Bug #55355 [NEW]: Unexpected fatal error when using abstract functions with traits

From: Date: Wed, 03 Aug 2011 13:47:56 +0000
Subject: Bug #55355 [NEW]: Unexpected fatal error when using abstract functions with traits
Groups: php.bugs 
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From:             
Operating system: Ubuntu 11.04
PHP version:      5.4SVN-2011-08-03 (SVN)
Package:          Class/Object related
Bug Type:         Bug
Bug description:Unexpected fatal error when using abstract functions with traits

Description:
------------
When resolving trait abstract methods, it seems the class hierarchy is not

checked, resulting in a fatal error if an abstract method isn't implemented

directly in the class that is utilising the trait.



Test script:
---------------
<?php

	trait ATrait
	{
		function bar()
		{
			$this->foo();
		}

		abstract function foo(); 
	}

	class Base
	{
		function foo() { }
	}

	class Child extends Base
	{
		use ATrait;	
	}


Actual result:
--------------
PHP Fatal error:  Cannot make non abstract method Base::foo() abstract in
class 
Child in /home/jared/Temp/trait.php on line 21

Fatal error: Cannot make non abstract method Base::foo() abstract in class
Child 
in /home/jared/Temp/trait.php on line 21


-- 
Edit bug report at https://bugs.php.net/bug.php?id=55355&edit=1
-- 
Try a snapshot (PHP 5.4):            https://bugs.php.net/fix.php?id=55355&r=trysnapshot54
Try a snapshot (PHP 5.3):            https://bugs.php.net/fix.php?id=55355&r=trysnapshot53
Try a snapshot (trunk):              https://bugs.php.net/fix.php?id=55355&r=trysnapshottrunk
Fixed in SVN:                        https://bugs.php.net/fix.php?id=55355&r=fixed
Fixed in SVN and need be documented: https://bugs.php.net/fix.php?id=55355&r=needdocs
Fixed in release:                    https://bugs.php.net/fix.php?id=55355&r=alreadyfixed
Need backtrace:                      https://bugs.php.net/fix.php?id=55355&r=needtrace
Need Reproduce Script:               https://bugs.php.net/fix.php?id=55355&r=needscript
Try newer version:                   https://bugs.php.net/fix.php?id=55355&r=oldversion
Not developer issue:                 https://bugs.php.net/fix.php?id=55355&r=support
Expected behavior:                   https://bugs.php.net/fix.php?id=55355&r=notwrong
Not enough info:                     https://bugs.php.net/fix.php?id=55355&r=notenoughinfo
Submitted twice:                     https://bugs.php.net/fix.php?id=55355&r=submittedtwice
register_globals:                    https://bugs.php.net/fix.php?id=55355&r=globals
PHP 4 support discontinued:          https://bugs.php.net/fix.php?id=55355&r=php4
Daylight Savings:                    https://bugs.php.net/fix.php?id=55355&r=dst
IIS Stability:                       https://bugs.php.net/fix.php?id=55355&r=isapi
Install GNU Sed:                     https://bugs.php.net/fix.php?id=55355&r=gnused
Floating point limitations:          https://bugs.php.net/fix.php?id=55355&r=float
No Zend Extensions:                  https://bugs.php.net/fix.php?id=55355&r=nozend
MySQL Configuration Error:           https://bugs.php.net/fix.php?id=55355&r=mysqlcfg

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