Hi,

when I remove two or more downloaded and stopped torrents, the KTorrent (3.0.1) crashs

Code: Select all

ASSERT failure in QList<T>::operator[]: "index out of range", file /usr/include/QtCore/qlist.h, line 392
zone still contained 2 blocks


Got a backtrace of the crash ?

how can I get that backtrace?

I select all downloaded torrents, push remove button and then it crashes
only info I get is the line above.

with some set of torrents (two at least) it crashes allways, with some set it works

I've tried running it with valgrind, but it shows no useful info

now I'm trying to find out where it crashes by adding debug output to some place in the source.

I've found this:

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connect(core,SIGNAL(torrentAdded(bt::TorrentInterface*)),this,SLOT(torrentAdded(bt::TorrentInterface*)));
connect(core,SIGNAL(torrentRemoved(bt::TorrentInterface*)),this,SLOT(torrentAdded(bt::TorrentInterface*)));


in dbus.cpp : DBus::DBus( )
is it correct? connecting torrentRemoved signal to torrentAdded slot?

Now I know, that when I push the remove button it gets to core::remove(...), it emits signal torrentRemoved and then it crashes

it crashes while its removing first torrent

Finally, I've found this:

ktorrent/viewmodel.cpp

void ViewModel::removeTorrent(bt::TorrentInterface* ti)

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...
if (item.tc == ti)
{
   torrents.erase(i);
   removeRow(idx);
   break;
}
...

calling removeRow(idx) is the last function called before it crashes

still, is there any way how can I get backtrace?

Code: Select all

connect(core,SIGNAL(torrentAdded(bt::TorrentInterface*)),this,SLOT(torrentAdded(bt::TorrentInterface*)));
connect(core,SIGNAL(torrentRemoved(bt::TorrentInterface*)),this,SLOT(torrentAdded(bt::TorrentInterface*)));


That's a stupid copy paste error, luckily the dbus stuff is not much in use at the moment.

BongoMips wrote:Finally, I've found this:

ktorrent/viewmodel.cpp

void ViewModel::removeTorrent(bt::TorrentInterface* ti)

Code: Select all

...
if (item.tc == ti)
{
   torrents.erase(i);
   removeRow(idx);
   break;
}
...

calling removeRow(idx) is the last function called before it crashes

still, is there any way how can I get backtrace?

You can just run in a debugger, trigger the crash, and then type bt to get a backtrace.

Anyway, I will see if I can reproduce this.

OK, I can reproduce it now, you have to remove 2 torrents and make sure that KT doesn't ask any questions for each one of them.

It is fixed