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cmd/compile: internal compiler error: missed typecheck #61908

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ALTree opened this issue Aug 9, 2023 · 3 comments
Closed

cmd/compile: internal compiler error: missed typecheck #61908

ALTree opened this issue Aug 9, 2023 · 3 comments
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compiler/runtime Issues related to the Go compiler and/or runtime. NeedsFix The path to resolution is known, but the work has not been done.
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@ALTree
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ALTree commented Aug 9, 2023

$ go version
go version go1.21.0 linux/amd64

$ gotip version
go version devel go1.22-a3ced4a Wed Aug 9 03:13:11 2023 +0000 linux/amd64
package p

func f(p []byte) int {
	switch "" < string(p) {
	case true:
		return 0
	default:
		return 1
	}
}
$ go build crash.go 

# command-line-arguments
./crash.go:4:12: internal compiler error: missed typecheck: 
.   LEN int # crash.go:4:12
.   .   NAME-p.p esc(no) Class:PPARAM Offset:0 OnStack Used SLICE-[]byte tc(1) # crash.go:3:8

cc @golang/compiler @cuonglm

@ALTree ALTree added the NeedsInvestigation Someone must examine and confirm this is a valid issue and not a duplicate of an existing one. label Aug 9, 2023
@gopherbot gopherbot added the compiler/runtime Issues related to the Go compiler and/or runtime. label Aug 9, 2023
@cuonglm cuonglm self-assigned this Aug 9, 2023
@cuonglm cuonglm added NeedsFix The path to resolution is known, but the work has not been done. and removed NeedsInvestigation Someone must examine and confirm this is a valid issue and not a duplicate of an existing one. labels Aug 9, 2023
@gopherbot
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Change https://go.dev/cl/517936 mentions this issue: cmd/compile: make backingArrayPtrLen to return typecheck-ed nodes

@cuonglm
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cuonglm commented Aug 9, 2023

@gopherbot Please backport this to go1.21

@gopherbot
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Backport issue(s) opened: #61909 (for 1.21).

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

@mknyszek mknyszek added this to the Go1.22 milestone Aug 9, 2023
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Labels
compiler/runtime Issues related to the Go compiler and/or runtime. NeedsFix The path to resolution is known, but the work has not been done.
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