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gccgo: internal compiler error: Segmentation fault #22305

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ALTree opened this issue Oct 17, 2017 · 3 comments
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gccgo: internal compiler error: Segmentation fault #22305

ALTree opened this issue Oct 17, 2017 · 3 comments
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@ALTree
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ALTree commented Oct 17, 2017 •
edited 

$ gccgo --version
gccgo (GCC) 7.2.0

The following program (reduced from a gosmith-generated one):

package main

var F func() [0]func()
var i = 2
var B = F()[i]

func main() {}

crashes gccgo-7.2.0 with the following error

$ gccgo 0.go 
go1: internal compiler error: Segmentation fault
0xa5192f crash_signal
	../../gcc-7.2.0/gcc/toplev.c:337
0x639504 Gcc_backend::convert_expression(Btype*, Bexpression*, Location)
	../../gcc-7.2.0/gcc/go/go-gcc.cc:1459
0x621acb Type_conversion_expression::do_get_backend(Translate_context*)
	../../gcc-7.2.0/gcc/go/gofrontend/expressions.cc:3485
0x645db8 Variable::get_init(Gogo*, Named_object*)
	../../gcc-7.2.0/gcc/go/gofrontend/gogo.cc:6601
0x65a001 Gogo::write_globals()
	../../gcc-7.2.0/gcc/go/gofrontend/gogo.cc:1370

The crash is reproducible on gccgo tip.
@ALTree ALTree added this to the Gccgo milestone Oct 17, 2017
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ALTree commented Oct 17, 2017

cc @ianlancetaylor

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Change https://golang.org/cl/91556 mentions this issue: test: add new test that gccgo failed to compile

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Fixed by https://gcc.gnu.org/ml/gcc-patches/2018-02/msg00105.html .

gopherbot pushed a commit that referenced this issue Feb 15, 2018
@ianlancetaylor @bradfitz
test: add new test that gccgo failed to compile
0849dfd 
Updates #22305

Change-Id: I0e6bbd880599fc1b70d0378b746d162d4a846c65
Reviewed-on: https://go-review.googlesource.com/91556
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
@ALTree ALTree mentioned this issue Feb 16, 2018
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