Merge branch 'PHP-7.3'

* PHP-7.3:
  Fixed bug #77494 (Disabling class causes segfault on member access)

Author: dstogov

Zend/tests/bug77494.phpt

@@ -0,0 +1,16 @@
+--TEST--
+Bug #77494 (Disabling class causes segfault on member access)
+--SKIPIF--
+<?php if (!extension_loaded("curl")) exit("skip curl extension not loaded"); ?>
+--INI--
+disable_classes=CURLFile
+--FILE--
+<?php
+$a = new CURLFile();
+var_dump($a->name);
+?>
+--EXPECTF--
+Warning: CURLFile() has been disabled for security reasons in %sbug77494.php on line 2
+
+Notice: Undefined property: CURLFile::$name in %sbug77494.php on line 3
+NULL

Zend/zend_API.c

@@ -2773,6 +2773,17 @@ static zend_object *display_disabled_class(zend_class_entry *class_type) /* {{{
 	zend_object *intern;
 
 	intern = zend_objects_new(class_type);
+
+	/* Initialize default properties */
+	if (EXPECTED(class_type->default_properties_count != 0)) {
+		zval *p = intern->properties_table;
+		zval *end = p + class_type->default_properties_count;
+		do {
+			ZVAL_UNDEF(p);
+			p++;
+		} while (p != end);
+	}
+
 	zend_error(E_WARNING, "%s() has been disabled for security reasons", ZSTR_VAL(class_type->name));
 	return intern;
 }