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Bug #69172 array_slice behaviour BC in PHP7
Submitted: 2015-03-03 16:22 UTC Modified: 2015-03-04 01:35 UTC
Votes:1
Avg. Score:4.0 ± 0.0
Reproduced:1 of 1 (100.0%)
Same Version:1 (100.0%)
Same OS:0 (0.0%)
From: hdtfonseca at gmail dot com Assigned: reeze (profile)
Status: Closed Package: Arrays related
PHP Version: master-Git-2015-03-03 (Git) OS:
Private report: No CVE-ID: None
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 [2015-03-03 16:22 UTC] hdtfonseca at gmail dot com 
Description:
------------
The array_slice functions seems to being behaving differently in master (PHP7).
 
The attached test script will output differently in PHP < 7

Test script:
---------------
$stack[] = 'wew';
$stack[] = 'wew';
$stack[] = 'wew';
$stack[] = 'wew';
$stack = array_slice($stack, 0, - 2);
$stack[] = 'wew';

print_r($stack);


Expected result:
----------------
Array
(
    [0] => wew
    [1] => wew
    [2] => wew
)

Actual result:
--------------
Array
(
    [0] => wew
    [1] => wew
    [3] => wew
)

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 [2015-03-03 18:01 UTC] reeze@php.net
-Status: Open +Status: Closed -Assigned To: +Assigned To: reeze
 [2015-03-03 18:01 UTC] reeze@php.net 
The fix for this bug has been committed.

Snapshots of the sources are packaged every three hours; this change
will be in the next snapshot. You can grab the snapshot at
http://snaps.php.net/.

 For Windows:

http://windows.php.net/snapshots/
 
Thank you for the report, and for helping us make PHP better.

This has been fixed, please try lastest master.
 [2015-03-04 00:24 UTC] hdtfonseca at gmail dot com 
Hi, I'm sorry, I couldn't find the commit in master, can you give me a hint?
 [2015-03-04 00:58 UTC] reeze@php.net 
See bug #69166
 [2015-03-04 00:58 UTC] yohgaki@php.net 
It seems it's fixed. I don't know which commit does, though.

[yohgaki@dev php-src]$ ./php-bin
<?php

$stack[] = 'wew';
$stack[] = 'wew';
$stack[] = 'wew';
$stack[] = 'wew';
$stack = array_slice($stack, 0, - 2);
$stack[] = 'wew';

print_r($stack);

Array
(
    [0] => wew
    [1] => wew
    [2] => wew
)
 [2015-03-04 01:12 UTC] hdtfonseca at gmail dot com 
Thanks, I didn't notice that those were related. Shouldn't we add tests for those?
Are the actual/expected results of this both issues enough for a PR to be accepted?
 [2015-03-04 01:35 UTC] reeze@php.net 
Yes, I think that fix's test is enough, they are the same root cause. we can't enumerate all of the usage of that case ;-)
 
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