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cmd/compile: incorrect inline function variable #59572

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wdvxdr1123 opened this issue Apr 12, 2023 · 4 comments
Closed

cmd/compile: incorrect inline function variable #59572

wdvxdr1123 opened this issue Apr 12, 2023 · 4 comments
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@wdvxdr1123
Labels
compiler/runtime Issues related to the Go compiler and/or runtime. FrozenDueToAge NeedsFix The path to resolution is known, but the work has not been done.
Milestone
Go1.21

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@wdvxdr1123
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What version of Go are you using (go version)?

$ go version
go version go1.20.1 darwin/amd64

Does this issue reproduce with the latest release?

Yes

What did you do?

package main

func foo() {
	println("foo")
}

func main() {
	fn := foo
	for _, fn = range list {
		fn()
	}
}

var list = []func(){
	func() {
		println("1")
	},
	func() {
		println("2")
	},
	func() {
		println("3")
	},
}

https://go.dev/play/p/gJSSO8xRwyl

What did you expect to see?

output

1
2
3

What did you see instead?

output

foo
foo
foo

go run -gcflags='-m=1' a.go
# command-line-arguments
./a.go:3:6: can inline foo
./a.go:7:6: can inline main
./a.go:10:5: inlining call to foo
./a.go:15:2: can inline glob..func1
./a.go:18:2: can inline glob..func2
./a.go:21:2: can inline glob..func3

I'll send a CL to fix soon.
@gopherbot gopherbot added the compiler/runtime Issues related to the Go compiler and/or runtime. label Apr 12, 2023
@gopherbot
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Change https://go.dev/cl/483855 mentions this issue: cmd/compile: fix ir.StaticValue for ORANGE

@randall77
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@gopherbot please open backport issues. This is a bad miscompilation.

This was referenced Apr 12, 2023
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@gopherbot
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Backport issue(s) opened: #59579 (for 1.19), #59580 (for 1.20).

Remember to create the cherry-pick CL(s) as soon as the patch is submitted to master, according to https://go.dev/wiki/MinorReleases.

@ianlancetaylor
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Works in Go 1.15, broken since then. Works in gccgo.

@mknyszek mknyszek modified the milestones: Backlog, Go1.21 Apr 12, 2023
@mknyszek mknyszek added the NeedsFix The path to resolution is known, but the work has not been done. label Apr 12, 2023
@golang golang locked and limited conversation to collaborators Apr 11, 2024
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@wdvxdr1123 wdvxdr1123

Labels
compiler/runtime Issues related to the Go compiler and/or runtime. FrozenDueToAge NeedsFix The path to resolution is known, but the work has not been done.
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Milestone
Go1.21
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5 participants
@mknyszek @ianlancetaylor @randall77 @gopherbot @wdvxdr1123