Backtrace and coredump

#0  strlen () at ../sysdeps/x86_64/strlen.S:106
#1  0x00007fcf8ea76f90 in _estrdup () from /usr/lib/apache2/modules/libphp5.so
#2  0x00007fcf839ab2e0 in php_ssh2_fopen_wraper_parse_path ()
   from /usr/lib/php5/20121212/ssh2.so
#3  0x00007fcf839af25c in ?? () from /usr/lib/php5/20121212/ssh2.so
#4  0x00007fcf8ea55457 in _php_stream_stat_path ()
   from /usr/lib/apache2/modules/libphp5.so
#5  0x00007fcf8e9d1ed5 in ?? () from /usr/lib/apache2/modules/libphp5.so
#6  0x00007fcf8e9d40db in zif_is_file () from /usr/lib/apache2/modules/libphp5.so
#7  0x00007fcf8e908681 in ?? () from /usr/lib/apache2/modules/libphp5.so
#8  0x00007fcf8ea8bc6b in dtrace_execute_internal ()
   from /usr/lib/apache2/modules/libphp5.so
#9  0x00007fcf8eb4bcc5 in ?? () from /usr/lib/apache2/modules/libphp5.so
#10 0x00007fcf8eac59f8 in execute_ex () from /usr/lib/apache2/modules/libphp5.so
#11 0x00007fcf8ea8bb69 in dtrace_execute_ex () from /usr/lib/apache2/modules/libphp5.so
#12 0x00007fcf8eb4c310 in ?? () from /usr/lib/apache2/modules/libphp5.so
#13 0x00007fcf8eac59f8 in execute_ex () from /usr/lib/apache2/modules/libphp5.so
#14 0x00007fcf8ea8bb69 in dtrace_execute_ex () from /usr/lib/apache2/modules/libphp5.so
#15 0x00007fcf8eb4c310 in ?? () from /usr/lib/apache2/modules/libphp5.so
#16 0x00007fcf8eac59f8 in execute_ex () from /usr/lib/apache2/modules/libphp5.so
#17 0x00007fcf8ea8bb69 in dtrace_execute_ex () from /usr/lib/apache2/modules/libphp5.so
#18 0x00007fcf8eb4c310 in ?? () from /usr/lib/apache2/modules/libphp5.so
#19 0x00007fcf8eac59f8 in execute_ex () from /usr/lib/apache2/modules/libphp5.so
#20 0x00007fcf8ea8bb69 in dtrace_execute_ex () from /usr/lib/apache2/modules/libphp5.so
#21 0x00007fcf8eb4c310 in ?? () from /usr/lib/apache2/modules/libphp5.so
#22 0x00007fcf8eac59f8 in execute_ex () from /usr/lib/apache2/modules/libphp5.so
#23 0x00007fcf8ea8bb69 in dtrace_execute_ex () from /usr/lib/apache2/modules/libphp5.so
#24 0x00007fcf8eb4c310 in ?? () from /usr/lib/apache2/modules/libphp5.so
---Type <return> to continue, or q <return> to quit---
#25 0x00007fcf8eac59f8 in execute_ex () from /usr/lib/apache2/modules/libphp5.so
#26 0x00007fcf8ea8bb69 in dtrace_execute_ex () from /usr/lib/apache2/modules/libphp5.so
#27 0x00007fcf8eb4c310 in ?? () from /usr/lib/apache2/modules/libphp5.so
#28 0x00007fcf8eac59f8 in execute_ex () from /usr/lib/apache2/modules/libphp5.so
#29 0x00007fcf8ea8bb69 in dtrace_execute_ex () from /usr/lib/apache2/modules/libphp5.so
#30 0x00007fcf8ea9d5f0 in zend_execute_scripts ()
   from /usr/lib/apache2/modules/libphp5.so
#31 0x00007fcf8ea3d4d5 in php_execute_script ()
   from /usr/lib/apache2/modules/libphp5.so
#32 0x00007fcf8eb4d94a in ?? () from /usr/lib/apache2/modules/libphp5.so
#33 0x00007fcf92c2c680 in ap_run_handler ()
#34 0x00007fcf92c2cbc9 in ap_invoke_handler ()
#35 0x00007fcf92c4216a in ap_process_async_request ()
#36 0x00007fcf92c42444 in ap_process_request ()
#37 0x00007fcf92c3ef02 in ?? ()
#38 0x00007fcf92c35cc0 in ap_run_process_connection ()
#39 0x00007fcf8f46d767 in ?? () from /usr/lib/apache2/modules/mod_mpm_prefork.so
#40 0x00007fcf8f46d9a6 in ?? () from /usr/lib/apache2/modules/mod_mpm_prefork.so
#41 0x00007fcf8f46e60e in ?? () from /usr/lib/apache2/modules/mod_mpm_prefork.so
#42 0x00007fcf92c1369e in ap_run_mpm ()
#43 0x00007fcf92c0ce36 in main ()