http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59436
--- Comment #10 from H.J. Lu <hjl.tools at gmail dot com> ---
On Linux/x86-64, I got
[hjl@gnu-34 ~]$ cat /tmp/x.cc
#include <bits/stdc++.h>
[hjl@gnu-34 ~]$
...
Starting program: /export/gnu/import/git/gcc-test-intel64corei7/bld/gcc/cc1plus
-quiet -nostdinc++ -nostdinc++ -v -I
/export/gnu/import/git/gcc-test-intel64corei7/bld/x86_64-unknown-linux-gnu/libstdc++-v3/include/x86_64-unknown-linux-gnu
-I
/export/gnu/import/git/gcc-test-intel64corei7/bld/x86_64-unknown-linux-gnu/libstdc++-v3/include
-I
/export/gnu/import/git/gcc-test-intel64corei7/src-trunk/libstdc++-v3/libsupc++
-I
/export/gnu/import/git/gcc-test-intel64corei7/src-trunk/libstdc++-v3/include/backward
-I
/export/gnu/import/git/gcc-test-intel64corei7/src-trunk/libstdc++-v3/testsuite/util
-iprefix
/export/gnu/import/git/gcc-test-intel64corei7/bld/gcc/../lib/gcc/x86_64-unknown-linux-gnu/4.9.0/
-isystem /export/gnu/import/git/gcc-test-intel64corei7/bld/./gcc/include
-isystem /export/gnu/import/git/gcc-test-intel64corei7/bld/./gcc/include-fixed
-D_GNU_SOURCE -D _GLIBCXX_ASSERT -D _GNU_SOURCE -D _GNU_SOURCE -D LOCALEDIR=.
-isystem /usr/4.9.0/x86_64-unknown-linux-gnu/include -isystem
/usr/4.9.0/x86_64-unknown-linux-gnu/sys-include /tmp/x.cc -quiet -dumpbase x.cc
-mtune=corei7 -march=corei7 -auxbase-strip /tmp/x.s -g -g -O2 -O2 -std=gnu++11
-version -fdiagnostics-color=never -fmessage-length=0 -ffunction-sections
-fdata-sections -o /tmp/x.s
GNU C++ (GCC) version 4.9.0 20131216 (experimental) [trunk revision 206016]
(x86_64-unknown-linux-gnu)
compiled by GNU C version 4.9.0 20131216 (experimental) [trunk revision
206016], GMP version 5.1.1, MPFR version 3.1.1, MPC version 1.0.1
..
program received signal SIGSEGV, Segmentation fault.
unlink_from_assembler_name_hash (node=0x100472aca0,
with_clones=with_clones@entry=false) at ../../src-trunk/gcc/symtab.c:251
251 gcc_assert (*slot == node);
Missing separate debuginfos, use: debuginfo-install glibc-2.17-20.0.fc19.x86_64
gmp-5.1.1-2.0.fc19.x86_64 libmpc-1.0.1-1.fc19.x86_64 mpfr-3.1.1-2.fc19.x86_64
zlib-1.2.7-10.fc19.x86_64
(gdb) p slot
$1 = (void **) 0x0
