x1e9980, 0xc2001f4800, 0x160, 0x0, ...)
	/usr/local/go/src/pkg/encoding/gob/decoder.go:223 +0x101
encoding/gob.(*Decoder).Decode(0xc2001493c0, 0x1e9980, 0xc2001f4800, 0x21ee3, 0xc2001f2860, ...)
	/usr/local/go/src/pkg/encoding/gob/decoder.go:202 +0x1c3
net/rpc.(*gobServerCodec).ReadRequestHeader(0xc2001a4a80, 0xc2001f4800, 0xc2001f2860, 0xec843)
	/usr/local/go/src/pkg/net/rpc/server.go:398 +0x3d
net/rpc.(*Server).readRequestHeader(0xc20015cec0, 0xc200138dc0, 0xc2001a4a80, 0x0, 0x0, ...)
	/usr/local/go/src/pkg/net/rpc/server.go:549 +0x99
net/rpc.(*Server).readRequest(0xc20015cec0, 0xc200138dc0, 0xc2001a4a80, 0xc20014ca00, 0xc20015e7e0, ...)
	/usr/local/go/src/pkg/net/rpc/server.go:516 +0x9e
net/rpc.(*Server).ServeCodec(0xc20015cec0, 0xc200138dc0, 0xc2001a4a80)
	/usr/local/go/src/pkg/net/rpc/server.go:435 +0x64
net/rpc.(*Server).ServeConn(0xc20015cec0, 0xc200138040, 0xc200000668)
	/usr/local/go/src/pkg/net/rpc/server.go:427 +0x13e
github.com/mitchellh/packer/packer/rpc.func·005()
	/Users/riywo/golang/src/github.com/mitchellh/packer/packer/rpc/server.go:84 +0xf7
created by github.com/mitchellh/packer/packer/rpc.serveSingleConn
	/Users/riywo/golang/src/github.com/mitchellh/packer/packer/rpc/server.go:85 +0xb8

goroutine 29 [IO wait]:
net.runtime_pollWait(0x4fe8c0, 0x72, 0x0)
	/usr/local/go/src/pkg/runtime/znetpoll_darwin_amd64.c:118 +0x82
net.(*pollDesc).WaitRead(0xc200137740, 0x23, 0xc2000ff330)
	/usr/local/go/src/pkg/net/fd_poll_runtime.go:75 +0x31
net.(*netFD).Read(0xc2001376c0, 0xc2001d7000, 0x1000, 0x1000, 0x0, ...)
	/usr/local/go/src/pkg/net/fd_unix.go:195 +0x2b3
net.(*conn).Read(0xc200000838, 0xc2001d7000, 0x1000, 0x1000, 0x0, ...)
	/usr/local/go/src/pkg/net/net.go:123 +0xc3
bufio.(*Reader).fill(0xc20015d780)
	/usr/local/go/src/pkg/bufio/bufio.go:79 +0x10c
bufio.(*Reader).Read(0xc20015d780, 0xc2000b9ea0, 0x1, 0x9, 0x1, ...)
	/usr/local/go/src/pkg/bufio/bufio.go:147 +0x1b0
io.ReadAtLeast(0xc200136270, 0xc20015d780, 0xc2000b9ea0, 0x1, 0x9, ...)
	/usr/local/go/src/pkg/io/io.go:284 +0xf7
io.ReadFull(0xc200136270, 0xc20015d780, 0xc2000b9ea0, 0x1, 0x9, ...)
	/usr/local/go/src/pkg/io/io.go:302 +0x6f
encoding/gob.decodeUintReader(0xc200136270, 0xc20015d780, 0xc2000b9ea0, 0x9, 0x9, ...)
	/usr/local/go/src/pkg/encoding/gob/decode.go:65 +0xaa
encoding/gob.(*Decoder).recvMessage(0xc2001494b0, 0xc2001a05a0)
	/usr/local/go/src/pkg/encoding/gob/decoder.go:73 +0x4b
encoding/gob.(*Decoder).decodeTypeSequence(0xc2001494b0, 0xc20015e400, 0x160)
	/usr/local/go/src/pkg/encoding/gob/decoder.go:159 +0x47
encoding/gob.(*Decoder).DecodeValue(0xc2001494b0, 0x1e9980, 0xc20015e420, 0x160, 0x0, ...)
