runtime: unexpected return pc for runtime.throw called from 0x3 on Ubuntu

[bep]

See gohugoio/hugo#10830 for more details.

• Test failure in GitHub actions test, ubuntu-latest and 1.20.x.
• I have seen this in all Go 1.20 version.
• I have not seen this in Go < 1.20
• I have only seen this on Ubuntu.
• It happens about 20% of the test runs.

Log Extract

signal SIGSEGV: segmentation violation code=0x2 addr=0x2498f12 pc=0x2981a20]

goroutine 13992 [running]:
runtime: g 13992: unexpected return pc for runtime.throw called from 0x3
stack: frame={sp:0x7f80e4efec90, fp:0x7f80e4efecc0} stack=[0xc001cab000,0xc001cac000)

runtime.throw({0x7f80e4efed08?, 0x549a1b?})
/opt/hostedtoolcache/go/1.20.2/x64/src/runtime/panic.go:1047 +0x5d fp=0x7f80e4efecc0 sp=0x7f80e4efec90 pc=0x51e41d
created by time.goFunc
/opt/hostedtoolcache/go/1.20.2/x64/src/time/sleep.go:176 +0x48

goroutine 1 [chan receive]:
runtime.gopark(0xc0003dd440?, 0xc001afaa30?, 0x55?, 0x9?, 0x5545ce?)
/opt/hostedtoolcache/go/1.20.2/x64/src/runtime/proc.go:381 +0xd6 fp=0xc0006bd620 sp=0xc0006bd600 pc=0x521156
runtime.chanrecv(0xc00004e690, 0x0, 0x1)
/opt/hostedtoolcache/go/1.20.2/x64/src/runtime/chan.go:583 +0x42e fp=0xc0006bd6b0 sp=0xc0006bd620 pc=0x4ed42e
runtime.chanrecv1(0xc000046660?, 0x0?)
/opt/hostedtoolcache/go/1.20.2/x64/src/runtime/chan.go:442 +0x18 fp=0xc0006bd6d8 sp=0xc0006bd6b0 pc=0x4ecf98
testing.tRunner.func1()
/opt/hostedtoolcache/go/1.20.2/x64/src/testing/testing.go:1542 +0x8eb fp=0xc0006bd8c0 sp=0xc0006bd6d8 pc=0x68d76b
runtime.deferreturn()
/opt/hostedtoolcache/go/1.20.2/x64/src/runtime/panic.go:476 +0x33 fp=0xc0006bd900 sp=0xc0006bd8c0 pc=0x51ce73
testing.tRunner(0xc00014c9c0, 0xc0005d7b48)
/opt/hostedtoolcache/go/1.20.2/x64/src/testing/testing.go:1582 +0x255 fp=0xc0006bda08 sp=0xc0006bd900 pc=0x68cd95
testing.runTests(0xc00060e8c0?, {0x51df0e0, 0x13a, 0x13a}, {0x1c?, 0x1e?, 0x53c31a0?})
/opt/hostedtoolcache/go/1.20.2/x64/src/testing/testing.go:2034 +0x87d fp=0xc0006bdb78 sp=0xc0006bda08 pc=0x691f7d
testing.(*M).Run(0xc00060e8c0)
/opt/hostedtoolcache/go/1.20.2/x64/src/testing/testing.go:1906 +0xb45 fp=0xc0006bded8 sp=0xc0006bdb78 pc=0x68f7e5
main.main()
_testmain.go:701 +0x2ea fp=0xc0006bdf80 sp=0xc0006bded8 pc=0x27dfc4a
runtime.main()
/opt/hostedtoolcache/go/1.20.2/x64/src/runtime/proc.go:250 +0x207 fp=0xc0006bdfe0 sp=0xc0006bdf80 pc=0x520d07
runtime.goexit()
/opt/hostedtoolcache/go/1.20.2/x64/src/runtime/asm_amd64.s:1598 +0x1 fp=0xc0006bdfe8 sp=0xc0006bdfe0 pc=0x5567a1

