(gdb) bt
#0  0xc0180598 in _sigfillset () from /usr/lib/libc.2
#1  0xc017e048 in _memset () from /usr/lib/libc.2
#2  0xc0183750 in malloc () from /usr/lib/libc.2
#3  0x46f80 in Perl_safesysmalloc ()
   from /usr/perltest/build/perl-5.6.0/./miniperl
#4  0x1ab74 in Perl_newSVOP () from /usr/perltest/build/perl-5.6.0/./miniperl
#5  0x31814 in ?? () from /usr/perltest/build/perl-5.6.0/./miniperl
#6  0x33000 in Perl_yylex () from /usr/perltest/build/perl-5.6.0/./miniperl
#7  0x908d4 in Perl_yyparse () from /usr/perltest/build/perl-5.6.0/./miniperl
#8  0x260dc in ?? () from /usr/perltest/build/perl-5.6.0/./miniperl
#9  0x25544 in perl_parse () from /usr/perltest/build/perl-5.6.0/./miniperl
#10 0x1490c in main () from /usr/perltest/build/perl-5.6.0/./miniperl