Fix identical comparison of arrays with references

Also commit a test I forgot.

Zend/tests/array_with_refs_identical.phpt

@@ -0,0 +1,13 @@
+--TEST--
+Identical comparison of array with references
+--FILE--
+<?php
+
+$foo = 42;
+$array1 = [&$foo];
+$array2 = [$foo];
+var_dump($array1 === $array2);
+
+?>
+--EXPECT--
+bool(true)

Zend/tests/throw_reference.phpt

@@ -0,0 +1,15 @@
+--TEST--
+Throw reference
+--FILE--
+<?php
+
+$e = new Exception;
+$ref =& $e;
+throw $e;
+
+?>
+--EXPECTF--
+Fatal error: Uncaught exception 'Exception' in %s:%d
+Stack trace:
+#0 {main}
+  thrown in %s on line %d

Zend/zend_operators.c

@@ -1890,6 +1890,8 @@ static int hash_zval_identical_function(zval *z1, zval *z2) /* {{{ */
 	 * whereas this comparison function is expected to return 0 on identity,
 	 * and non zero otherwise.
 	 */
+	ZVAL_DEREF(z1);
+	ZVAL_DEREF(z2);
 	if (is_identical_function(&result, z1, z2 TSRMLS_CC)==FAILURE) {
 		return 1;
 	}