You must upgrade to go1.7rc6 or later.

On Thu, 11 Aug 2016, 20:29 Mohammad Gufran notifications@github.com wrote:

What version of Go are you using (go version)?
go1.6.2 darwin/amd64
2.

What operating system and processor architecture are you using (go env
)?

→ go env
GOARCH="amd64"
GOBIN=""
GOEXE=""
GOHOSTARCH="amd64"
GOHOSTOS="darwin"
GOOS="darwin"
GOPATH="/Users/Gufran/Workspace/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"

What did you do?
Run go build on any valid go program.
2.

What did you expect to see?
Build finished successfully and an executable binary produced.
3.

What did you see instead?

Sometimes

→ go build main.go

command-line-arguments

fatal error: unexpected signal during runtime execution
[signal 0xb code=0x1 addr=0xdcbaa08fdee pc=0xf47b]

runtime stack:
runtime.throw(0x2c4920, 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(0x3a70a0)
/usr/local/Cellar/go/1.6.2/libexec/src/runtime/lock_sema.go:107 +0x14b
runtime.(_mheap).alloc_m(0x3a70a0, 0x1, 0x15, 0x5b7968)
/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(0x7fff5fbfea38)
/usr/local/Cellar/go/1.6.2/libexec/src/runtime/asm_amd64.s:307 +0xab
runtime.(_mheap).alloc(0x3a70a0, 0x1, 0x10000000015, 0xf11f)
/usr/local/Cellar/go/1.6.2/libexec/src/runtime/mheap.go:503 +0x63
runtime.(_mcentral).grow(0x3a8ca0, 0x0)
/usr/local/Cellar/go/1.6.2/libexec/src/runtime/mcentral.go:209 +0x93
runtime.(_mcentral).cacheSpan(0x3a8ca0, 0x5b7968)
/usr/local/Cellar/go/1.6.2/libexec/src/runtime/mcentral.go:89 +0x47d
runtime.(_mcache).refill(0x4032c0, 0xc800000015, 0x5b7968)
/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(0x3a0700)
/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=0xc8200429d0 sp=0xc8200429c8
runtime.mallocgc(0x180, 0x25c4c0, 0xc800000000, 0xc820084240)
/usr/local/Cellar/go/1.6.2/libexec/src/runtime/malloc.go:643 +0x869 fp=0xc820042aa8 sp=0xc8200429d0
runtime.newarray(0x25c4c0, 0x8, 0x152a58)
/usr/local/Cellar/go/1.6.2/libexec/src/runtime/malloc.go:798 +0xc9 fp=0xc820042ae8 sp=0xc820042aa8
runtime.makeslice(0x1e67a0, 0x8, 0x8, 0x0, 0x0, 0x0)
/usr/local/Cellar/go/1.6.2/libexec/src/runtime/slice.go:32 +0x165 fp=0xc820042b38 sp=0xc820042ae8
cmd/link/internal/ld.readsym(0xc820084240, 0xc8220dc0e0, 0xc820949756, 0x4, 0xc8220153b0, 0x42)
/usr/local/Cellar/go/1.6.2/libexec/src/cmd/link/internal/ld/objfile.go:239 +0xba6 fp=0xc820042f80 sp=0xc820042b38
cmd/link/internal/ld.ldobjfile(0xc820084240, 0xc8220dc0e0, 0xc820949756, 0x4, 0x1b364, 0xc8220153b0, 0x42)
/usr/local/Cellar/go/1.6.2/libexec/src/cmd/link/internal/ld/objfile.go:147 +0xa62 fp=0xc820043190 sp=0xc820042f80
cmd/link/internal/ld.ldobj(0xc8220dc0e0, 0xc820949756, 0x4, 0x1b38d, 0xc8220153b0, 0x42, 0xc820df4ac0, 0x3a, 0x1, 0x0)
/usr/local/Cellar/go/1.6.2/libexec/src/cmd/link/internal/ld/lib.go:1351 +0x1569 fp=0xc820043400 sp=0xc820043190
cmd/link/internal/ld.objfile(0xc820d8b650)
/usr/local/Cellar/go/1.6.2/libexec/src/cmd/link/internal/ld/lib.go:847 +0x10d9 fp=0xc820043710 sp=0xc820043400
cmd/link/internal/ld.loadlib()
/usr/local/Cellar/go/1.6.2/libexec/src/cmd/link/internal/ld/lib.go:513 +0x5ce fp=0xc8200439f0 sp=0xc820043710
cmd/link/internal/ld.Ldmain()
/usr/local/Cellar/go/1.6.2/libexec/src/cmd/link/internal/ld/pobj.go:214 +0x1cd3 fp=0xc820043e70 sp=0xc8200439f0
cmd/link/internal/amd64.Main()
/usr/local/Cellar/go/1.6.2/libexec/src/cmd/link/internal/amd64/obj.go:44 +0x19 fp=0xc820043e78 sp=0xc820043e70
main.main()
/usr/local/Cellar/go/1.6.2/libexec/src/cmd/link/main.go:27 +0x36f fp=0xc820043f50 sp=0xc820043e78
runtime.main()
/usr/local/Cellar/go/1.6.2/libexec/src/runtime/proc.go:188 +0x2b0 fp=0xc820043fa0 sp=0xc820043f50
runtime.goexit()
/usr/local/Cellar/go/1.6.2/libexec/src/runtime/asm_amd64.s:1998 +0x1 fp=0xc820043fa8 sp=0xc820043fa0

and sometimes

→ go build main.go
go build command-line-arguments: /usr/local/Cellar/go/1.6.2/libexec/pkg/tool/darwin_amd64/link: signal: segmentation fault

Both of these errors appear at random, I wasn't able to replicate them
reliably. As far as I know, repeatedly running go build will crash a few
times.

I updated to OS X Sierra about 12 hours ago and this issue started after
than, before the upgrade everything was working perfectly fine.
I am going to purge my current Go installation and reinstall again, if the
issue persist I'll update the thread.

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.

Dup of #16352, #16272, etc.