Passing an undefined variable or function result to a function expecting said parameter by reference mangles the function parameters.

The following script results in this output:

	SomeFunc(2, 2, 2)  //this is really bad
	SomeFunc(1, 2, 1)  //This is correct
	SomeFunc(1, 2, 2)  //This isn't correct, but it's not good either

This bug is in PHP 4.0.2 and the 4.0.3 CVS. The earliest version I know of with the problem is a 4.0.2 CVS with a build date of Jul 21, so the problem has existed since at least then.

---

function returnUndef() {
	return $foo;
}

function returnDef() {
	return 1;
}

function SomeFunc($a, $b, &$c) {
	echo("SomeFunc($a, $b, $c)\n");
}

SomeFunc(1, 2, returnUndef());
SomeFunc(1, 2, returnDef());
SomeFunc(1, 2, $bar);