Description:
------------
See the example below

Test script:
---------------
<?php
var_dump(preg_match(
    "/a([bc]*|[^bc])*X|A/",
    "abbbbbbcccccccccc...A",
    $m));
var_dump($m);

//this pattern is equal to "/a([bc]|[^bc])*X|A/", which works well

Expected result:
----------------
int(1)
array(1) {
  [0]=>
  string(1) "A"
}


Actual result:
--------------
bool(false)
array(0) {
}