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cmd/compile: internal compiler error: panic: unification reached recursion depth limit #57800

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icholy opened this issue Jan 14, 2023 · 1 comment
Closed

cmd/compile: internal compiler error: panic: unification reached recursion depth limit #57800

icholy opened this issue Jan 14, 2023 · 1 comment
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compiler/runtime Issues related to the Go compiler and/or runtime. FrozenDueToAge

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@icholy
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icholy commented Jan 14, 2023 •
edited

What version of Go are you using (go version)?

$ go version
go version go1.19.5 linux/amd64

Does this issue reproduce with the latest release?

Yes.

What operating system and processor architecture are you using (go env)?

go env Output
$ go env
GO111MODULE=""
GOARCH="amd64"
GOBIN=""
GOCACHE="/home/icholy/.cache/go-build"
GOENV="/home/icholy/.config/go/env"
GOEXE=""
GOEXPERIMENT=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GOINSECURE=""
GOMODCACHE="/home/icholy/go/pkg/mod"
GONOPROXY=""
GONOSUMDB=""
GOOS="linux"
GOPATH="/home/icholy/go"
GOPRIVATE=""
GOPROXY="https://proxy.golang.org,direct"
GOROOT="/usr/local/go"
GOSUMDB="sum.golang.org"
GOTMPDIR=""
GOTOOLDIR="/usr/local/go/pkg/tool/linux_amd64"
GOVCS=""
GOVERSION="go1.19.5"
GCCGO="gccgo"
GOAMD64="v1"
AR="ar"
CC="gcc"
CXX="g++"
CGO_ENABLED="1"
GOMOD="/home/icholy/src/github.com/icholy/exp/go.mod"
GOWORK=""
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"
PKG_CONFIG="pkg-config"
GOGCCFLAGS="-fPIC -m64 -pthread -Wl,--no-gc-sections -fmessage-length=0 -fdebug-prefix-map=/tmp/go-build590854279=/tmp/go-build -gno-record-gcc-switches"
GOROOT/bin/go version: go version go1.19.5 linux/amd64
GOROOT/bin/go tool compile -V: compile version go1.19.5
uname -sr: Linux 5.15.0-58-generic
Distributor ID:	Ubuntu
Description:	Ubuntu 20.04.5 LTS
Release:	20.04
Codename:	focal
/lib/x86_64-linux-gnu/libc.so.6: GNU C Library (Ubuntu GLIBC 2.31-0ubuntu9.9) stable release version 2.31.
lldb --version: lldb version 10.0.0 (git@github.com:apple/llvm-project.git revision c315411fac10439aa7a09dce976b5716af9f149c)
Swift version 5.5.2 (swift-5.5.2-RELEASE)
gdb --version: GNU gdb (Ubuntu 9.2-0ubuntu1~20.04.1) 9.2

What did you do?

package main

func A[T any, C ~chan T](chans []C) {
	for _, b := range B(chans) {
		go func() {
			A(b)
		}()
	}
}

func B[T any](s []T) [][]T {
	return nil
}

https://go.dev/play/p/1PHqJVMq1ny

What did you expect to see?

No internal compiler error.

What did you see instead?

<unknown line number>: internal compiler error: panic: unification reached recursion depth limit

Please file a bug report including a short program that triggers the error.
https://go.dev/issue/new
@gopherbot gopherbot added the compiler/runtime Issues related to the Go compiler and/or runtime. label Jan 14, 2023
@seankhliao
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fixed on 1.20 / tip

@golang golang locked and limited conversation to collaborators Jan 14, 2024
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@icholy @gopherbot @seankhliao