Merge branch 'PHP-7.2' into PHP-7.3

* PHP-7.2:
  Follow up #77849 PDOStatement objects in undefined state after clone

Author: krakjoe

ext/pdo/pdo_stmt.c

@@ -2263,22 +2263,6 @@ static int dbstmt_compare(zval *object1, zval *object2)
 	return -1;
 }
 
-static zend_object *dbstmt_clone_obj(zval *zobject)
-{
-	pdo_stmt_t *stmt;
-	pdo_stmt_t *old_stmt;
-
-	stmt = zend_object_alloc(sizeof(pdo_stmt_t), Z_OBJCE_P(zobject));
-	zend_object_std_init(&stmt->std, Z_OBJCE_P(zobject));
-	object_properties_init(&stmt->std, Z_OBJCE_P(zobject));
-
-	old_stmt = Z_PDO_STMT_P(zobject);
-
-	zend_objects_clone_members(&stmt->std, &old_stmt->std);
-
-	return &stmt->std;
-}
-
 zend_object_handlers pdo_dbstmt_object_handlers;
 static int pdo_row_serialize(zval *object, unsigned char **buffer, size_t *buf_len, zend_serialize_data *data);
 
@@ -2301,7 +2285,7 @@ void pdo_stmt_init(void)
 	pdo_dbstmt_object_handlers.unset_property = dbstmt_prop_delete;
 	pdo_dbstmt_object_handlers.get_method = dbstmt_method_get;
 	pdo_dbstmt_object_handlers.compare_objects = dbstmt_compare;
-	pdo_dbstmt_object_handlers.clone_obj = dbstmt_clone_obj;
+	pdo_dbstmt_object_handlers.clone_obj = NULL;
 
 	INIT_CLASS_ENTRY(ce, "PDORow", pdo_row_functions);
 	pdo_row_ce = zend_register_internal_class(&ce);

ext/pdo/tests/bug_77849_2.phpt

@@ -0,0 +1,18 @@
+--TEST--
+PDO Common: Bug #77849 (inconsistent state of cloned statament object)
+--SKIPIF--
+<?php
+if (!extension_loaded('pdo')) die('skip');
+?>
+--FILE--
+<?php
+$stmt = new PDOStatement();
+
+clone $stmt;
+?>
+--EXPECTF--
+Fatal error: Uncaught Error: Trying to clone an uncloneable object of class PDOStatement in %s:4
+Stack trace:
+#0 {main}
+  thrown in %s on line 4
+