(gdb) bt full 
#0 0x00007f43f5131320 in apr_palloc () from
	/usr/lib64/libapr-1.so.0 No symbol table info available. #1
	0x00007f43f5129713 in apr_table_make () from
	/usr/lib64/libapr-1.so.0 No symbol table info available. #2
	0x00007f43f5a173bd in ap_scan_script_header_err_core () No symbol
	table info available. #3 0x00007f43f5a1795e in
	ap_scan_script_header_err_strs () No symbol table info available. #4
	0x00007f43f002479a in modperl_cgi_header_parse () from
	/usr/lib64/apache2/mod_perl.so No symbol table info available. #5
	0x00007f43ee639683 in XS_Apache2__RequestRec_send_cgi_header () from
	/usr/lib/perl5/vendor_perl/5.14.2/x86_64-linux-thread-multi/auto/Apache2/Response/Response.so
	No symbol table info available. #6 0x00007f43efd3bc8f in
	Perl_pp_entersub () from
	/usr/lib/perl5/5.14.2/x86_64-linux-thread-multi/CORE/libperl.so No
	symbol table info available. #7 0x00007f43efd33126 in
	Perl_runops_standard () from
	/usr/lib/perl5/5.14.2/x86_64-linux-thread-multi/CORE/libperl.so No
	symbol table info available. #8 0x00007f43efcceede in Perl_call_sv
	() from
	/usr/lib/perl5/5.14.2/x86_64-linux-thread-multi/CORE/libperl.so No
	symbol table info available. #9 0x00007f43f0019725 in
	modperl_callback () from /usr/lib64/apache2/mod_perl.so No symbol
	table info available. #10 0x00007f43f0019f5c in
	modperl_callback_run_handlers () from /usr/lib64/apache2/mod_perl.so
	No symbol table info available. #11 0x00007f43f001a49f in
	modperl_callback_per_dir () from /usr/lib64/apache2/mod_perl.so No
	symbol table info available. #12 0x00007f43f001490b in ?? () from
	/usr/lib64/apache2/mod_perl.so No symbol table info available. #13
	0x00007f43f0014a82 in modperl_response_handler_cgi () from
	/usr/lib64/apache2/mod_perl.so No symbol table info available. #14
	0x00007f43f5a11a88 in ap_run_handler () No symbol table info
	available. #15 0x00007f43f5a11f0e in ap_invoke_handler () No symbol
	table info available. #16 0x00007f43f5a1f7a0 in ap_process_request
	() No symbol table info available. #17 0x00007f43f5a1c5d8 in ?? ()
	No symbol table info available. #18 0x00007f43f5a18518 in
	ap_run_process_connection () No symbol table info available. #19
	0x00007f43f5a24340 in ?? () No symbol table info available. #20
	0x00007f43f5a24aaa in ?? () No symbol table info available. #21
	0x00007f43f5a24b67 in ?? () No symbol table info available. #22
	0x00007f43f5a254e4 in ap_mpm_run () No symbol table info available.
	#23 0x00007f43f59fc9aa in main () No symbol table info available.
	(gdb)