Closed
Description
What version of Go are you using (go version)?
$ go version go version go1.20.5 darwin/arm64
Does this issue reproduce with the latest release?
Yes, I saw it on the 1.21 rc version, too.
What operating system and processor architecture are you using (go env)?
go env Output
$ go env GO111MODULE="" GOARCH="arm64" GOBIN="" GOCACHE="/Users/*/Library/Caches/go-build" GOENV="/Users/*/Library/Application Support/go/env" GOEXE="" GOEXPERIMENT="" GOFLAGS="" GOHOSTARCH="arm64" GOHOSTOS="darwin" GOINSECURE="" GOMODCACHE="/Users/*/go/pkg/mod" GONOPROXY="" GONOSUMDB="" GOOS="darwin" GOPATH="/Users/*/go" GOPRIVATE="" GOPROXY="https://proxy.golang.org,direct" GOROOT="/usr/local/go" GOSUMDB="sum.golang.org" GOTMPDIR="" GOTOOLDIR="/usr/local/go/pkg/tool/darwin_arm64" GOVCS="" GOVERSION="go1.20.5" GCCGO="gccgo" AR="ar" CC="clang" CXX="clang++" CGO_ENABLED="1" GOMOD="/Users/*/*/*/master/go.mod" GOWORK="/Users/*/*/*/go.work" CGO_CFLAGS="-O2 -g" CGO_CPPFLAGS="" CGO_CXXFLAGS="-O2 -g" CGO_FFLAGS="-O2 -g" CGO_LDFLAGS="-O2 -g" PKG_CONFIG="pkg-config" GOGCCFLAGS="-fPIC -arch arm64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/jz/mf6cdns11jx9prqj65v8rjx40000gp/T/go-build2673756243=/tmp/go-build -gno-record-gcc-switches -fno-common"
What did you do?
I have a complicated code base so it is hard to pin down, but if I get a minimal repro I will update this issue. Within this code base, I have a 'hang' where execution abruptly stops because a function never returns but it also doesn't panic. I can print from a defer call at the top of a function call but not from the line after the function returns. When I attach a debugger, it ends at this line in panic.go:
if gp._defer != d {
throw("bad defer entry in panic")
}
After which I get no panic or stderr, execution just seems to stop. I do have a panic in a defer. When I fix it everything works fine.
What did you expect to see?
A panic, I think.
What did you see instead?
Nothing, a halt.