	/usr/local/go/src/pkg/encoding/gob/decoder.go:223 +0x101
encoding/gob.(*Decoder).Decode(0xc2001494b0, 0x1e9980, 0xc20015e420, 0x0, 0x0, ...)
	/usr/local/go/src/pkg/encoding/gob/decoder.go:202 +0x1c3
net/rpc.(*gobServerCodec).ReadRequestHeader(0xc2001a4f30, 0xc20015e420, 0x1692d, 0x3d03)
	/usr/local/go/src/pkg/net/rpc/server.go:398 +0x3d
net/rpc.(*Server).readRequestHeader(0xc200138880, 0xc200138dc0, 0xc2001a4f30, 0x0, 0x0, ...)
	/usr/local/go/src/pkg/net/rpc/server.go:549 +0x99
net/rpc.(*Server).readRequest(0xc200138880, 0xc200138dc0, 0xc2001a4f30, 0xc20014cc80, 0xc2000ca200, ...)
	/usr/local/go/src/pkg/net/rpc/server.go:516 +0x9e
net/rpc.(*Server).ServeCodec(0xc200138880, 0xc200138dc0, 0xc2001a4f30)
	/usr/local/go/src/pkg/net/rpc/server.go:435 +0x64
net/rpc.(*Server).ServeConn(0xc200138880, 0xc200138040, 0xc200000838)
	/usr/local/go/src/pkg/net/rpc/server.go:427 +0x13e
github.com/mitchellh/packer/packer/rpc.func·005()
	/Users/riywo/golang/src/github.com/mitchellh/packer/packer/rpc/server.go:84 +0xf7
created by github.com/mitchellh/packer/packer/rpc.serveSingleConn
	/Users/riywo/golang/src/github.com/mitchellh/packer/packer/rpc/server.go:85 +0xb8

goroutine 32 [IO wait]:
net.runtime_pollWait(0x4fe780, 0x72, 0x0)
	/usr/local/go/src/pkg/runtime/znetpoll_darwin_amd64.c:118 +0x82
net.(*pollDesc).WaitRead(0xc200137a10, 0x23, 0xc2000ff330)
	/usr/local/go/src/pkg/net/fd_poll_runtime.go:75 +0x31
net.(*netFD).Read(0xc200137990, 0xc2001df000, 0x1000, 0x1000, 0x0, ...)
	/usr/local/go/src/pkg/net/fd_unix.go:195 +0x2b3
net.(*conn).Read(0xc2001dd0e0, 0xc2001df000, 0x1000, 0x1000, 0x0, ...)
	/usr/local/go/src/pkg/net/net.go:123 +0xc3
bufio.(*Reader).fill(0xc20015dba0)
	/usr/local/go/src/pkg/bufio/bufio.go:79 +0x10c
bufio.(*Reader).Read(0xc20015dba0, 0xc200109b00, 0x1, 0x9, 0x1, ...)
	/usr/local/go/src/pkg/bufio/bufio.go:147 +0x1b0
io.ReadAtLeast(0xc200136270, 0xc20015dba0, 0xc200109b00, 0x1, 0x9, ...)
	/usr/local/go/src/pkg/io/io.go:284 +0xf7
io.ReadFull(0xc200136270, 0xc20015dba0, 0xc200109b00, 0x1, 0x9, ...)
	/usr/local/go/src/pkg/io/io.go:302 +0x6f
encoding/gob.decodeUintReader(0xc200136270, 0xc20015dba0, 0xc200109b00, 0x9, 0x9, ...)
