Add test I forgot to commit

Author: ndossche

Zend/tests/pipe_operator/gh18965.phpt

@@ -0,0 +1,12 @@
+--TEST--
+GH-18965: ASSERT_CHECK avoids pipe lhs free
+--INI--
+zend.assertions=0
+--FILE--
+<?php
+namespace Foo;
+range(0, 10) |> assert(...);
+echo "No leak\n";
+?>
+--EXPECT--
+No leak