(gdb) run test.php
Starting program: /usr/local/bin/php test.php
[Thread debugging using libthread_db enabled]
[New Thread -1218567072 (LWP 28992)]

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread -1218567072 (LWP 28992)]
0x081d2f67 in ZEND_NEW_SPEC_HANDLER (execute_data=0xbfff8a70) at /root/php-5.1.6/Zend/zend_vm_execute.h:409
409             constructor = Z_OBJ_HT_P(object_zval)->get_constructor(object_zval TSRMLS_CC);
(gdb) bt
#0  0x081d2f67 in ZEND_NEW_SPEC_HANDLER (execute_data=0xbfff8a70) at /root/php-5.1.6/Zend/zend_vm_execute.h:409
#1  0x081d2499 in execute (op_array=0xa0a4474) at /root/php-5.1.6/Zend/zend_vm_execute.h:92
#2  0x081bd54e in zend_execute_scripts (type=8, retval=0x0, file_count=3) at /root/php-5.1.6/Zend/zend.c:1109
#3  0x0818d184 in php_execute_script (primary_file=0xbfffae90) at /root/php-5.1.6/main/main.c:1737
#4  0x08216522 in main (argc=2, argv=0xbfffaf64) at /root/php-5.1.6/sapi/cli/php_cli.c:1093