Adding tests for abstract static methods

tests/classes/abstract_static.phpt

@@ -0,0 +1,26 @@
+--TEST--
+A static abstrcat method may not be called
+--SKIPIF--
+<?php if (version_compare(zend_version(), '2.0.0-dev', '<')) die('skip ZendEngine 2 needed'); ?>
+--FILE--
+<?php
+
+class fail {
+	abstract static function show();
+}
+
+class pass extends fail {
+	static function show() {
+		echo "Call to function show()\n";
+	}
+}
+
+pass::show();
+fail::show();
+
+echo "Done\n"; // shouldn't be displayed
+?>
+--EXPECTF--
+Call to function show()
+
+Fatal error: Cannot call abstract method fail::show() in %s on line %d