(gdb) run
Starting program: /usr/bin/php
[Thread debugging using libthread_db enabled]
[New Thread 47016849955952 (LWP 14074)]
Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 47016849955952 (LWP 14074)]
0xfffffffff6a40400 in ?? ()
(gdb) bt
#0 0xfffffffff6a40400 in ?? ()
#1 0x00000000005aba08 in php_dl ()
#2 0x000000000061f8f6 in php_load_function_extension_cb ()
#3 0x00000000006538dc in zend_llist_apply ()
#4 0x000000000061f8c8 in php_ini_register_extensions ()
#5 0x000000000061a4dd in php_module_startup ()
#6 0x00000000006e553d in main ()