[Bug c++/71628] New: ICE on valid C++11 code (with lambda expression, __typeof operator and variable length array): verify_gimple failed
su at cs dot ucdavis.edu
gcc-bugzilla@gcc.gnu.org
Thu Jun 23 06:03:00 GMT 2016
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71628
Bug ID: 71628
Summary: ICE on valid C++11 code (with lambda expression,
__typeof operator and variable length array):
verify_gimple failed
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: su at cs dot ucdavis.edu
Target Milestone: ---
The following C++11 code causes an ICE when compiled with the current GCC trunk
on x86_64-linux-gnu in both 32-bit and 64-bit modes.
It also affects 4.8.x and later, and is a regression from 4.7.x.
sica [159] % g++-4.7 -c small.cpp -std=c++11
sica [160] % sh
$ g++-trunk -v
Using built-in specs.
COLLECT_GCC=g++-trunk
COLLECT_LTO_WRAPPER=/usr/local/gcc-trunk/libexec/gcc/x86_64-pc-linux-gnu/7.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-source-trunk/configure --enable-languages=c,c++,lto
--prefix=/usr/local/gcc-trunk --disable-bootstrap
Thread model: posix
gcc version 7.0.0 20160622 (experimental) [trunk revision 237715] (GCC)
$
$ g++-4.7 -c -std=c++11 small.cpp
$ clang++ -c -std=c++11 small.cpp
$
$ g++-trunk -c -std=c++11 small.cpp
small.cpp: In lambda function:
small.cpp:6:5: error: Local declaration from a different function
[&] { __typeof (a) x; } ();
^
D.2029
small.cpp:6:22: note: in statement
[&] { __typeof (a) x; } ();
^
_1 = (sizetype) D.2029;
small.cpp:6:5: error: Local declaration from a different function
[&] { __typeof (a) x; } ();
^
D.2029
small.cpp:6:22: note: in statement
[&] { __typeof (a) x; } ();
^
_5 = (sizetype) D.2029;
small.cpp:6:5: internal compiler error: verify_gimple failed
[&] { __typeof (a) x; } ();
^
0xdff39f verify_gimple_in_cfg(function*, bool)
../../gcc-source-trunk/gcc/tree-cfg.c:5212
0xce9212 execute_function_todo
../../gcc-source-trunk/gcc/passes.c:1964
0xce9c0b execute_todo
../../gcc-source-trunk/gcc/passes.c:2016
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
$
----------------------------------
int i;
void foo ()
{
int a[i];
[&] { __typeof (a) x; } ();
}
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