(gdb) bt
#0  0x080e4730 in Perl_re_intuit_start () at eval.c:41
#1  0x080e4433 in Perl_re_intuit_start () at eval.c:41
#2  0x080a38ae in Perl_pp_match () at eval.c:41
#3  0x080a0fba in Perl_runops_standard () at eval.c:41
#4  0x0805dd3c in perl_run () at eval.c:41
#5  0x0805da58 in perl_run () at eval.c:41
#6  0x0805b226 in main () at eval.c:41
#7  0x40090177 in __libc_start_main (main=0x805b1b0 <main>, argc=4, ubp_av=0xbffff9ec, init=0x805a33c <_init>, 
    fini=0x80f4460 <_fini>, rtld_fini=0x4000e184 <_dl_fini>, stack_end=0xbffff9dc)
    at ../sysdeps/generic/libc-start.c:129