Remove redundant Exception::__clone() method

Exceptions already prohibit cloning by setting clone_obj to NULL
(which is integrated with reflection). No need to additionally
define a dummy __clone() method.

Author: nikic

Zend/zend_exceptions.c

@@ -251,15 +251,6 @@ static zend_object *zend_error_exception_new(zend_class_entry *class_type) /* {{
 }
 /* }}} */
 
-/* {{{ proto Exception|Error Exception|Error::__clone()
-   Clone the exception object */
-ZEND_COLD ZEND_METHOD(exception, __clone)
-{
-	/* Should never be executable */
-	zend_throw_exception(NULL, "Cannot clone object using __clone()", 0);
-}
-/* }}} */
-
 /* {{{ proto Exception|Error::__construct(string message, int code [, Throwable previous])
    Exception constructor */
 ZEND_METHOD(exception, __construct)
@@ -772,7 +763,6 @@ ZEND_BEGIN_ARG_INFO_EX(arginfo_exception___construct, 0, 0, 0)
 ZEND_END_ARG_INFO()
 
 static const zend_function_entry default_exception_functions[] = {
-	ZEND_ME(exception, __clone, NULL, ZEND_ACC_PRIVATE|ZEND_ACC_FINAL)
 	ZEND_ME(exception, __construct, arginfo_exception___construct, ZEND_ACC_PUBLIC)
 	ZEND_ME(exception, __wakeup, NULL, ZEND_ACC_PUBLIC)
 	ZEND_ME(exception, getMessage, NULL, ZEND_ACC_PUBLIC|ZEND_ACC_FINAL)

sapi/cli/tests/005.phpt

@@ -15,10 +15,10 @@ var_dump(`"$php" -n --rc exception`);
 
 echo "Done\n";
 ?>
---EXPECT--
+--EXPECTF--
 string(40) "Exception: Class unknown does not exist
 "
-string(183) "Class [ <internal:Core> class stdClass ] {
+string(%d) "Class [ <internal:Core> class stdClass ] {
 
   - Constants [0] {
   }
@@ -37,7 +37,7 @@ string(183) "Class [ <internal:Core> class stdClass ] {
 }
 
 "
-string(1607) "Class [ <internal:Core> class Exception implements Throwable ] {
+string(%d) "Class [ <internal:Core> class Exception implements Throwable ] {
 
   - Constants [0] {
   }
@@ -58,10 +58,7 @@ string(1607) "Class [ <internal:Core> class Exception implements Throwable ] {
     Property [ <default> private $previous ]
   }
 
-  - Methods [11] {
-    Method [ <internal:Core> final private method __clone ] {
-    }
-
+  - Methods [10] {
     Method [ <internal:Core, ctor> public method __construct ] {
 
       - Parameters [3] {