--TEST--
Ensure an interface may not shadow an inherited constant. 
--FILE--
<?php
interface I1 {
	const FOO = 10;
}

interface I2 extends I1 {
	const FOO = 10;
}

echo "Done\n";
?>
--EXPECTF--

Fatal error: Cannot inherit previously-inherited constant FOO from interface I1 in %s on line 6