Description:
------------
I cant provide PHP script, as I'm segfaulting in a Doctrine2 script. I have the function that segfaults and some traces.

Test script:
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(gdb) run -X
Starting program: /usr/local/apache2/bin/httpd -X
[Thread debugging using libthread_db enabled]
Program received signal SIGSEGV, Segmentation fault.
0x00007ffff5e8f672 in execute (op_array=0xb6a990) at /usr/local/src/php-5.4.0RC2/Zend/zend_vm_execute.h:410
410			if ((ret = OPLINE->handler(execute_data TSRMLS_CC)) > 0) {

(gdb) bt
#0  0x00007ffff5e8f672 in execute (op_array=0xb6a990) at /usr/local/src/php-5.4.0RC2/Zend/zend_vm_execute.h:410
#1  0x00007ffff5e3b00e in zend_call_function (fci=0x7fffffffb6d0, fci_cache=0x7fffffffb720) at /usr/local/src/php-5.4.0RC2/Zend/zend_execute_API.c:958
#2  0x00007ffff5c94b12 in zif_array_map (ht=2, return_value=0xbd0358, return_value_ptr=0x0, this_ptr=0x0, return_value_used=1)
    at /usr/local/src/php-5.4.0RC2/ext/standard/array.c:4334
#3  0x00007ffff5e90ef3 in zend_do_fcall_common_helper_SPEC (execute_data=0x7ffff7f953e8) at /usr/local/src/php-5.4.0RC2/Zend/zend_vm_execute.h:642
#4  0x00007ffff5e91efd in ZEND_DO_FCALL_BY_NAME_SPEC_HANDLER (execute_data=0x7ffff7f953e8) at /usr/local/src/php-5.4.0RC2/Zend/zend_vm_execute.h:752
#5  0x00007ffff5e8f67e in execute (op_array=0xbe4600) at /usr/local/src/php-5.4.0RC2/Zend/zend_vm_execute.h:410
#6  0x00007ffff5e4f4a6 in zend_execute_scripts (type=8, retval=0x0, file_count=3) at /usr/local/src/php-5.4.0RC2/Zend/zend.c:1272
#7  0x00007ffff5db8f91 in php_execute_script (primary_file=0x7fffffffe050) at /usr/local/src/php-5.4.0RC2/main/main.c:2414

(gdb) print executor_globals->active_op_array
$3 = (zend_op_array *) 0xb6a990

(gdb) print *(executor_globals->active_op_array)
$4 = {type = 2 '\002', function_name = 0x7fffdeb6e980 "addFieldResult", scope = 0xb6a020, fn_flags = 134283520, prototype = 0x0, num_args = 4, required_num_args = 3, 
  arg_info = 0x7fffdeb6d840, refcount = 0xb6aad8, opcodes = 0x7fffdeb6ec18, last = 28, vars = 0x7fffdeb6f158, last_var = 4, T = 17, brk_cont_array = 0x0, 
  last_brk_cont = 0, try_catch_array = 0x0, last_try_catch = 0, static_variables = 0x0, this_var = 4294967295, 
  filename = 0x7fffdeb6d8c0 "/home/julien/www/Doctrine/lib/Doctrine/ORM/Query/ResultSetMapping.php", line_start = 202, line_end = 213, 
  doc_comment = 0x7fffdeb6f1b8 "/**\n     * Adds a field to the result that belongs to an entity or joined entity.\n     *\n     * @param string $alias The alias of the root entity or joined entity to which the field belongs.\n     * @p"..., doc_comment_len = 843, early_binding = 4294967295, literals = 0x7fffdeb6e9e8, 
  last_literal = 14, run_time_cache = 0xbd0dc8, last_cache_slot = 15, reserved = {0x1, 0x0, 0x0, 0x0}}

(gdb) print executor_globals->opline_ptr
$12 = (zend_op **) 0x7ffff7f99e28

(gdb) print *(executor_globals->opline_ptr)
$13 = (zend_op *) 0x7fffddfe3d78

(gdb) print **(executor_globals->opline_ptr)
Cannot access memory at address 0x7fffddfe3d78

(gdb) print executor_globals->opline_ptr[0]->handler
Cannot access memory at address 0x7fffddfe3d78

(gdb) print executor_globals->opline_ptr[1]->handler
$15 = (opcode_handler_t) 0x2

(gdb) print executor_globals->opline_ptr[1]->opcode 
$20 = 3 '\003'

(gdb) print executor_globals->opline_ptr[1]->result
$21 = {constant = 134283520, var = 134283520, num = 134283520, hash = 134283520, opline_num = 134283520, jmp_addr = 0x8010100, zv = 0x8010100, literal = 0x8010100, 
  ptr = 0x8010100}

(gdb) print executor_globals->opline_ptr[1]->op1
$22 = {constant = 3736529280, var = 3736529280, num = 3736529280, hash = 140736929917312, opline_num = 3736529280, jmp_addr = 0x7fffdeb6e980, zv = 0x7fffdeb6e980, 
  literal = 0x7fffdeb6e980, ptr = 0x7fffdeb6e980}

(gdb) print executor_globals->opline_ptr[1]->op2
$23 = {constant = 11968544, var = 11968544, num = 11968544, hash = 11968544, opline_num = 11968544, jmp_addr = 0xb6a020, zv = 0xb6a020, literal = 0xb6a020, 
  ptr = 0xb6a020}

Here is the function :

 public function addFieldResult($alias, $columnName, $fieldName, $declaringClass = null)
    {
        // column name (in result set) => field name
        $this->fieldMappings[$columnName] = $fieldName;
        // column name => alias of owner
        $this->columnOwnerMap[$columnName] = $alias;
        // field name => class name of declaring class
        $this->declaringClasses[$columnName] = $declaringClass ?: $this->aliasMap[$alias];
        if ( ! $this->isMixed && $this->scalarMappings) {
            $this->isMixed = true;
        }
    }

Expected result:
----------------
The script ends

Actual result:
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The script segfaults