Currently trying out Google Cloud with Go, and I'm having the most bizarre issue I have ever seen.
I have made an ultra simple "hello world" app that just prints out some text to the browser. It compiles perfectly with "go build", and even deploys to Google Cloud and runs there just fine, but when I use "goapp serve" to run it locally it randomly crashes when I start it, with a huge stack trace and the message:
fatal error: unexpected signal during runtime execution
[signal 0xb code=0x1 addr=0xb01dfacedebac1e pc=0xf47b]
When I get the error, I simply run "goapp serve" again, and after a few tries it somehow magically decides to work. Other times, if I can't get it to run after 10-20 tries, I simply make a micro change in the code somewhere, like editing a string, changing a single character, and then it runs just fine locally. Whaaaaat!?!?!?
I'm so baffled how this is even possible. I seems that "goapp serve" is extremely fragile. It's Google official local development server, so I would expect it to be a little more stable, or at least give some more human readable clues.
I have searched all over and can't find anything related to this.
Any ideas how or what is causing this?
Here is the stack trace:
ERROR go_runtime.py:181] Failed to build Go application: (Executed command: /usr/local/go_appengine/goroot/bin/go-app-builder -app_base /Users/kieran/Go/src/hello/main -arch 6 -dynamic -goroot /usr/local/go_appengine/goroot -nobuild_files ^^$ -unsafe -gopath /Users/kieran/Go -binary_name _go_app -extra_imports appengine_internal/init -work_dir /var/folders/w3/wrcy8wfn3gzbnphs0cq6yw9r0000gn/T/tmpf_Nrsvappengine-go-bin -gcflags -I,/usr/local/go_appengine/goroot/pkg/darwin_amd64_appengine -ldflags -L,/usr/local/go_appengine/goroot/pkg/darwin_amd64_appengine main.go)
fatal error: unexpected signal during runtime execution
[signal 0xb code=0x1 addr=0xb01dfacedebac1e pc=0xf47b]
runtime stack:
runtime.throw(0x2c4ac0, 0x2a)
/private/var/folders/9y/ppk2fnqj5lscwqw_l6lhdrx8005bt1/T/appengine/go_appengine/goroot/src/runtime/panic.go:547 +0x90
runtime.sigpanic()
/private/var/folders/9y/ppk2fnqj5lscwqw_l6lhdrx8005bt1/T/appengine/go_appengine/goroot/src/runtime/sigpanic_unix.go:12 +0x5a
runtime.unlock(0x3aa0c0)
/private/var/folders/9y/ppk2fnqj5lscwqw_l6lhdrx8005bt1/T/appengine/go_appengine/goroot/src/runtime/lock_sema.go:107 +0x14b
runtime.(*mheap).alloc_m(0x3aa0c0, 0x1, 0x20000000020, 0x8a5178)
/private/var/folders/9y/ppk2fnqj5lscwqw_l6lhdrx8005bt1/T/appengine/go_appengine/goroot/src/runtime/mheap.go:492 +0x314
runtime.(*mheap).alloc.func1()
/private/var/folders/9y/ppk2fnqj5lscwqw_l6lhdrx8005bt1/T/appengine/go_appengine/goroot/src/runtime/mheap.go:502 +0x41
runtime.systemstack(0xc820039e58)
/private/var/folders/9y/ppk2fnqj5lscwqw_l6lhdrx8005bt1/T/appengine/go_appengine/goroot/src/runtime/asm_amd64.s:307 +0xab
runtime.(*mheap).alloc(0x3aa0c0, 0x1, 0x10000000020, 0xf11f)
/private/var/folders/9y/ppk2fnqj5lscwqw_l6lhdrx8005bt1/T/appengine/go_appengine/goroot/src/runtime/mheap.go:503 +0x63
runtime.(*mcentral).grow(0x3ac190, 0x0)
/private/var/folders/9y/ppk2fnqj5lscwqw_l6lhdrx8005bt1/T/appengine/go_appengine/goroot/src/runtime/mcentral.go:209 +0x93
runtime.(*mcentral).cacheSpan(0x3ac190, 0x8a5178)
/private/var/folders/9y/ppk2fnqj5lscwqw_l6lhdrx8005bt1/T/appengine/go_appengine/goroot/src/runtime/mcentral.go:89 +0x47d
runtime.(*mcache).refill(0x406c20, 0x20, 0x8a5178)