	/usr/local/go/src/pkg/encoding/gob/decode.go:65 +0xaa
encoding/gob.(*Decoder).recvMessage(0xc200149690, 0xc2001496cc)
	/usr/local/go/src/pkg/encoding/gob/decoder.go:73 +0x4b
encoding/gob.(*Decoder).decodeTypeSequence(0xc200149690, 0xc20015ed00, 0x160)
	/usr/local/go/src/pkg/encoding/gob/decoder.go:159 +0x47
encoding/gob.(*Decoder).DecodeValue(0xc200149690, 0x1e9980, 0xc20015eda0, 0x160, 0x0, ...)
	/usr/local/go/src/pkg/encoding/gob/decoder.go:223 +0x101
encoding/gob.(*Decoder).Decode(0xc200149690, 0x1e9980, 0xc20015eda0, 0x21ee3, 0x17073, ...)
	/usr/local/go/src/pkg/encoding/gob/decoder.go:202 +0x1c3
net/rpc.(*gobServerCodec).ReadRequestHeader(0xc2001d86f0, 0xc20015eda0, 0x1692d, 0x3d03)
	/usr/local/go/src/pkg/net/rpc/server.go:398 +0x3d
net/rpc.(*Server).readRequestHeader(0xc2001da1c0, 0xc200138dc0, 0xc2001d86f0, 0x0, 0x0, ...)
	/usr/local/go/src/pkg/net/rpc/server.go:549 +0x99
net/rpc.(*Server).readRequest(0xc2001da1c0, 0xc200138dc0, 0xc2001d86f0, 0xc20014ce80, 0xc20015e880, ...)
	/usr/local/go/src/pkg/net/rpc/server.go:516 +0x9e
net/rpc.(*Server).ServeCodec(0xc2001da1c0, 0xc200138dc0, 0xc2001d86f0)
	/usr/local/go/src/pkg/net/rpc/server.go:435 +0x64
net/rpc.(*Server).ServeConn(0xc2001da1c0, 0xc200138040, 0xc2001dd0e0)
	/usr/local/go/src/pkg/net/rpc/server.go:427 +0x13e
github.com/mitchellh/packer/packer/rpc.func·005()
	/Users/riywo/golang/src/github.com/mitchellh/packer/packer/rpc/server.go:84 +0xf7
created by github.com/mitchellh/packer/packer/rpc.serveSingleConn
	/Users/riywo/golang/src/github.com/mitchellh/packer/packer/rpc/server.go:85 +0xb8

goroutine 37 [IO wait]:
net.runtime_pollWait(0x4fe640, 0x72, 0x0)
	/usr/local/go/src/pkg/runtime/znetpoll_darwin_amd64.c:118 +0x82
net.(*pollDesc).WaitRead(0xc20017a7d0, 0x23, 0xc2000ff330)
	/usr/local/go/src/pkg/net/fd_poll_runtime.go:75 +0x31
net.(*netFD).Read(0xc20017a750, 0xc200206000, 0x1000, 0x1000, 0x0, ...)
	/usr/local/go/src/pkg/net/fd_unix.go:195 +0x2b3
net.(*conn).Read(0xc2001f7830, 0xc200206000, 0x1000, 0x1000, 0x0, ...)
	/usr/local/go/src/pkg/net/net.go:123 +0xc3
bufio.(*Reader).fill(0xc2001fa540)
	/usr/local/go/src/pkg/bufio/bufio.go:79 +0x10c
bufio.(*Reader).Read(0xc2001fa540, 0xc2001f2d60, 0x1, 0x9, 0x1, ...)
	/usr/local/go/src/pkg/bufio/bufio.go:147 +0x1b0
io.ReadAtLeast(0xc200136270, 0xc2001fa540, 0xc2001f2d60, 0x1, 0x9, ...)
	/usr/local/go/src/pkg/io/io.go:284 +0xf7
io.ReadFull(0xc200136270, 0xc2001fa540, 0xc2001f2d60, 0x1, 0x9, ...)
	/usr/local/go/src/pkg/io/io.go:302 +0x6f
encoding/gob.decodeUintReader(0xc200136270, 0xc2001fa540, 0xc2001f2d60, 0x9, 0x9, ...)