goroutine 2 [force gc (idle), 1 minutes]:
runtime.gopark(0x53c51c0?, 0x0?, 0x0?, 0x0?, 0x0?)
/opt/hostedtoolcache/go/1.20.2/x64/src/runtime/proc.go:381 +0xd6 fp=0xc00006c7b0 sp=0xc00006c790 pc=0x521156
runtime.goparkunlock(...)
/opt/hostedtoolcache/go/1.20.2/x64/src/runtime/proc.go:387
runtime.forcegchelper()
/opt/hostedtoolcache/go/1.20.2/x64/src/runtime/proc.go:305 +0xb0 fp=0xc00006c7e0 sp=0xc00006c7b0 pc=0x520f90
runtime.goexit()
/opt/hostedtoolcache/go/1.20.2/x64/src/runtime/asm_amd64.s:1598 +0x1 fp=0xc00006c7e8 sp=0xc00006c7e0 pc=0x5567a1
created by runtime.init.6
/opt/hostedtoolcache/go/1.20.2/x64/src/runtime/proc.go:293 +0x25

goroutine 3 [GC sweep wait]:
runtime.gopark(0x53c2901?, 0x53c2960?, 0xc?, 0x14?, 0x1?)
/opt/hostedtool

[cherrymui]

Could you share the information about the platform you're running on (architecture, environment, go env output)? Would it be possible to share a command that could reproduce this? Thanks.

runtime: g 13992: unexpected return pc for runtime.throw called from 0x3
stack: frame={sp:0x7f80e4efec90, fp:0x7f80e4efecc0} stack=[0xc001cab000,0xc001cac000)

Looks like the G and the stack doesn't match. Maybe it panics on the g0 stack and then throws?

[bep]

Go Env

GO111MODULE="on"
GOARCH="amd64"
GOBIN=""
GOCACHE="/home/runner/.cache/go-build"
GOENV="/home/runner/.config/go/env"
GOEXE=""
GOEXPERIMENT=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GOINSECURE=""
GOMODCACHE="/home/runner/go/pkg/mod"
GONOPROXY=""
GONOSUMDB=""
GOOS="linux"
GOPATH="/home/runner/go"
GOPRIVATE=""
GOPROXY="https://proxy.golang.org"
GOROOT="/opt/hostedtoolcache/go/1.[20](https://github.com/gohugoio/hugo/actions/runs/4415139076/jobs/7737725366#step:17:21).2/x64"
GOSUMDB="sum.golang.org"
GOTMPDIR=""
GOTOOLDIR="/opt/hostedtoolcache/go/1.20.2/x64/pkg/tool/linux_amd64"
GOVCS=""
GOVERSION="go1.20.2"
GCCGO="gccgo"
GOAMD64="v1"
AR="ar"
CC="gcc"
CXX="g++"
CGO_ENABLED="1"
GOMOD="/home/runner/work/hugo/hugo/go.mod"
GOWORK=""
CGO_CFLAGS="-O2 -g"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-O2 -g"
CGO_FFLAGS="-O2 -g"
CGO_LDFLAGS="-O2 -g"
PKG_CONFIG="pkg-config"
GOGCCFLAGS="-fPIC -m64 -pthread -Wl,--no-gc-sections -fmessage-length=0 -fdebug-prefix-map=/tmp/go-build1[29](https://github.com/gohugoio/hugo/actions/runs/4415139076/jobs/7737725366#step:17:30)20[40](https://github.com/gohugoio/hugo/actions/runs/4415139076/jobs/7737725366#step:17:41)891=/tmp/go-build -gno-record-gcc-switches"

This fails (most of the times):

git clone https://github.com/gohugoio/hugo.git
cd hugo
go test -count 6 -race ./... -tags extended

gohugoio/hugo#10833