|  support |  documentation |  report a bug |  advanced search |  search howto |  statistics |  random bug |  login
Bug #78989 Delayed variance check involving trait segfaults
Submitted: 2019-12-18 09:48 UTC Modified: -
From: Assigned:
Status: Closed Package: Scripting Engine problem
PHP Version: 7.4Git-2019-12-18 (Git) OS:
Private report: No CVE-ID: None
View Add Comment Developer Edit
Welcome! If you don't have a Git account, you can't do anything here.
You can add a comment by following this link or if you reported this bug, you can edit this bug over here.
Block user comment
Status: Assign to:
Bug Type:
New email:
PHP Version: OS:


 [2019-12-18 09:48 UTC]
Delayed variance checks may crash when traits are involved. I believe this is because we keep around a zend_function pointer to a zend_function that only exists temporarily.

Test script:
class X {
    function method($a): T {}
trait T {
    function method($r): B {}
class U extends X {
    use T;


Add a Patch

Pull Requests

Add a Pull Request


AllCommentsChangesGit/SVN commitsRelated reports
 [2020-01-28 09:45 UTC]
Automatic comment on behalf of
Log: Fixed bug #78989
 [2020-01-28 09:45 UTC]
-Status: Open +Status: Closed
PHP Copyright © 2001-2021 The PHP Group
All rights reserved.
Last updated: Thu Jan 21 21:01:24 2021 UTC