	/usr/local/go/src/pkg/encoding/gob/decode.go:65 +0xaa
encoding/gob.(*Decoder).recvMessage(0xc2001f02d0, 0xc2000c2a80)
	/usr/local/go/src/pkg/encoding/gob/decoder.go:73 +0x4b
encoding/gob.(*Decoder).decodeTypeSequence(0xc2001f02d0, 0xc2001f4e00, 0x160)
	/usr/local/go/src/pkg/encoding/gob/decoder.go:159 +0x47
encoding/gob.(*Decoder).DecodeValue(0xc2001f02d0, 0x1e9980, 0xc2001f4e80, 0x160, 0x0, ...)
	/usr/local/go/src/pkg/encoding/gob/decoder.go:223 +0x101
encoding/gob.(*Decoder).Decode(0xc2001f02d0, 0x1e9980, 0xc2001f4e80, 0x0, 0x0, ...)
	/usr/local/go/src/pkg/encoding/gob/decoder.go:202 +0x1c3
net/rpc.(*gobServerCodec).ReadRequestHeader(0xc2001fd8d0, 0xc2001f4e80, 0x1692d, 0x3d03)
	/usr/local/go/src/pkg/net/rpc/server.go:398 +0x3d
net/rpc.(*Server).readRequestHeader(0xc2001feec0, 0xc200138dc0, 0xc2001fd8d0, 0x0, 0x0, ...)
	/usr/local/go/src/pkg/net/rpc/server.go:549 +0x99
net/rpc.(*Server).readRequest(0xc2001feec0, 0xc200138dc0, 0xc2001fd8d0, 0xc200201100, 0xc200210be0, ...)
	/usr/local/go/src/pkg/net/rpc/server.go:516 +0x9e
net/rpc.(*Server).ServeCodec(0xc2001feec0, 0xc200138dc0, 0xc2001fd8d0)
	/usr/local/go/src/pkg/net/rpc/server.go:435 +0x64
net/rpc.(*Server).ServeConn(0xc2001feec0, 0xc200138040, 0xc2001f7830)
	/usr/local/go/src/pkg/net/rpc/server.go:427 +0x13e
github.com/mitchellh/packer/packer/rpc.func·005()
	/Users/riywo/golang/src/github.com/mitchellh/packer/packer/rpc/server.go:84 +0xf7
created by github.com/mitchellh/packer/packer/rpc.serveSingleConn
	/Users/riywo/golang/src/github.com/mitchellh/packer/packer/rpc/server.go:85 +0xb8

goroutine 39 [IO wait]:
net.runtime_pollWait(0x4fe5a0, 0x72, 0x0)
	/usr/local/go/src/pkg/runtime/znetpoll_darwin_amd64.c:118 +0x82
net.(*pollDesc).WaitRead(0xc20017a860, 0x23, 0xc2000ff330)
	/usr/local/go/src/pkg/net/fd_poll_runtime.go:75 +0x31
net.(*netFD).Read(0xc20017a7e0, 0xc20020b000, 0x1000, 0x1000, 0x0, ...)
	/usr/local/go/src/pkg/net/fd_unix.go:195 +0x2b3
net.(*conn).Read(0xc2001f78d0, 0xc20020b000, 0x1000, 0x1000, 0x0, ...)
	/usr/local/go/src/pkg/net/net.go:123 +0xc3
bufio.(*Reader).fill(0xc2001fa660)
	/usr/local/go/src/pkg/bufio/bufio.go:79 +0x10c
bufio.(*Reader).Read(0xc2001fa660, 0xc2001f2e60, 0x1, 0x9, 0x1, ...)
	/usr/local/go/src/pkg/bufio/bufio.go:147 +0x1b0
io.ReadAtLeast(0xc200136270, 0xc2001fa660, 0xc2001f2e60, 0x1, 0x9, ...)
	/usr/local/go/src/pkg/io/io.go:284 +0xf7
io.ReadFull(0xc200136270, 0xc2001fa660, 0xc2001f2e60, 0x1, 0x9, ...)
