akregator segfaults when fetching non-well formed rss feed

[Klaus S. Madsen]

Binary package hint: akregator

Today Akregator started crashing when fetching one of my feeds. I'm using Kubuntu Intrepid.

I've identified the feed, and figured out that I can still crash it with the following minimal feed:

<?xml version="1.0" encoding="iso-8859-1" ?>
<rss version="2.0">
<channel>
        <item>
                <guid><http://www.version2.dk/artikel/8938</guid>
        </item>
</channel>
</rss>

Apparently the extra < in the guid causes this crash. I've installed the kdepim-dbg package, but I can't seem to find any dbg-package that will give me the symbols for libQtXml.so.4, so I'm not sure how helpful it is.

[Richard Birnie (rbirnie-deactivatedaccount)]

Thanks for reporting this.

I think the package you need for the missing debugging symbols is libqt4-dbg. Could you give us the url for the original feed that triggers this. If I can reproduce it then we can confirm the bug

[Klaus S. Madsen (ubuntu-hjernemadsen)]

The original feed was fixed the day after I reported the bug here. But the problem still reproduces on my machine, if I take the XML from above and copy it into a file. Then I press "Insert" in akregator and write file:///home/ksm/test.rss as the URL. Selecting OK, will crash akregator.

And I just verified that I had libqt4-dbg installed when I did the attached stacktrace, so it doesn't seem to provide all the symbols, or the stack trace is wrong.

[Richard Birnie (rbirnie-deactivatedaccount)]

OK, I can reproduce this now with the same backtrace. I have exactly the same issue with the debugging symbols. It turns out the package needed for the symbols is libqt4-xmlpatterns-dbg. However, there is currently an issue with our qt debugging packages which is being tracked as bug 261380 so we're a bit stuck for now

[Harald Sitter (apachelogger)]

I suggest one of you forwards the issue to KDE (http://bugs.kde.org) for the time being. I would assume they can try debug it there as well.
That way the issue ought to be resolved faster... waiting for fixed Qt packages could take quite some time :)

[Klaus S. Madsen (ubuntu-hjernemadsen)]

Sorry, I only just saw your comment now. I'll try to raise it as an bug in the KDE bugtracking system.

In the mean time I've reproduced the problem on Jaunty with KDE 4.2.3 from PPA, and that produces a stacktrace from the libQtXml part.

[Klaus S. Madsen (ubuntu-hjernemadsen)]

I have now created the bug in KDE's bugzilla as https://bugs.kde.org/show_bug.cgi?id=192349 .

[Jonathan Thomas (echidnaman)]

This is apparently a Qt bug: http://www.qtsoftware.com/developer/task-tracker/index_html?method=entry&id=254700

[Jonathan Thomas (echidnaman)]

Should be fixed in Qt 4.6.0, according to upstream Qt.