1--TEST-- 2Regression test for incorrect update of pi node users when removing a predecessor block 3--FILE-- 4<?php 5 6function test() { 7 for (; $n--; ) 8 C; 9} 10test(); 11 12?> 13--EXPECTF-- 14Warning: Undefined variable $n in %s on line %d 15 16Warning: Decrement on type null has no effect, this will change in the next major version of PHP in %s on line %d 17