Go 1.6.2 doesn't support macOS 10.12, please upgrade to Go 1.7.

On Sep 26, 2016 4:34 PM, "Bart Grantham" [email protected] wrote:

I'm working through some tutorial code for the "Go Web Programming" book
by Sau Sheong Chang (Manning, 2016) and got "fatal error: unexpected signal
during runtime execution" trying to run go build once, then tried a
second time a minute later without trying anything and it worked. The code
I was building is here
https://github.com/sausheong/gwp/tree/master/Chapter_2_Go_ChitChat/chitchat
.

I want to reiterate: this happened just once. A subsequent run of go build _without
changing anything_ worked as expected. Unfortunately I have virtually no
information to provide besides a cut and paste of the stack trace below
because I was unable to reproduce. I saw an issue had been opened
https://github.com/golang/go/issues/11792 with what appeared to be the
same bug, but that thread indicated that if it appeared on real hardware
(yes: 2013 MacBook Pro) that a new issue should be opened.

go version : go version go1.6.2 darwin/amd64
go env :

GOARCH="amd64"
GOBIN=""
GOEXE=""
GOHOSTARCH="amd64"
GOHOSTOS="darwin"
GOOS="darwin"
GOPATH="/Users/bart/go"
GORACE=""
GOROOT="/usr/local/Cellar/go/1.6.2/libexec"
GOTOOLDIR="/usr/local/Cellar/go/1.6.2/libexec/pkg/tool/darwin_amd64"
GO15VENDOREXPERIMENT="1"
CC="clang"
GOGCCFLAGS="-fPIC -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fno-common"
CXX="clang++"
CGO_ENABLED="1"

bart@Barts-MBP:chitchat (master*)$ go build

github.com/sausheong/gwp/Chapter_2_Go_ChitChat/chitchat/data

fatal error: unexpected signal during runtime execution
[signal 0xb code=0x1 addr=0x7b6c76bc73b0 pc=0xf0eb]

runtime stack:
runtime.throw(0x4971e0, 0x2a)
/usr/local/Cellar/go/1.6.2/libexec/src/runtime/panic.go:547 +0x90
runtime.sigpanic()
/usr/local/Cellar/go/1.6.2/libexec/src/runtime/sigpanic_unix.go:12 +0x5a
runtime.unlock(0x984540)
/usr/local/Cellar/go/1.6.2/libexec/src/runtime/lock_sema.go:107 +0x14b
runtime.(_mheap).alloc_m(0x984540, 0x1, 0x9, 0xb92fa0)
/usr/local/Cellar/go/1.6.2/libexec/src/runtime/mheap.go:492 +0x314
runtime.(_mheap).alloc.func1()
/usr/local/Cellar/go/1.6.2/libexec/src/runtime/mheap.go:502 +0x41
runtime.systemstack(0x7fff5fbff218)
/usr/local/Cellar/go/1.6.2/libexec/src/runtime/asm_amd64.s:307 +0xab
runtime.(_mheap).alloc(0x984540, 0x1, 0x10000000009, 0xed8f)
/usr/local/Cellar/go/1.6.2/libexec/src/runtime/mheap.go:503 +0x63
runtime.(_mcentral).grow(0x985c00, 0x0)
/usr/local/Cellar/go/1.6.2/libexec/src/runtime/mcentral.go:209 +0x93
runtime.(_mcentral).cacheSpan(0x985c00, 0xb54508)
/usr/local/Cellar/go/1.6.2/libexec/src/runtime/mcentral.go:89 +0x47d
runtime.(_mcache).refill(0xaf64b0, 0x9, 0xb54508)
/usr/local/Cellar/go/1.6.2/libexec/src/runtime/mcache.go:119 +0xcc
runtime.mallocgc.func2()
/usr/local/Cellar/go/1.6.2/libexec/src/runtime/malloc.go:642 +0x2b
runtime.systemstack(0x975d00)
/usr/local/Cellar/go/1.6.2/libexec/src/runtime/asm_amd64.s:291 +0x79
runtime.mstart()
/usr/local/Cellar/go/1.6.2/libexec/src/runtime/proc.go:1051

goroutine 1 [running]:
runtime.systemstack_switch()
/usr/local/Cellar/go/1.6.2/libexec/src/runtime/asm_amd64.s:245 fp=0xc82084cfe0 sp=0xc82084cfd8
runtime.mallocgc(0x80, 0x405340, 0xc800000000, 0x11029)
/usr/local/Cellar/go/1.6.2/libexec/src/runtime/malloc.go:643 +0x869 fp=0xc82084d0b8 sp=0xc82084cfe0
runtime.newarray(0x405340, 0x4, 0x0)
/usr/local/Cellar/go/1.6.2/libexec/src/runtime/malloc.go:798 +0xc9 fp=0xc82084d0f8 sp=0xc82084d0b8
runtime.growslice(0x3b0120, 0xc820ac9740, 0x2, 0x2, 0x3, 0x0, 0x0, 0x0)
/usr/local/Cellar/go/1.6.2/libexec/src/runtime/slice.go:100 +0x2c1 fp=0xc82084d168 sp=0xc82084d0f8
cmd/compile/internal/gc.livenessepilogue(0xc820b028c0)
/usr/local/Cellar/go/1.6.2/libexec/src/cmd/compile/internal/gc/plive.go:1289 +0x3323 fp=0xc82084d708 sp=0xc82084d168
cmd/compile/internal/gc.liveness(0xc820518b40, 0xc820ba4360, 0xc820b17480, 0xc820b17500)
/usr/local/Cellar/go/1.6.2/libexec/src/cmd/compile/internal/gc/plive.go:1794 +0x334 fp=0xc82084d7e8 sp=0xc82084d708
cmd/compile/internal/gc.compile(0xc820518b40)
/usr/local/Cellar/go/1.6.2/libexec/src/cmd/compile/internal/gc/pgen.go:541 +0xdf2 fp=0xc82084da58 sp=0xc82084d7e8
cmd/compile/internal/gc.funccompile(0xc820518b40)
/usr/local/Cellar/go/1.6.2/libexec/src/cmd/compile/internal/gc/dcl.go:1450 +0x1c0 fp=0xc82084dad0 sp=0xc82084da58
cmd/compile/internal/gc.Main()
/usr/local/Cellar/go/1.6.2/libexec/src/cmd/compile/internal/gc/lex.go:472 +0x2116 fp=0xc82084ddf0 sp=0xc82084dad0
cmd/compile/internal/amd64.Main()
/usr/local/Cellar/go/1.6.2/libexec/src/cmd/compile/internal/amd64/galign.go:127 +0x58d fp=0xc82084de58 sp=0xc82084ddf0
main.main()
/usr/local/Cellar/go/1.6.2/libexec/src/cmd/compile/main.go:32 +0x395 fp=0xc82084df30 sp=0xc82084de58
runtime.main()
/usr/local/Cellar/go/1.6.2/libexec/src/runtime/proc.go:188 +0x2b0 fp=0xc82084df80 sp=0xc82084df30
runtime.goexit()
/usr/local/Cellar/go/1.6.2/libexec/src/runtime/asm_amd64.s:1998 +0x1 fp=0xc82084df88 sp=0xc82084df80

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