	/usr/local/go/src/pkg/io/io.go:302 +0x6f
encoding/gob.decodeUintReader(0xc200136270, 0xc2001fa660, 0xc2001f2e60, 0x9, 0x9, ...)
	/usr/local/go/src/pkg/encoding/gob/decode.go:65 +0xaa
encoding/gob.(*Decoder).recvMessage(0xc2001f03c0, 0xc2001a04b0)
	/usr/local/go/src/pkg/encoding/gob/decoder.go:73 +0x4b
encoding/gob.(*Decoder).decodeTypeSequence(0xc2001f03c0, 0xc2001fdb00, 0x160)
	/usr/local/go/src/pkg/encoding/gob/decoder.go:159 +0x47
encoding/gob.(*Decoder).DecodeValue(0xc2001f03c0, 0x1e99c0, 0xc2001fdba0, 0x160, 0x0, ...)
	/usr/local/go/src/pkg/encoding/gob/decoder.go:223 +0x101
encoding/gob.(*Decoder).Decode(0xc2001f03c0, 0x1e99c0, 0xc2001fdba0, 0x0, 0x0, ...)
	/usr/local/go/src/pkg/encoding/gob/decoder.go:202 +0x1c3
net/rpc.(*gobClientCodec).ReadResponseHeader(0xc2001fdb40, 0xc2001fdba0, 0xc2001e3ec0, 0x0)
	/usr/local/go/src/pkg/net/rpc/client.go:218 +0x3d
net/rpc.(*Client).input(0xc2001fa6c0)
	/usr/local/go/src/pkg/net/rpc/client.go:106 +0xba
created by net/rpc.NewClientWithCodec
	/usr/local/go/src/pkg/net/rpc/client.go:196 +0x8f

goroutine 40 [chan receive]:
github.com/mitchellh/packer/packer/rpc.(*builder).Run(0xc200000588, 0xc200202b80, 0xc2001f7930, 0xc2001fdc90, 0xc2001f7928, ...)
	/Users/riywo/golang/src/github.com/mitchellh/packer/packer/rpc/builder.go:88 +0x30f
github.com/mitchellh/packer/packer/plugin.(*cmdBuilder).Run(0xc200101740, 0xc200202b80, 0xc2001f7930, 0xc2001fdc90, 0xc2001f7928, ...)
	/Users/riywo/golang/src/github.com/mitchellh/packer/packer/plugin/builder.go:28 +0xeb
github.com/mitchellh/packer/packer/rpc.func·002()
	/Users/riywo/golang/src/github.com/mitchellh/packer/packer/rpc/builder.go:140 +0x1a9
created by github.com/mitchellh/packer/packer/rpc.(*BuilderServer).Run
	/Users/riywo/golang/src/github.com/mitchellh/packer/packer/rpc/builder.go:158 +0x1c8

test.json

{
  "builders": [{
    "type": "virtualbox",
    "guest_os_type": "Ubuntu_64",
    "iso_url": "http://releases.ubuntu.com/12.04/ubuntu-12.04.2-server-amd64.iso",
    "iso_md5": "af5f788aee1b32c4b2634734309cc9e9",
    "ssh_username": "packer",
    "ssh_wait_timeout": "120s",
    "boot_wait": "30s",
    "boot_command": [
      "<esc><esc><enter><wait>",
      "/install/vmlinuz noapic ",
      "preseed/url=http://{{ .HTTPIP }}:{{ .HTTPPort }}/preseed.cfg ",
      "debian-installer=en_US auto locale=en_US kbd-chooser/method=us ",
      "hostname={{ .Name }} ",
      "fb=false debconf/frontend=noninteractive ",
      "keyboard-configuration/modelcode=SKIP keyboard-configuration/layout=USA ",
      "keyboard-configuration/variant=USA console-setup/ask_detect=false ",
      "initrd=/install/initrd.gz -- <enter>"
    ]
  }],
  "post-processors": ["vagrant"]
}