https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71581
Bug ID: 71581
Summary: ICE on valid code on x86_64-linux-gnu with
-Wuninitialized (Segmentation fault)
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: chengniansun at gmail dot com
Target Milestone: ---
This is a regression. gcc-4.9 and gcc-4.8 do not ICE.
$: gcc-trunk -v
Using built-in specs.
COLLECT_GCC=gcc-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 20160618 (experimental) [trunk revision 237575] (GCC)
$:
$: gcc-trunk -c small.c -Wuninitialized
small.c: In function ‘fn1’:
small.c:4:1: internal compiler error: Segmentation fault
}
^
0xbbb84f crash_signal
../../gcc-source-trunk/gcc/toplev.c:335
0xdbe07f warn_uninit
../../gcc-source-trunk/gcc/tree-ssa-uninit.c:140
0xdbe3fb warn_uninitialized_vars
../../gcc-source-trunk/gcc/tree-ssa-uninit.c:197
0xdbe730 execute_early_warn_uninitialized
../../gcc-source-trunk/gcc/tree-ssa-uninit.c:2449
0xdbe730 execute
../../gcc-source-trunk/gcc/tree-ssa-uninit.c:2484
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.
$:
$: gcc-trunk -c small.c
$:
$: cat small.c
_Complex long double fn1() {
long double x;
return x;
}
$:
