runtime: copystack: no locals info for runtime.sigtramp

[bradfitz]

windows-amd64 at 30464457233e:
http://build.golang.org/log/3496bb34f76837ae657a2f1d08691f30f734a360

# ..\misc\cgo\test
runtime: copystack: no locals info for runtime.sigtramp
fatal error: split stack not allowed

runtime stack:
runtime.gothrow(0x6ccd87, 0x17)
    c:/go/src/pkg/runtime/panic1.go:161 +0xaa fp=0x2e8fc60 sp=0x2e8fc48
runtime.throw(0x6ccd87)
    c:/go/src/pkg/runtime/panic1.go:150 +0x50 fp=0x2e8fc90 sp=0x2e8fc60
runtime.newstack()
    c:/go/src/pkg/runtime/stack.c:1010 +0x74f fp=0x2e8fdd0 sp=0x2e8fc90
runtime.morestack()
    c:/go/src/pkg/runtime/asm_amd64.s:306 +0x73 fp=0x2e8fdd8 sp=0x2e8fdd0

goroutine 17 [stack growth, locked to thread]:
runtime.sighandler(0xc082021cf0, 0xc082021800, 0xc082016640, 0x0)
    c:/go/src/pkg/runtime/os_windows_amd64.c:41 fp=0xc082021040 sp=0xc082021038
----- exception handler -----
runtime: unknown pc 0x0 after exception handler
panic during panic
[signal 0xc0000005 code=0x0 addr=0x14 pc=0x415b89]

runtime stack:
runtime.startpanic_m()
    c:/go/src/pkg/runtime/panic.c:132 +0x12a fp=0x2e8f920 sp=0x2e8f900
runtime.onM(0x605378)
    c:/go/src/pkg/runtime/asm_amd64.s:256 +0xaa fp=0x2e8f928 sp=0x2e8f920
runtime.startpanic()
    c:/go/src/pkg/runtime/panic1.go:136 +0x30 fp=0x2e8f938 sp=0x2e8f928
runtime.gothrow(0x6caf8b, 0x2a)
    c:/go/src/pkg/runtime/panic1.go:158 +0x51 fp=0x2e8f950 sp=0x2e8f938
runtime.throw(0x6caf8b)
    c:/go/src/pkg/runtime/panic1.go:150 +0x50 fp=0x2e8f980 sp=0x2e8f950
runtime.sigpanic()
    c:/go/src/pkg/runtime/os_windows.c:454 +0x52 fp=0x2e8f998 sp=0x2e8f980
runtime.funcspdelta(0x0, 0x0, 0xc082016640)
    c:/go/src/pkg/runtime/symtab.go:225 +0x29 fp=0x2e8f9d0 sp=0x2e8f998
runtime.gentraceback(0x4282a0, 0xc082021038, 0x0, 0xc082016640, 0x0, 0x0, 0x64, 0x0,
0x0, 0x6ccb00, ...)
    c:/go/src/pkg/runtime/traceback.go:162 +0x8d6 fp=0x2e8faf0 sp=0x2e8f9d0
runtime.traceback(0xffffffffffffffff, 0xffffffffffffffff, 0x0, 0xc082016640)
    c:/go/src/pkg/runtime/traceback.go:491 +0xb5 fp=0x2e8fb50 sp=0x2e8faf0
runtime.tracebackothers(0xc082016500)
    c:/go/src/pkg/runtime/traceback.go:609 +0xbd fp=0x2e8fbc8 sp=0x2e8fb50
runtime.dopanic_m()
    c:/go/src/pkg/runtime/panic.c:173 +0x195 fp=0x2e8fc18 sp=0x2e8fbc8
runtime.onM(0x605208)
    c:/go/src/pkg/runtime/asm_amd64.s:256 +0xaa fp=0x2e8fc20 sp=0x2e8fc18
runtime.dopanic(0x0)
    c:/go/src/pkg/runtime/panic1.go:145 +0x96 fp=0x2e8fc48 sp=0x2e8fc20
runtime.gothrow(0x6ccd87, 0x17)
    c:/go/src/pkg/runtime/panic1.go:160 +0xaa fp=0x2e8fc60 sp=0x2e8fc48
runtime.throw(0x6ccd87)
    c:/go/src/pkg/runtime/panic1.go:150 +0x50 fp=0x2e8fc90 sp=0x2e8fc60
runtime.newstack()
    c:/go/src/pkg/runtime/stack.c:1010 +0x74f fp=0x2e8fdd0 sp=0x2e8fc90
runtime.morestack()
    c:/go/src/pkg/runtime/asm_amd64.s:306 +0x73 fp=0x2e8fdd8 sp=0x2e8fdd0
scatter = 00000000005293A0
hello from C
FAIL    _/c_/gobuilder/windows-amd64-30464457233e/go/misc/cgo/test  1.291s
Build complete, duration 2m3.9104464s. Result: error: exit status 1

[bradfitz]

Comment 1:

Actually this is the wrong bug I meant to report. This one was fixed by:
runtime: disable StackCopyAlways
https://code.google.com/p/go/source/detail?r=c9c8b336ffc
There was a scarier Windows one awhile back, but the dashboard has cleared it back to
"ok" because subrepo updates cause the main tool to rebuild, which can make fails turn
back to ok.  (That is issue #8646)

Status changed to Retracted.