--TEST--
Bug #79149 (SEGV in mb_convert_encoding with non-string encodings)
--SKIPIF--
<?php
if (!extension_loaded('mbstring')) die('skip mbstring extension not available');
?>
--FILE--
<?php
var_dump(mb_convert_encoding("", "UTF-8", [0]));
var_dump(mb_convert_encoding('foo', 'UTF-8', array(['bar'], ['baz'])));
var_dump(mb_convert_encoding('foo', 'UTF-8', array("foo\0bar")));
?>
--EXPECTF--
Warning: mb_convert_encoding(): Illegal character encoding specified in %s on line %d
string(0) ""

Notice: Array to string conversion in %s on line %d

Notice: Array to string conversion in %s on line %d

Warning: mb_convert_encoding(): Illegal character encoding specified in %s on line %d
string(3) "foo"

Warning: mb_convert_encoding(): Illegal character encoding specified in %s on line %d
string(3) "foo"