Bug #63917 [PATCH]: SplObjectStorage: Iteration of all the objects is not possible after detach()
Edit report at https://bugs.php.net/bug.php?id=63917&edit=1
ID: 63917
Patch added by: ashnazg@php.net
Reported by: LastDragon at yandex dot ru
Summary: SplObjectStorage: Iteration of all the objects is
not possible after detach()
Status: Open
Type: Bug
Package: SPL related
Operating System: all
PHP Version: 5.4.10
Block user comment: N
Private report: N
New Comment:
The following patch has been added/updated:
Patch Name: bug63917.phpt
Revision: 1357744702
URL: https://bugs.php.net/patch-display.php?bug=63917&patch=bug63917.phpt&revision=1357744702
Previous Comments:
------------------------------------------------------------------------
[2013-01-09 06:05:45] LastDragon at yandex dot ru
> Are the "Expected" and "Actual" blocks reversed on this initial report?
Yes. Sorry. Unfortunately I cannot edit this blocks :(
------------------------------------------------------------------------
[2013-01-08 21:05:06] ashnazg@php.net
Are the "Expected" and "Actual" blocks reversed on this initial report? I came
searching for an SplObjectStorage bug where attempting to foreach() it and detach all its members
was failing to detach the final member. This bug report looks like it reports exactly that, if you
switch the Expected and Actual blocks.
In my case, a foreach() around one SplObjectStorage object that performs a detach() per member is
finishing the foreach() loop while leaving one member still attached. I can do a second foreach()
on the SplObjectStorage object, and this time it does see the remaining one member and detaches it
successfully. I suspect, as this bug report seems to specifically say, that the detach() operation
in the foreach() is causing an off-by-one error or is implicitly calling one of the Iterator methods
in a way that throws off the foreach()'s Iterator steps.
------------------------------------------------------------------------
[2013-01-06 11:25:18] LastDragon at yandex dot ru
Description:
------------
Iteration of all the objects is not possible after the detach method was called.
Test script:
---------------
<?php
$s = new SplObjectStorage();
$s->attach(new StdClass);
$s->attach(new StdClass);
$s->attach(new StdClass);
$s->attach(new StdClass);
var_dump($s->count());
foreach ($s as $v) {
var_dump($v);
$s->detach($v);
}
var_dump($s->count());
Expected result:
----------------
int(4)
object(stdClass)#2 (0) {
}
object(stdClass)#4 (0) {
}
object(stdClass)#5 (0) {
}
int(1)
Actual result:
--------------
int(4)
object(stdClass)#2 (0) {
}
object(stdClass)#3 (0) {
}
object(stdClass)#4 (0) {
}
object(stdClass)#5 (0) {
}
int(0)
------------------------------------------------------------------------
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Edit this bug report at https://bugs.php.net/bug.php?id=63917&edit=1
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