#0  PerlIO_fast_gets (f=0x817c148) at perlio.c:1721
#1  0x081402e6 in PerlIOBuf_fill (f=0x817ca58) at perlio.c:3576
#2  0x0813da21 in Perl_PerlIO_fill (f=0x817ca58) at perlio.c:1654
#3  0x0813e4ff in PerlIOBase_read (f=0x817ca58, vbuf=0xbfffd657, count=1) at perlio.c:2059
#4  0x08140498 in PerlIOBuf_read (f=0x817ca58, vbuf=0xbfffd657, count=1) at perlio.c:3624
#5  0x0813d670 in Perl_PerlIO_read (f=0x817ca58, vbuf=0xbfffd657, count=1) at perlio.c:1564
#6  0x08141f06 in PerlIO_getc (f=0x817ca58) at perlio.c:4771
#7  0x080deb25 in Perl_sv_gets (sv=0x818513c, fp=0x817ca58, append=0) at sv.c:6341
#8  0x080cd19b in Perl_do_readline () at pp_hot.c:1588
#9  0x080c8cbb in Perl_pp_readline () at pp_hot.c:231
#10 0x080b32da in Perl_runops_debug () at dump.c:1442
#11 0x080624c0 in S_run_body (oldscope=1) at perl.c:1924
#12 0x08062053 in perl_run (my_perl=0x8175e70) at perl.c:1843
#13 0x0805e5f4 in main (argc=2, argv=0xbffffa04, env=0xbffffa10) at perlmain.c:86