- Add test case for bug 20120, bison bug.

tests/classes/bug20120.phpt

@@ -0,0 +1,26 @@
+--TEST--
+Methods via variable name, bug #20120
+--SKIP--
+--FILE--
+<?php
+class bugtest {
+        function bug() {
+                echo "test\n";
+        }
+	function refbug() {
+		echo "test2\n";
+	}
+}
+$method='bug';
+bugtest::$method();
+$foo=&$method;
+$method='refbug';
+bugtest::$foo();
+
+$t = new bugtest;
+$t->$method();
+?>
+--EXPECT--
+test
+test2
+test2