Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0xb79b36c0 (LWP 13475)]
0x0847476e in ZEND_ADD_INTERFACE_SPEC_CONST_HANDLER (execute_data=0x9c77348)
    at /home/sjoerd/dev/php/php-src-5.3/Zend/zend_vm_execute.h:892
892		if (!(iface->ce_flags & ZEND_ACC_INTERFACE)) {
(gdb) bt
#0  0x0847476e in ZEND_ADD_INTERFACE_SPEC_CONST_HANDLER (
    execute_data=0x9c77348)
    at /home/sjoerd/dev/php/php-src-5.3/Zend/zend_vm_execute.h:892
#1  0x0847133d in execute (op_array=0x9cb7668)
    at /home/sjoerd/dev/php/php-src-5.3/Zend/zend_vm_execute.h:104
#2  0x08438789 in zend_call_function (fci=0xbfefb644, fci_cache=0xbfefb668)
    at /home/sjoerd/dev/php/php-src-5.3/Zend/zend_execute_API.c:942
#3  0x084390b2 in zend_lookup_class_ex (name=0x9c4bc00 "Foo", name_length=3, 
    use_autoload=1, ce=0xbfefb6f4)
    at /home/sjoerd/dev/php/php-src-5.3/Zend/zend_execute_API.c:1095
#4  0x08439cef in zend_fetch_class (class_name=0x9c4bc00 "Foo", 
    class_name_len=3, fetch_type=4)
    at /home/sjoerd/dev/php/php-src-5.3/Zend/zend_execute_API.c:1537
#5  0x08474002 in ZEND_FETCH_CLASS_SPEC_CONST_HANDLER (execute_data=0x9c772b8)
    at /home/sjoerd/dev/php/php-src-5.3/Zend/zend_vm_execute.h:724
#6  0x0847133d in execute (op_array=0x9c490bc)
    at /home/sjoerd/dev/php/php-src-5.3/Zend/zend_vm_execute.h:104
#7  0x0844689c in zend_execute_scripts (type=8, retval=0x0, file_count=3)
    at /home/sjoerd/dev/php/php-src-5.3/Zend/zend.c:1188
#8  0x083dcdf8 in php_execute_script (primary_file=0xbfefdaf4)
    at /home/sjoerd/dev/php/php-src-5.3/main/main.c:2226
#9  0x08507296 in main (argc=3, argv=0xbfefdc64)
    at /home/sjoerd/dev/php/php-src-5.3/sapi/cli/php_cli.c:1190
(gdb)