1--TEST-- 2Crash on $x['2x']['y'] += 1 when $x is string 3--FILE-- 4<?php 5$x = "a"; 6$x['2x']['y'] += 1; 7 8echo "Done\n"; 9?> 10--EXPECTF-- 11Warning: Illegal string offset "2x" in %s on line %d 12 13Fatal error: Uncaught Error: Cannot use string offset as an array in %soffset_assign.php:%d 14Stack trace: 15#0 {main} 16 thrown in %soffset_assign.php on line %d 17