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cmd/compile: internal compiler error: assertion failed #66132

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karelbilek opened this issue Mar 6, 2024 · 2 comments
Closed

cmd/compile: internal compiler error: assertion failed #66132

karelbilek opened this issue Mar 6, 2024 · 2 comments
Labels
compiler/runtime Issues related to the Go compiler and/or runtime.

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@karelbilek
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Go version

go version go1.22.0 darwin/arm64

Output of go env in your module/workspace:

GO111MODULE=''
GOARCH='arm64'
GOBIN=''
GOCACHE='/Users/karelbilek/Library/Caches/go-build'
GOENV='/Users/karelbilek/Library/Application Support/go/env'
GOEXE=''
GOEXPERIMENT=''
GOFLAGS=''
GOHOSTARCH='arm64'
GOHOSTOS='darwin'
GOINSECURE=''
GOMODCACHE='/Users/karelbilek/go/pkg/mod'
GONOPROXY=''
GONOSUMDB=''
GOOS='darwin'
GOPATH='/Users/karelbilek/go'
GOPRIVATE=''
GOPROXY='https://proxy.golang.org,direct'
GOROOT='/usr/local/go'
GOSUMDB='sum.golang.org'
GOTMPDIR=''
GOTOOLCHAIN='auto'
GOTOOLDIR='/usr/local/go/pkg/tool/darwin_arm64'
GOVCS=''
GOVERSION='go1.22.0'
GCCGO='gccgo'
AR='ar'
CC='clang'
CXX='clang++'
CGO_ENABLED='1'
GOMOD='/Users/karelbilek/pstopdfa-gs-wazero/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 -arch arm64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -ffile-prefix-map=/var/folders/qk/9bbz1shn0dj8vdkg4lf76clh0000gn/T/go-build3538269826=/tmp/go-build -gno-record-gcc-switches -fno-common'

What did you do?

Small repro:

package main

func main() {
}

func SomeFunc() (map[string]int, error) {
	panic("foo")

	arr := []string{}

	mapp := map[string]int{}

LABEL:
	for _, f := range arr {
		continue LABEL
		mapp[f] = 2
	}

	return mapp, nil
}

Replicable here.

https://go.dev/play/p/fLjUPRVQ90v

Note that all is needed:

  1. the panic("foo")
  2. the labeled for loop (removing the label removes the issue)
  3. the mapp variable

What did you see happen?

CLOSURE [prog.go:14:20:var arr []string ./prog.go:16:3:var mapp map[string]int]
<unknown line number>: internal compiler error: assertion failed

Please file a bug report including a short program that triggers the error.
https://go.dev/issue/new

See playground.

What did you expect to see?

This should build sucessfully.

The code itself is dumb and is just the smallest repro I can do.

go1.21 works on the same codebase (go vet warns, but that's expected).
@karelbilek karelbilek changed the title internal compiler error: assertion failed cmd/compile: internal compiler error: assertion failed Mar 6, 2024
@gopherbot gopherbot added the compiler/runtime Issues related to the Go compiler and/or runtime. label Mar 6, 2024
@thanm
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thanm commented Mar 6, 2024

Thanks for the report.

This looks like a duplicate of #65593, which is now fixed on tip.

@thanm
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thanm commented Mar 6, 2024

Dup of #65593

@thanm thanm closed this as completed Mar 6, 2024
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@karelbilek @gopherbot @thanm