(gdb) backtrace
#0  0x00002aaaae17f1f9 in tag_parser (tag=0x2 <Address 0x2 out of bounds>, len=-1216936334,
    back_tag=0x7fffffc91ac7 "") at getandParseWithC_pl_05fd.xs:52
#1  0x00002aaaae17f762 in parser (url=0x4cd9780 "openpolytechnic.ac.nz/ftp/linux/sunsite/docs/faqs/ftp-faq",
    doc=0x2aaab7770010 "HTTP/1.1 200 OK\r\nDate: Wed, 12 Oct 2005 01:16:33 GMT\r\nServer: Apache/2.0.54 (Unix) mod_ssl/2.0.54 OpenSSL/0.9.7g DAV/2\r\nLast-Modified: Sun, 29 May 2005 11:11:07 GMT\r\nETag: \"193b68-1ead-d3e728c0\"\r\nAcce"...,
    buf=0x153efac0 "openpolytechnic U\nac U\nnz U\nftp U\nlinux U\nsunsite U\ndocs U\nfaqs U\nftp U\nfaq U\nftp P\nhowto P\nftp P\nfile P\ntransfer P\nprotocol P\nis P\na P\nclient P\nserver P\ntcp P\nprotocol P\nthat P\nallows P\na P\nuser P\nto"..., blen=16321) at getandParseWithC_pl_05fd.xs:176
#2  0x00002aaaae17fb4a in MyParser (url=0x4cd9780 "openpolytechnic.ac.nz/ftp/linux/sunsite/docs/faqs/ftp-faq",
    page=0x2aaab7770010 "HTTP/1.1 200 OK\r\nDate: Wed, 12 Oct 2005 01:16:33 GMT\r\nServer: Apache/2.0.54 (Unix) mod_ssl/2.0.54 OpenSSL/0.9.7g DAV/2\r\nLast-Modified: Sun, 29 May 2005 11:11:07 GMT\r\nETag: \"193b68-1ead-d3e728c0\"\r\nAcce"..., len=8160) at getandParseWithC_pl_05fd.xs:310
#3  0x00002aaaae180dcb in XS_main_MyParser (my_perl=0x505010, cv=0xb36240) at getandParseWithC_pl_05fd.c:400
#4  0x000000398d69b67e in Perl_pp_entersub ()
   from /usr/lib64/perl5/5.8.6/x86_64-linux-thread-multi/CORE/libperl.so
#5  0x000000398d67f3cd in Perl_runops_debug ()
   from /usr/lib64/perl5/5.8.6/x86_64-linux-thread-multi/CORE/libperl.so
#6  0x000000398d639dbe in perl_run () from /usr/lib64/perl5/5.8.6/x86_64-linux-thread-multi/CORE/libperl.so
#7  0x0000000000401a01 in main ()