Description:
------------
Since the latest cvs checkout, php segfaults sometimes on request shutdown within apache.

No code to reproduce right now, it happens approx. every second time. Will try to investigate more later, if it's not obvious anyway to anyone.

Backtrace is below

Actual result:
--------------
#0  0x01a3b768 in shutdown_memory_manager (silent=0, full_shutdown=0) at /opt/cvs/php5/Zend/zend_alloc.c:533
#1  0x019fd9ac in php_request_shutdown (dummy=0x0) at /opt/cvs/php5/main/main.c:1223
#2  0x01aa2a08 in apache_php_module_main (r=0x82ff70, display_source_mode=0) at /opt/cvs/php5/sapi/apache/sapi_apache.c:60
#3  0x01aa3d6c in send_php (r=0x82ff70, display_source_mode=0, filename=0x8304e0 "/Users/chregu/clients/berghilfe/index.php") at /opt/cvs/php5/sapi/apache/mod_php5.c:621
#4  0x01aa3df4 in send_parsed_php (r=0x82ff70) at /opt/cvs/php5/sapi/apache/mod_php5.c:636
#5  0x000529f8 in ap_invoke_handler ()
#6  0x00040c0c in process_request_internal ()
#7  0x00041134 in ap_internal_redirect ()
#8  0x0000cf30 in handle_dir ()
#9  0x000529f8 in ap_invoke_handler ()
#10 0x00040c0c in process_request_internal ()
#11 0x00040c9c in ap_process_request ()
#12 0x0002fed4 in child_main ()
#13 0x000300f0 in make_child ()
#14 0x000302d4 in startup_children ()
#15 0x00030c2c in standalone_main ()
#16 0x0003177c in main ()
#17 0x00001c10 in _start ()
#18 0x00001a90 in start ()