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gccgo: crash on implicit duplicate array/slice index #28186

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go101 opened this issue Oct 13, 2018 · 3 comments
Closed

gccgo: crash on implicit duplicate array/slice index #28186

go101 opened this issue Oct 13, 2018 · 3 comments
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FrozenDueToAge NeedsFix The path to resolution is known, but the work has not been done.
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Gccgo

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@go101
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go101 commented Oct 13, 2018

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

$ gccgo --version
gccgo (Debian 8.2.0-7) 8.2.0

Does this issue reproduce with the latest release?

maybe

What did you do?

package main

var f = [...]bool{3: false, 2: true, true} // the implicit index for the third element is 3

func main() {
}

What did you expect to see?

report error without crashing

What did you see instead?

crash

$ go run -compiler=gccgo aa.go
# command-line-arguments
go1: internal compiler error: in output_constructor_regular_field, at varasm.c:5142
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-8/README.Bugs> for instructions.
@gopherbot gopherbot added this to the Gccgo milestone Oct 13, 2018
@mdcnz
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mdcnz commented Oct 15, 2018

Playground reports the error: prog.go:3:38: duplicate index in array literal: 3
https://play.golang.org/p/_fVK5DNyb2G

@ianlancetaylor ianlancetaylor added the NeedsFix The path to resolution is known, but the work has not been done. label Oct 15, 2018
@benshi001
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gccgo does crash with "gccgo aa.go", but doesn't with "gccgo aa.go -O2"

@gopherbot
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Change https://golang.org/cl/160832 mentions this issue: compiler: check duplicate implict indexes in slices/arrays

kraj pushed a commit to kraj/gcc that referenced this issue Feb 5, 2019
compiler: check duplicate implicit indexes in slices/arrays
8f2ebee 
    
    Fixes golang/go#28186.
    
    Reviewed-on: https://go-review.googlesource.com/c/160832


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@268554 138bc75d-0d04-0410-961f-82ee72b054a4
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