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cmd/compile: internal compiler error: 'main': not lowered #31315

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ericlagergren opened this issue Apr 7, 2019 · 3 comments
Closed

cmd/compile: internal compiler error: 'main': not lowered #31315

ericlagergren opened this issue Apr 7, 2019 · 3 comments
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FrozenDueToAge WaitingForInfo Issue is not actionable because of missing required information, which needs to be provided.

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@ericlagergren
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ericlagergren commented Apr 7, 2019 •
edited

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

1.12.2 (occurs with 1.12 and 1.12.1).

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

darwin/amd64

go env Output
$ go env
GOARCH="amd64"
GOBIN="/Users/ericlagergren/gopath/bin"
GOCACHE="/Users/ericlagergren/Library/Caches/go-build"
GOEXE=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="darwin"
GOOS="darwin"
GOPATH="/Users/ericlagergren/gopath"
GOPROXY=""
GORACE=""
GOROOT="/usr/local/go"
GOTMPDIR=""
GOTOOLDIR="/usr/local/go/pkg/tool/darwin_amd64"
GCCGO="gccgo"
CC="clang"
CXX="clang++"
CGO_ENABLED="1"
GOMOD="/dev/null"
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 -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/vp/6n5tkzt93_7cb22vrc0qd08r0000gn/T/go-build366116268=/tmp/go-build -gno-record-gcc-switches -fno-common"

What did you do?

$ cat x.go
package main

import (
	"fmt"
	"math/bits"
)

func main() {
	fmt.Println(bits.Sub(4, 100, 0))
}

The bug is a bit different on the playground:

https://play.golang.org/p/UmLdx0JeZHN

What did you expect to see?

18446744073709551520 1

What did you see instead?

# command-line-arguments
<unknown line number>: internal compiler error: 'main': not lowered: v19, Store SSA PTR UINT64 SSA

Please file a bug report including a short program that triggers the error.
https://golang.org/issue/new
@ericlagergren
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ericlagergren commented Apr 7, 2019 •
edited

These does not reproduce the error:

func main() {
	x, c := bits.Sub(4, 100, 0)
	fmt.Println(x, c)
}

func main() {
	fmt.Println(bits.OnesCount(4))
}

func main() {
	fmt.Println(MySub(4, 100, 0)) // MySub is a copy + pasted bits.Sub
}

@agnivade
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agnivade commented Apr 7, 2019

Seems to be fixed at tip. Can you confirm ?

@agnivade agnivade added the WaitingForInfo Issue is not actionable because of missing required information, which needs to be provided. label Apr 7, 2019
@ericlagergren
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Yup. Sorry, I thought it sounded like another issue (dupe) I'd read before, but couldn't find one that was similar enough.

@golang golang locked and limited conversation to collaborators Apr 6, 2020
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@agnivade @ericlagergren @gopherbot