/private/var/folders/9y/ppk2fnqj5lscwqw_l6lhdrx8005bt1/T/appengine/go_appengine/goroot/src/runtime/mcache.go:119 +0xcc
runtime.mallocgc.func2()
/private/var/folders/9y/ppk2fnqj5lscwqw_l6lhdrx8005bt1/T/appengine/go_appengine/goroot/src/runtime/malloc.go:642 +0x2b
runtime.systemstack(0xc820012000)
/private/var/folders/9y/ppk2fnqj5lscwqw_l6lhdrx8005bt1/T/appengine/go_appengine/goroot/src/runtime/asm_amd64.s:291 +0x79
runtime.mstart()
/private/var/folders/9y/ppk2fnqj5lscwqw_l6lhdrx8005bt1/T/appengine/go_appengine/goroot/src/runtime/proc.go:1051
goroutine 1 [running]:
runtime.systemstack_switch()
/private/var/folders/9y/ppk2fnqj5lscwqw_l6lhdrx8005bt1/T/appengine/go_appengine/goroot/src/runtime/asm_amd64.s:245 fp=0xc8200329d0 sp=0xc8200329c8
runtime.mallocgc(0x480, 0x25c640, 0xc800000000, 0xc820074240)
/private/var/folders/9y/ppk2fnqj5lscwqw_l6lhdrx8005bt1/T/appengine/go_appengine/goroot/src/runtime/malloc.go:643 +0x869 fp=0xc820032aa8 sp=0xc8200329d0
runtime.newarray(0x25c640, 0x18, 0x152be8)
/private/var/folders/9y/ppk2fnqj5lscwqw_l6lhdrx8005bt1/T/appengine/go_appengine/goroot/src/runtime/malloc.go:798 +0xc9 fp=0xc820032ae8 sp=0xc820032aa8
runtime.makeslice(0x1e6920, 0x18, 0x18, 0x0, 0x0, 0x0)
/private/var/folders/9y/ppk2fnqj5lscwqw_l6lhdrx8005bt1/T/appengine/go_appengine/goroot/src/runtime/slice.go:32 +0x165 fp=0xc820032b38 sp=0xc820032ae8
cmd/link/internal/ld.readsym(0xc820074240, 0xc825a9e1a0, 0xc821107850, 0x8, 0xc821ecb360, 0x4c)
/private/var/folders/9y/ppk2fnqj5lscwqw_l6lhdrx8005bt1/T/appengine/go_appengine/goroot/src/cmd/link/internal/ld/objfile.go:239 +0xba6 fp=0xc820032f80 sp=0xc820032b38
cmd/link/internal/ld.ldobjfile(0xc820074240, 0xc825a9e1a0, 0xc821107850, 0x8, 0xbf902, 0xc821ecb360, 0x4c)
/private/var/folders/9y/ppk2fnqj5lscwqw_l6lhdrx8005bt1/T/appengine/go_appengine/goroot/src/cmd/link/internal/ld/objfile.go:147 +0xa62 fp=0xc820033190 sp=0xc820032f80
cmd/link/internal/ld.ldobj(0xc825a9e1a0, 0xc821107850, 0x8, 0xbf93e, 0xc821ecb360, 0x4c, 0xc82326a050, 0x44, 0x1, 0x0)
/private/var/folders/9y/ppk2fnqj5lscwqw_l6lhdrx8005bt1/T/appengine/go_appengine/goroot/src/cmd/link/internal/ld/lib.go:1351 +0x1569 fp=0xc820033400 sp=0xc820033190
cmd/link/internal/ld.objfile(0xc82409ce70)
/private/var/folders/9y/ppk2fnqj5lscwqw_l6lhdrx8005bt1/T/appengine/go_appengine/goroot/src/cmd/link/internal/ld/lib.go:847 +0x10d9 fp=0xc820033710 sp=0xc820033400
cmd/link/internal/ld.loadlib()
/private/var/folders/9y/ppk2fnqj5lscwqw_l6lhdrx8005bt1/T/appengine/go_appengine/goroot/src/cmd/link/internal/ld/lib.go:513 +0x5ce fp=0xc8200339f0 sp=0xc820033710
cmd/link/internal/ld.Ldmain()
/private/var/folders/9y/ppk2fnqj5lscwqw_l6lhdrx8005bt1/T/appengine/go_appengine/goroot/src/cmd/link/internal/ld/pobj.go:214 +0x1cd3 fp=0xc820033e70 sp=0xc8200339f0
cmd/link/internal/amd64.Main()
/private/var/folders/9y/ppk2fnqj5lscwqw_l6lhdrx8005bt1/T/appengine/go_appengine/goroot/src/cmd/link/internal/amd64/obj.go:44 +0x19 fp=0xc820033e78 sp=0xc820033e70
main.main()
/private/var/folders/9y/ppk2fnqj5lscwqw_l6lhdrx8005bt1/T/appengine/go_appengine/goroot/src/cmd/link/main.go:27 +0x36f fp=0xc820033f50 sp=0xc820033e78
runtime.main()
/private/var/folders/9y/ppk2fnqj5lscwqw_l6lhdrx8005bt1/T/appengine/go_appengine/goroot/src/runtime/proc.go:188 +0x2b0 fp=0xc820033fa0 sp=0xc820033f50
runtime.goexit()
/private/var/folders/9y/ppk2fnqj5lscwqw_l6lhdrx8005bt1/T/appengine/go_appengine/goroot/src/runtime/asm_amd64.s:1998 +0x1 fp=0xc820033fa8 sp=0xc820033fa0