Description:
------------
The apache or the CLI reports an segmentation fault while trying to die() or to exit() a script in the write method of a class which extends the SessionHandler class.

Test script:
---------------
<?php
class session_handler extends SessionHandler
{
        function close () {return true;}
        function destroy ($a) {return true;}
        function open ($a,$b) {return true;}
        function gc ($a) {return true;}
        function read ($a) {return "";}
        function write ($a,$b) {die();}
}
session_set_save_handler(new session_handler);
session_start();
session_write_close(); # apache segfaults
print "never appears?";

Actual result:
--------------
Apache/cli segfaults

Backtrace:

#0  0x000000010261de30 in zval_delref_p [inlined] () at /Users/.../php-src-trunk-20120101/Zend/zend.h:82
#1  0x000000010261de30 in i_zval_ptr_dtor [inlined] () at /Users/.../php-src-trunk-20120101/Zend/zend_execute.h:82
#2  0x000000010261de30 in zend_vm_stack_clear_multiple [inlined] () at /Users/.../php-src-trunk-20120101/Zend/zend_execute.h:339
#3  0x000000010261de30 in zend_do_fcall_common_helper_SPEC (execute_data=0x109a170d8) at zend_execute.c:736
#4  0x000000010262720e in ZEND_DO_FCALL_SPEC_CONST_HANDLER (execute_data=0x109a170d8) at zend_vm_execute.h:2215
#5  0x000000010261aec2 in execute (op_array=0x109a51d98) at zend_vm_execute.h:410
#6  0x00000001025c731b in zend_execute_scripts (type=8, retval=0x0, file_count=3) at zend.c:1272
#7  0x0000000102509153 in php_execute_script (primary_file=0x7fff6198ab60) at main.c:2476
#8  0x000000010279d153 in do_cli (argc=2, argv=0x7fff6198ae18) at php_cli.c:983
#9  0x000000010279ee95 in main (argc=2, argv=0x7fff6198ae18) at php_cli.c:1356