Set default_object_handlers when registering internal enum

Author: arnaud-lb

Zend/tests/enum/gh20914-001.phpt

@@ -0,0 +1,16 @@
+--TEST--
+Bug GH-20914: Internal enums can be cloned
+--EXTENSIONS--
+zend_test
+--FILE--
+<?php
+
+try {
+    var_dump(clone ZendTestIntEnum::Foo);
+} catch (Error $e) {
+    echo $e->getMessage() . "\n";
+}
+
+?>
+--EXPECT--
+Trying to clone an uncloneable object of class ZendTestIntEnum

Zend/tests/enum/gh20914-002.phpt

@@ -0,0 +1,54 @@
+--TEST--
+Bug GH-20914: Internal enums can be compared
+--EXTENSIONS--
+zend_test
+--FILE--
+<?php
+
+$foo = ZendTestUnitEnum::Foo;
+$bar = ZendTestUnitEnum::Bar;
+
+var_dump($foo === $foo);
+var_dump($foo == $foo);
+
+var_dump($foo === $bar);
+var_dump($foo == $bar);
+
+var_dump($bar === $foo);
+var_dump($bar == $foo);
+
+var_dump($foo > $foo);
+var_dump($foo < $foo);
+var_dump($foo >= $foo);
+var_dump($foo <= $foo);
+
+var_dump($foo > $bar);
+var_dump($foo < $bar);
+var_dump($foo >= $bar);
+var_dump($foo <= $bar);
+
+var_dump($foo > true);
+var_dump($foo < true);
+var_dump($foo >= true);
+var_dump($foo <= true);
+
+?>
+--EXPECT--
+bool(true)
+bool(true)
+bool(false)
+bool(false)
+bool(false)
+bool(false)
+bool(false)
+bool(false)
+bool(true)
+bool(true)
+bool(false)
+bool(false)
+bool(false)
+bool(false)
+bool(false)
+bool(false)
+bool(false)
+bool(false)

Zend/zend_enum.c

@@ -528,6 +528,8 @@ ZEND_API zend_class_entry *zend_register_internal_enum(
 		zend_class_implements(ce, 1, zend_ce_backed_enum);
 	}
 
+	ce->default_object_handlers = &zend_enum_object_handlers;
+
 	return ce;
 }