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List: kde-panel-devel
Subject: Re: Review Request: Ensure Plasma Desktop does not crash on exit with
From: "Ben Cooksley" <bcooksley () kde ! org>
Date: 2011-11-22 10:12:31
Message-ID: 20111122101231.11210.31498 () vidsolbach ! de
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> On Nov. 22, 2011, 9:24 a.m., Thomas Lübking wrote:
> > plasma/private/containment_p.h, line 71
> > <http://git.reviewboard.kde.org/r/103202/diff/1/?file=41732#file41732line71>
> >
> > ibeg your pardon?
> > to me this looks like you delete the same entry forever (what *will* crash at a \
> > point) since you don't remove it - should be "takeFirst", yesno?
>
> Ben Cooksley wrote:
> Other code handles this for us - which is why qDeleteAll() crashes.
>
> Thomas Lübking wrote:
> sorry, but the only way i see this could be correct is that qlist (fun with \
> templates) subclasses pointer Types and reimplements delete to automatically remove \
> them from the list, what is, nicely spoken, sick. is there any detailed (official) \
> explanation on this?
> Aaron J. Seigo wrote:
> see ContainmentPrivate::appletDestroyed(Plasma::Applet *applet) in \
> kdelibs/plasma/containment.cpp
Only information I have is https://git.reviewboard.kde.org/r/102981/
I haven't checked the code, but i'm guessing that Plasma::Applet must do something \
similar to what Akregator does. In any case, I tested and Plasma does not infinitely \
loop - it does close properly.
- Ben
-----------------------------------------------------------
This is an automatically generated e-mail. To reply, visit:
http://git.reviewboard.kde.org/r/103202/#review8384
-----------------------------------------------------------
On Nov. 22, 2011, 7:39 a.m., Ben Cooksley wrote:
>
> -----------------------------------------------------------
> This is an automatically generated e-mail. To reply, visit:
> http://git.reviewboard.kde.org/r/103202/
> -----------------------------------------------------------
>
> (Updated Nov. 22, 2011, 7:39 a.m.)
>
>
> Review request for kdelibs and Plasma.
>
>
> Description
> -------
>
> Qt 4.8 contains changes which break qDeleteAll() in certain scenarios. This patch \
> fixes one of those scenarios to ensure that Plasma Desktop does not crash on quit \
> or logout.
>
> Diffs
> -----
>
> plasma/private/containment_p.h 4025bf4
>
> Diff: http://git.reviewboard.kde.org/r/103202/diff/diff
>
>
> Testing
> -------
>
> Compiled, Plasma Desktop no longer crashes on exit.
>
>
> Thanks,
>
> Ben Cooksley
>
>
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This is an automatically generated e-mail. To reply, visit:
<a href="http://git.reviewboard.kde.org/r/103202/">http://git.reviewboard.kde.org/r/103202/</a>
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<blockquote style="margin-left: 1em; border-left: 2px solid #d0d0d0; padding-left: \
10px;"> <p style="margin-top: 0;">On November 22nd, 2011, 9:24 a.m., <b>Thomas \
Lübking</b> wrote:</p> <blockquote style="margin-left: 1em; border-left: 2px solid \
#d0d0d0; padding-left: 10px;">
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<tr>
<th colspan="4" bgcolor="#F0F0F0" style="border-bottom: 1px solid #C0C0C0; \
font-size: 9pt; padding: 4px 8px; text-align: left;"> <a \
href="http://git.reviewboard.kde.org/r/103202/diff/1/?file=41732#file41732line71" \
style="color: black; font-weight: bold; text-decoration: \
underline;">plasma/private/containment_p.h</a> <span style="font-weight: normal;">
(Diff revision 1)
</span>
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<tbody style="background-color: #e4d9cb; padding: 4px 8px; text-align: center;">
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<td colspan="4"><pre style="font-size: 8pt; line-height: 140%; margin: 0; \
">public:</pre></td>
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<tr>
<th bgcolor="#b1ebb0" style="border-right: 1px solid #C0C0C0;" \
align="right"><font size="2"></font></th> <td bgcolor="#c5ffc4" width="50%"><pre \
style="font-size: 8pt; line-height: 140%; margin: 0; "></pre></td> <th \
bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid \
#C0C0C0;" align="right"><font size="2">71</font></th> <td bgcolor="#c5ffc4" \
width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span \
