Add failing test for runtime variance fail

Author: nikic

Zend/tests/type_declarations/variance/runtime_fail.phpt

@@ -0,0 +1,20 @@
+--TEST--
+Classes do not exist at compile-time and have incorrect variance at runtime
+--FILE--
+<?php
+
+if (true) {
+    class X {}
+    class Y {}
+}
+
+class A {
+    public function method(): X {}
+}
+class B extends A {
+    public function method(): Y {}
+}
+
+?>
+--EXPECT--
+Should fail.