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gccgo: segmentation fault (4) #11559

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dvyukov opened this issue Jul 3, 2015 · 3 comments
Closed

gccgo: segmentation fault (4) #11559

dvyukov opened this issue Jul 3, 2015 · 3 comments
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Gccgo

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@dvyukov
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dvyukov commented Jul 3, 2015

gccgo crashes on the following input:

package a
var a = func({-chan<-a<-})
go1: internal compiler error: Segmentation fault
0xb4170f crash_signal
    ../../gcc/toplev.c:360
0x64f48a Send_statement::do_flatten(Gogo*, Named_object*, Block*, Statement_inserter*)
    ../../gcc/go/gofrontend/statements.cc:4391
0x610f8c Statement::flatten(Gogo*, Named_object*, Block*, Statement_inserter*)
    ../../gcc/go/gofrontend/statements.h:320
0x610f8c Flatten::statement(Block*, unsigned long*, Statement*)
    ../../gcc/go/gofrontend/gogo.cc:3834
0x64edb4 Statement::traverse(Block*, unsigned long*, Traverse*)
    ../../gcc/go/gofrontend/statements.cc:44
0x613e5d Block::traverse(Traverse*)
    ../../gcc/go/gofrontend/gogo.cc:5741
0x61409e Function::traverse(Traverse*)
    ../../gcc/go/gofrontend/gogo.cc:4863
0x6140f0 Flatten::function(Named_object*)
    ../../gcc/go/gofrontend/gogo.cc:3799
0x616a41 Bindings::traverse(Traverse*, bool)
    ../../gcc/go/gofrontend/gogo.cc:7516
0x616b71 Gogo::traverse(Traverse*)
    ../../gcc/go/gofrontend/gogo.cc:2491
0x616dcf Gogo::flatten()
    ../../gcc/go/gofrontend/gogo.cc:3900
0x6105db go_parse_input_files(char const**, unsigned int, bool, bool)
    ../../gcc/go/gofrontend/go.cc:139
0x60c32f go_langhook_parse_file
    ../../gcc/go/go-lang.c:304

gcc version 6.0.0 2015070 (experimental) (GCC)
@dvyukov
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dvyukov commented Jul 3, 2015

@paranoiacblack

@ianlancetaylor ianlancetaylor added this to the Gccgo milestone Jul 10, 2015
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CL https://golang.org/cl/12795 mentions this issue.

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CL https://golang.org/cl/13097 mentions this issue.

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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