class="k">while</span> <span class="p">(</span><span class="o">!</span><span \
class="n">applets</span><span class="p">.</span><span class="n">isEmpty</span><span \
class="p">())</span> <span class="p">{</span></pre></td> </tr>
</tbody>
</table>
<pre style="white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: \
-pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">ibeg your pardon? to me \
this looks like you delete the same entry forever (what *will* crash at a point) \
since you don't remove it - should be "takeFirst", yesno?</pre> \
</blockquote>
<p>On November 22nd, 2011, 9:27 a.m., <b>Ben Cooksley</b> wrote:</p>
<blockquote style="margin-left: 1em; border-left: 2px solid #d0d0d0; padding-left: \
10px;"> <pre style="white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: \
-pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">Other code handles this \
for us - which is why qDeleteAll() crashes.</pre> </blockquote>
<p>On November 22nd, 2011, 9:57 a.m., <b>Thomas Lübking</b> wrote:</p>
<blockquote style="margin-left: 1em; border-left: 2px solid #d0d0d0; padding-left: \
10px;"> <pre style="white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: \
-pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">sorry, but the only way \
i see this could be correct is that qlist (fun with templates) subclasses pointer \
Types and reimplements delete to automatically remove them from the list, what is, \
nicely spoken, sick. is there any detailed (official) explanation on this?</pre>
</blockquote>
<p>On November 22nd, 2011, 10:11 a.m., <b>Aaron J. Seigo</b> wrote:</p>
<blockquote style="margin-left: 1em; border-left: 2px solid #d0d0d0; padding-left: \
10px;"> <pre style="white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: \
-pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">see \
ContainmentPrivate::appletDestroyed(Plasma::Applet *applet) in \
kdelibs/plasma/containment.cpp</pre> </blockquote>
</blockquote>
<pre style="margin-left: 1em; white-space: pre-wrap; white-space: -moz-pre-wrap; \
white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">Only \
information I have is https://git.reviewboard.kde.org/r/102981/ I haven't checked \
the code, but i'm guessing that Plasma::Applet must do something similar to what \
Akregator does. In any case, I tested and Plasma does not infinitely loop - it does \
close properly.</pre> <br />
<p>- Ben</p>
<br />
<p>On November 22nd, 2011, 7:39 a.m., Ben Cooksley wrote:</p>
<table bgcolor="#fefadf" width="100%" cellspacing="0" cellpadding="8" \
style="background-image: \
url('http://git.reviewboard.kde.org/media/rb/images/review_request_box_top_bg.png'); \
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solid;"> <tr>
<td>
<div>Review request for kdelibs and Plasma.</div>
<div>By Ben Cooksley.</div>
<p style="color: grey;"><i>Updated Nov. 22, 2011, 7:39 a.m.</i></p>
<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Description </h1>
<table width="100%" bgcolor="#ffffff" cellspacing="0" cellpadding="10" \
style="border: 1px solid #b8b5a0"> <tr>
<td>
<pre style="margin: 0; padding: 0; white-space: pre-wrap; white-space: \
-moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: \
break-word;">Qt 4.8 contains changes which break qDeleteAll() in certain scenarios. \
This patch fixes one of those scenarios to ensure that Plasma Desktop does not crash \
on quit or logout.</pre> </td>
</tr>
</table>
<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Testing </h1>
<table width="100%" bgcolor="#ffffff" cellspacing="0" cellpadding="10" style="border: \
1px solid #b8b5a0"> <tr>
<td>
<pre style="margin: 0; padding: 0; white-space: pre-wrap; white-space: \
-moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: \
break-word;">Compiled, Plasma Desktop no longer crashes on exit.</pre> </td>
</tr>
</table>
<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Diffs</b> </h1>
<ul style="margin-left: 3em; padding-left: 0;">
<li>plasma/private/containment_p.h <span style="color: grey">(4025bf4)</span></li>
</ul>
<p><a href="http://git.reviewboard.kde.org/r/103202/diff/" style="margin-left: \
3em;">View Diff</a></p>
</td>
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</div>
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