Codestin Search App

Bug #81046

Literal compaction merges non-equal related literals

Submitted:

2021-05-17 11:39 UTC

Modified:

2021-05-17 13:41 UTC

Votes:	1
Avg. Score:	5.0 ± 0.0
Reproduced:	1 of 1 (100.0%)
Same Version:	1 (100.0%)
Same OS:	1 (100.0%)

From:

felix at felix-kolbe dot de

Assigned:

nikic (profile)

Status:

Closed

Package:

opcache

PHP Version:

8.0.6

OS:

Linux

Private report:

CVE-ID:

None

View Developer Edit

[2021-05-17 11:39 UTC] felix at felix-kolbe dot de

Description:
------------
testet with 8.0.3 and 8.0.5

using a constant with upper-case(sic!) and the same name as a method result in "Call to undefined method" (and vice versa method overwrite constants)

Test script:
---------------
<?php
const fuN = 1;
new test;
class test{
	public function __construct() {
		fuN;
		$this->fun(); // prints	test->fun
		$this->fuN(); //Call to undefined method test::fuN()
		//fuN; coment this out for : Uncaught Error: Undefined constant "fuN"
	}
	function fun(){
		echo "<p>" . __CLASS__ . "->" . __FUNCTION__ .  "</p>";
	}
}

Patches

Pull Requests

History

AllCommentsChangesGit/SVN commitsRelated reports

[2021-05-17 11:56 UTC] [email protected]

-Status: Open +Status: Feedback -Package: Class/Object related +Package: Scripting Engine problem -Assigned To: +Assigned To: cmb

[2021-05-17 11:56 UTC] [email protected]

I cannot reproduce[1].  Is there some "special" extension
involved?

[1] <https://3v4l.org/JuaDl>

[2021-05-17 12:15 UTC] felix at felix-kolbe dot de

OK on bash its work, But not in Apache 

https://www.file-upload.net/download-14586850/PHP8.0.5-phpinfo.pdf.html

php -m
[PHP Modules]
Core
ctype
curl
date
dom
filter
gd
gmp
hash
iconv
json
libxml
mbstring
mysqli
mysqlnd
openssl
pcntl
pcre
PDO
pdo_mysql
pdo_sqlite
Phar
Reflection
session
SimpleXML
sockets
SPL
sqlite3
standard
tokenizer
xml
xmlreader
xmlwriter
Zend OPcache
zip
zlib

[Zend Modules]
Zend OPcache

[2021-05-17 12:23 UTC] felix at felix-kolbe dot de

as eval its work also but as script in Apache Environment(CGI) its produce the error as described above

[2021-05-17 12:25 UTC] [email protected]

-Status: Feedback +Status: Open -Assigned To: cmb +Assigned To:

[2021-05-17 12:25 UTC] [email protected]

Thanks for the further information.  This might be an OPcache
issue.

[2021-05-17 12:34 UTC] felix at felix-kolbe dot de

OK, switching off OPCache prevents the error.

[2021-05-17 12:40 UTC] [email protected]

-Status: Open +Status: Verified -Package: Scripting Engine problem +Package: opcache

[2021-05-17 13:09 UTC] [email protected]

-Status: Verified +Status: Analyzed

[2021-05-17 13:09 UTC] [email protected]

This is a bug in literal compaction. We merge a literal fuN/fuN for the constant with a literal fuN/fun for the method. It looks like the code currently assumes that literals with the same base literal and the same number of related literals must be the same, which is not the case here. I'm surprised this hasn't come up earlier, presumably it does hold for all the other literals.

[2021-05-17 13:41 UTC] [email protected]

-Summary: constant overwrite class method +Summary: Literal compaction merges non-equal related literals -Assigned To: +Assigned To: nikic

[2021-05-17 13:47 UTC] [email protected]

Automatic comment on behalf of nikic
Revision: https://github.com/php/php-src/commit/c446d68f7c9de6da8dc614ca4e065d81130d3956
Log: Fixed bug #81046

[2021-05-17 13:47 UTC] [email protected]

-Status: Analyzed +Status: Closed

	php.net \| support \| documentation \| report a bug \| advanced search \| search howto \| statistics \| random bug \| login
go to bug id or search bugs for


Copyright © 2001-2026 The PHP Group All rights reserved.	Last updated: Wed Jan 28 03:00:01 2026 UTC