Bug #78989 [Opn->Csd]: Delayed variance check involving trait segfaults

From: Date: Tue, 28 Jan 2020 09:45:05 +0000
Subject: Bug #78989 [Opn->Csd]: Delayed variance check involving trait segfaults
References: 1  Groups: php.bugs 
Request: Send a blank email to php-bugs+get-225186@lists.php.net to get a copy of this message 
Edit report at https://bugs.php.net/bug.php?id=78989&edit=1

 ID:                 78989
 Updated by:         nikic@php.net
 Reported by:        nikic@php.net
 Summary:            Delayed variance check involving trait segfaults
-Status:             Open
+Status:             Closed
 Type:               Bug
 Package:            Scripting Engine problem
 PHP Version:        7.4Git-2019-12-18 (Git)
 Block user comment: N
 Private report:     N

 New Comment:

Automatic comment on behalf of nikita.ppv@gmail.com
Revision: http://git.php.net/?p=php-src.git;a=commit;h=1146bdb9b21cdf725dd5ea8882221356779926b6
Log: Fixed bug #78989


Previous Comments:
------------------------------------------------------------------------
[2020-01-27 21:06:55] nikic@php.net

Related To: Bug #79179

------------------------------------------------------------------------
[2019-12-18 09:48:24] nikic@php.net

Description:
------------
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:
---------------
<?php
class X {
    function method($a): T {}
}
trait T {
    function method($r): B {}
}
class U extends X {
    use T;
}




------------------------------------------------------------------------



--
Edit this bug report at https://bugs.php.net/bug.php?id=78989&edit=1

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