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gccgo: segmentation fault (2) #11536

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dvyukov opened this issue Jul 2, 2015 · 2 comments
Closed

gccgo: segmentation fault (2) #11536

dvyukov opened this issue Jul 2, 2015 · 2 comments
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@dvyukov
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dvyukov commented Jul 2, 2015

gccgo crashes on the following input:

package a
const (d rune=(V/V)
V
go1: internal compiler error: Segmentation fault
0xb4170f crash_signal
    ../../gcc/toplev.c:360
0x5eb0d4 Binary_expression::do_get_backend(Translate_context*)
    ../../gcc/go/gofrontend/expressions.cc:5756
0x5f431d Const_expression::do_get_backend(Translate_context*)
    ../../gcc/go/gofrontend/expressions.cc:2864
0x619571 Named_constant::get_backend(Gogo*, Named_object*)
    ../../gcc/go/gofrontend/gogo.cc:6621
0x620726 Named_object::get_backend(Gogo*, std::vector<Bexpression*, std::allocator<Bexpression*> >&, std::vector<Btype*, std::allocator<Btype*> >&, std::vector<Bfunction*, std::allocator<Bfunction*> >&)
    ../../gcc/go/gofrontend/gogo.cc:7091
0x626912 Gogo::write_globals()
    ../../gcc/go/gofrontend/gogo.cc:1345

gcc version 6.0.0 2015070 (experimental) (GCC)
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dvyukov commented Jul 2, 2015

@paranoiacblack

@ianlancetaylor ianlancetaylor added this to the Gccgo milestone Jul 10, 2015
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CL https://golang.org/cl/13097 mentions this issue.

paranoiacblack pushed a commit to golang/gofrontend that referenced this issue Aug 13, 2015
@ianlancetaylor
compiler: Flatten erroneous subtrees into errors.
fc9da31 
Between the lowering and flattening passes of the compiler, there are
several passes that modify the lowered Go parse tree and as errors are
discovered, several nodes transform into error nodes.  However, for a
higher level node such as a construction expression, the erroneous
nodes in the subtrees might not propagate their error.  The flatten
phase for a node now looks for errors in the subtree and flattens the
node into an error node if any are found.

Fixes golang/go#11559, golang/go#11536, golang/go#11558.

Change-Id: I9a99d5a2f8ab396ca71787c2bd2af3b1f7ef625a
Reviewed-on: https://go-review.googlesource.com/13097
Reviewed-by: Ian Lance Taylor <iant@golang.org>
timshen91 pushed a commit to timshen91/gcc that referenced this issue Aug 13, 2015
compiler: Flatten erroneous subtrees into errors.
5bf8be8 
    
    Between the lowering and flattening passes of the compiler, there are
    several passes that modify the lowered Go parse tree and as errors are
    discovered, several nodes transform into error nodes.  However, for a
    higher level node such as a construction expression, the erroneous
    nodes in the subtrees might not propagate their error.  The flatten
    phase for a node now looks for errors in the subtree and flattens the
    node into an error node if any are found.
    
    Fixes golang/go#11559, golang/go#11536, golang/go#11558.
    
    Reviewed-on: https://go-review.googlesource.com/13097


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@226845 138bc75d-0d04-0410-961f-82ee72b054a4
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