Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

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

Closed
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

Comments

@ericlagergren
Copy link
Contributor

@ericlagergren ericlagergren commented Apr 7, 2019

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

This comment has been minimized.

Copy link
Contributor Author

@ericlagergren ericlagergren commented Apr 7, 2019

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

This comment has been minimized.

Copy link
Contributor

@agnivade agnivade commented Apr 7, 2019

Seems to be fixed at tip. Can you confirm ?

@ericlagergren

This comment has been minimized.

Copy link
Contributor Author

@ericlagergren ericlagergren commented Apr 7, 2019

Yup. Sorry, I thought it sounded like another issue (dupe) I'd read before, but couldn't find one that was similar enough.

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
Projects
None yet
Linked pull requests

Successfully merging a pull request may close this issue.

None yet
2 participants
You can’t perform that action at this time.