------- Comment #3 from danglin at gcc dot gnu dot org 2007-07-24 16:01 -------
The program is segfaulting when compiled at -O2. It doesn't fail at
-O0 or -O1. I added -static to make debugging easier.
Starting program:
/home/dave/gnu/gcc-4.3/objdir/hppa-linux/libstdc++-v3/testsuite/16020.xg
Program received signal SIGSEGV, Segmentation fault.
0x00010450 in __gnu_debug::_Safe_iterator_base::_M_detach_single (
this=0xc016a081) at ../../../../gcc/libstdc++-v3/src/debug.cc:245
245 if (_M_next)
(gdb) bt
#0 0x00010450 in __gnu_debug::_Safe_iterator_base::_M_detach_single (
this=0xc016a081) at ../../../../gcc/libstdc++-v3/src/debug.cc:245
#1 0x00010690 in __gnu_debug::_Safe_sequence_base::_M_detach_all (
this=0xc016ab2c) at ../../../../gcc/libstdc++-v3/src/debug.cc:127
#2 0x0001037c in test01 ()
at
/home/dave/gnu/gcc-4.3/objdir/hppa-linux/libstdc++-v3/include/debug/safe_base.h:185
#3 0x00010408 in main ()
at
/home/dave/gnu/gcc-4.3/gcc/libstdc++-v3/testsuite/23_containers/bitset/cons/16020.cc:40
(gdb) p/x $pc
$1 = 0x10450
(gdb) disass 0x10440 0x10460
Dump of assembler code from 0x10440 to 0x10460:
0x00010440 <_ZN11__gnu_debug19_Safe_iterator_base16_M_detach_singleEv+16>:
ldw c(r26),ret0
0x00010444 <_ZN11__gnu_debug19_Safe_iterator_base16_M_detach_singleEv+20>:
stw ret0,c(r19)
0x00010448 <_ZN11__gnu_debug19_Safe_iterator_base16_M_detach_singleEv+24>:
ldw c(r26),r20
0x0001044c <_ZN11__gnu_debug19_Safe_iterator_base16_M_detach_singleEv+28>:
cmpiclr,= 0,r20,r0
0x00010450 <_ZN11__gnu_debug19_Safe_iterator_base16_M_detach_singleEv+32>:
stw r19,8(r20)
0x00010454 <_ZN11__gnu_debug19_Safe_iterator_base16_M_detach_singleEv+36>:
ldw 4(r21),ret0
0x00010458 <_ZN11__gnu_debug19_Safe_iterator_base16_M_detach_singleEv+40>:
cmpb,=,n r26,ret0,0x10494
<_ZN11__gnu_debug19_Safe_iterator_base16_M_detach_singleEv+100>
0x0001045c <_ZN11__gnu_debug19_Safe_iterator_base16_M_detach_singleEv+44>:
ldw 0(r21),ret0
End of assembler dump.
(gdb) p/x $r20
$3 = 0x61736800
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32878
