Description:
------------
Running the test ext/pcre/tests/bug47662.phpt under Apache 2.2 or 2.4 causes the CRT error with the following message:

Unhandled exception at 0x01E3FC19 (php5ts_debug.dll) in httpd.exe: 0xC00000FD: Stack overflow (parameters: 0x00000001, 0x03CE2948).

This error seems to have been existed for a very long time. It happens not only with the pcre ext lately upgraded to 8.31, but also with previous version using PCRE 8.12 . It also happens in both release and debug builds. Here is the backtrace delivered by VS

........................... a lot of match(...) calls .....................
 	php5ts_debug.dll!match(const unsigned char * eptr, const unsigned char * ecode, const unsigned char * mstart, int offset_top, match_data * md, eptrblock * eptrb, unsigned int rdepth) Line 956	C
 	php5ts_debug.dll!match(const unsigned char * eptr, const unsigned char * ecode, const unsigned char * mstart, int offset_top, match_data * md, eptrblock * eptrb, unsigned int rdepth) Line 956	C
 	php5ts_debug.dll!match(const unsigned char * eptr, const unsigned char * ecode, const unsigned char * mstart, int offset_top, match_data * md, eptrblock * eptrb, unsigned int rdepth) Line 956	C
 	php5ts_debug.dll!match(const unsigned char * eptr, const unsigned char * ecode, const unsigned char * mstart, int offset_top, match_data * md, eptrblock * eptrb, unsigned int rdepth) Line 956	C
 	php5ts_debug.dll!match(const unsigned char * eptr, const unsigned char * ecode, const unsigned char * mstart, int offset_top, match_data * md, eptrblock * eptrb, unsigned int rdepth) Line 956	C
 	php5ts_debug.dll!php_pcre_exec(const real_pcre * argument_re, const pcre_extra * extra_data, const char * subject, int length, int start_offset, int options, int * offsets, int offsetcount) Line 6917	C
 	php5ts_debug.dll!php_pcre_match_impl(pcre_cache_entry * pce, char * subject, int subject_len, _zval_struct * return_value, _zval_struct * subpats, int global, int use_flags, long flags, long start_offset, void * * * tsrm_ls) Line 653	C
 	php5ts_debug.dll!php_do_pcre_match(int ht, _zval_struct * return_value, _zval_struct * * return_value_ptr, _zval_struct * this_ptr, int return_value_used, void * * * tsrm_ls, int global) Line 547	C
 	php5ts_debug.dll!zif_preg_match(int ht, _zval_struct * return_value, _zval_struct * * return_value_ptr, _zval_struct * this_ptr, int return_value_used, void * * * tsrm_ls) Line 798	C
 	php5ts_debug.dll!zend_do_fcall_common_helper_SPEC(_zend_execute_data * execute_data, void * * * tsrm_ls) Line 642	C
 	php5ts_debug.dll!ZEND_DO_FCALL_SPEC_CONST_HANDLER(_zend_execute_data * execute_data, void * * * tsrm_ls) Line 2236	C
 	php5ts_debug.dll!execute(_zend_op_array * op_array, void * * * tsrm_ls) Line 410	C
 	php5ts_debug.dll!zend_execute_scripts(int type, void * * * tsrm_ls, _zval_struct * * retval, int file_count, ...) Line 1309	C
 	php5ts_debug.dll!php_execute_script(_zend_file_handle * primary_file, void * * * tsrm_ls) Line 2482	C
 	php5apache2_2.dll!php_handler(request_rec * r) Line 667	C


Test script:
---------------
$regex = '@';
for($bar=0; $bar<4027; $bar++) {
        $regex .= '((?P<x' . $bar . '>))';
}
$regex .= 'fo+bar@';

var_dump(preg_match($regex, 'foobar', $m));

Expected result:
----------------
int(1)

Actual result:
--------------
An exception is thrown.