Fix foreach/get_object_vars for shadowed properties

If we are in a scope where the shadowed private property is
visible, the shadowing public property should not be visible.

Author: nikic

Zend/tests/foreach_shadowed_property.phpt

@@ -0,0 +1,28 @@
+--TEST--
+Foreach over object with shadowed private property
+--FILE--
+<?php
+  
+class Test {
+    private $prop = "Test";
+
+    function run() {
+        foreach ($this as $k => $v) {
+            echo "$k => $v\n";
+        }
+        var_dump(get_object_vars($this));
+    }
+}
+class Test2 extends Test {
+    public $prop = "Test2";
+}
+
+(new Test2)->run();
+
+?>
+--EXPECT--
+prop => Test
+array(1) {
+  ["prop"]=>
+  string(4) "Test"
+}

Zend/zend_object_handlers.c

@@ -558,16 +558,16 @@ ZEND_API int zend_check_property_access(zend_object *zobj, zend_string *prop_inf
 		} else {
 			ZEND_ASSERT(property_info->flags & ZEND_ACC_PROTECTED);
 		}
+		return SUCCESS;
 	} else {
 		property_info = zend_get_property_info(zobj->ce, prop_info_name, 1);
 		if (property_info == NULL) {
 			return SUCCESS;
 		} else if (property_info == ZEND_WRONG_PROPERTY_INFO) {
 			return FAILURE;
 		}
-		ZEND_ASSERT(property_info->flags & ZEND_ACC_PUBLIC);
+		return (property_info->flags & ZEND_ACC_PUBLIC) ? SUCCESS : FAILURE;
 	}
-	return SUCCESS;
 }
 /* }}} */