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runtime: fatal error: runtime: wrong goroutine in newstack #10645

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toffaletti opened this issue Apr 30, 2015 · 2 comments
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runtime: fatal error: runtime: wrong goroutine in newstack #10645

toffaletti opened this issue Apr 30, 2015 · 2 comments
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@toffaletti
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I was using Dmitry's go-fuzz and Ctrl-C left me with a runtime panic:

^C2015/04/30 00:35:15 shutting down...
runtime: newstack called from g=0xc208804fc0
    m=0xc20807e700 m->curg=0xc20812e7e0 m->g0=0xc2088050e0 m->gsignal=0xc208804fc0
runtime.onM(0xc208088e60)
    /usr/local/go/src/runtime/asm_amd64.s:235 +0x2f
runtime.morestackc()
    /usr/local/go/src/runtime/stack.c:885 +0x1e
runtime.sighandler(0x2, 0xc2080892d8, 0xc208089340, 0xc20812e7e0)
    /usr/local/go/src/runtime/signal_amd64x.c:44 +0x14
runtime.sigtramp(0x2dd, 0x0, 0x200000200000085, 0xc2086ffaa0, 0x5da6, 0xc20807e700, 0xc2080893f8, 0x1, 0x0, 0x0, ...)
    /usr/local/go/src/runtime/sys_darwin_amd64.s:229 +0x69
fatal error: runtime: wrong goroutine in newstack

runtime stack:
runtime.throw(0x5fb1d7)
    /usr/local/go/src/runtime/panic.go:491 +0xad
runtime.newstack()
    /usr/local/go/src/runtime/stack.c:710 +0x16b
runtime.morestack()
    /usr/local/go/src/runtime/asm_amd64.s:324 +0x7e

goroutine 15 [running]:

go version go1.4.2 darwin/amd64 on 10.10.3

I've only had this happen once in a couple days of use, so reproducing this might be a good use of the new stress tool.
@ianlancetaylor ianlancetaylor changed the title fatal error: runtime: wrong goroutine in newstack runtime: fatal error: runtime: wrong goroutine in newstack Jun 3, 2015
@ianlancetaylor ianlancetaylor added this to the Go1.5Maybe milestone Jun 3, 2015
@ianlancetaylor
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Does this happen with tip? Is it reproducible at all?

@toffaletti
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I haven't tried, will reopen if I ever encounter it again.

@golang golang locked and limited conversation to collaborators Jun 25, 2016
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