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Bug #77966 Cannot alias a method named "namespace"
Submitted: 2019-05-04 01:42 UTC Modified: 2019-05-07 15:23 UTC
From: mattacosta at gmail dot com Assigned:
Status: Closed Package: Scripting Engine problem
PHP Version: 7.3.5 OS:
Private report: No CVE-ID: None
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 [2019-05-04 01:42 UTC] mattacosta at gmail dot com 
Description:
------------
Methods may use semi-reserved keywords, however it is not possible to alias a method named "namespace". According to the error, the alias statement somehow becomes equivalent to 'as as bar'.

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

trait A {
    function namespace() {}
}

class C {
    use A {
        namespace as bar;
    }
}

Expected result:
----------------
No error. This should be no different than if the method were named 'foo' and then using 'foo as bar'.

Actual result:
--------------
Fatal error: An alias (bar) was defined for method as(), but this method does not exist in /in/DmNne on line 7

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 [2019-05-07 15:23 UTC] nikic@php.net
-Status: Open +Status: Verified
 [2019-05-07 15:23 UTC] nikic@php.net 
I think the problem here is that we'll only reduce T_NAMESPACE as a semi-reserved identifier after already fetching T_AS as the next lookahead token, at which point zend_lex_tstring() will use the contents of "as" rather than "namespace".
 [2020-06-05 17:11 UTC] nikic@php.net 
The following pull request has been associated:

Patch Name: Fix bug #77966: Cannot alias a method named "namespace"
On GitHub:  https://github.com/php/php-src/pull/5668
Patch:      https://github.com/php/php-src/pull/5668.patch
 [2020-06-08 10:59 UTC] nikic@php.net 
Automatic comment on behalf of nikita.ppv@gmail.com
Revision: http://git.php.net/?p=php-src.git;a=commit;h=b03cafd19c01db57b89727ce77cc89a7d816077c
Log: Fix bug #77966: Cannot alias a method named &quot;namespace&quot;
 [2020-06-08 10:59 UTC] nikic@php.net
-Status: Verified +Status: Closed
 
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