Crash in context view

[Leo Franchi]

On 6/26/07, Mark Kretschmann <kretschmann at kde.org> wrote:
>
> Hi,
>
> got this crash with latest trunk, after starting to play a track from
> the playlist. Looks to me like the QGraphicsItem we're dereferencing
> here has already been deleted. This is the line:
>
> yposition = m_contextBoxes.last()->sceneBoundingRect().bottom() +
> BOX_PADDING;


i'm getting it too, but it's not because m_contextBoxes.last() is an
invalid pointer. it seems to be some problem in the
sceneBoundingRect() call
(separating m_contextBoxes.last() in a temporary instantiation is
fine). sebr, any idea?

leo

BT:
>
> #0  0xffffe410 in __kernel_vsyscall ()
> #1  0xb7deb0db in ?? () from /lib/tls/i686/cmov/libpthread.so.0
> #2  0xb77a1211 in Amarok::Crash::crashHandler () at
> /home/kdedev/kde/src/multimedia/amarok/src/amarokcore/crashhandler.cpp:260
> #3  <signal handler called>
> #4  0xb65e2f18 in QGraphicsItem::sceneBoundingRect (this=0x838a438) at
> graphicsview/qgraphicsitem.cpp:2087
> #5  0xb77d5dbe in ContextView::addContextBox (this=0x8383f50,
> newBox=0x88a26e8, index=-1, fadeIn=false, parent=0x0)
>     at
> /home/kdedev/kde/src/multimedia/amarok/src/contextview/contextview.cpp:374
> #6  0xb77d6fb7 in ContextView::showCurrentTrack (this=0x8383f50)
>     at
> /home/kdedev/kde/src/multimedia/amarok/src/contextview/contextview.cpp:459
> #7  0xb77d7bc0 in ContextView::engineStateChanged (this=0x8383f50,
> state=Engine::Playing, oldState=Engine::Empty)
>     at
> /home/kdedev/kde/src/multimedia/amarok/src/contextview/contextview.cpp:86
> #8  0xb7905d4c in EngineSubject::stateChangedNotify (this=0xb7b0dfe8,
> state=Engine::Playing)
>     at /home/kdedev/kde/src/multimedia/amarok/src/engineobserver.cpp:68
> #9  0xb7900b6d in EngineController::slotStateChanged (this=0xb7b0dfe0,
> newState=Engine::Playing)
>     at /home/kdedev/kde/src/multimedia/amarok/src/enginecontroller.cpp:771
> #10 0xb7904055 in EngineController::qt_metacall (this=0xb7b0dfe0,
> _c=QMetaObject::InvokeMetaMethod, _id=34, _a=0xbfcc857c)
>     at
> /home/kdedev/kde/build/multimedia/amarok/src/enginecontroller.moc:161
> #11 0xb7efe8c4 in QMetaObject::activate (sender=0x8977128,
> from_signal_index=8, to_signal_index=8, argv=0xbfcc857c)
>     at kernel/qobject.cpp:3063
> #12 0xb7efed39 in QMetaObject::activate (sender=0x8977128,
> m=0xb7af5434, local_signal_index=4, argv=0xbfcc857c) at
> kernel/qobject.cpp:3125
> #13 0xb78ffa14 in Engine::Base::stateChanged (this=0x8977128,
> _t1=Engine::Playing)
>     at /home/kdedev/kde/build/multimedia/amarok/src/enginebase.moc:118
> #14 0xb321acd7 in XineEngine::play (this=0x8977128, offset=0)
>     at /home/kdedev/kde/src/multimedia/amarok/src/engine/xine/xine-
> engine.cpp:300
>
> --
> Mark
> _______________________________________________
> Amarok-devel mailing list
> Amarok-devel at kde.org
> https://mail.kde.org/mailman/listinfo/amarok-devel
>



-- 
______________________________________________________
Leo Franchi                    angel666 at myrealbox.com
665 Channing Ave         lfranchi at gmail.com
Palo Alto                        cell: (650) 704 3680
CA, USA                        home: (650) 329 0125
Junior,
Palo Alto High School,   http://euthydemus.homelinux.net
65 Embarcadero Road,
Palo Alto,
CA, USA

GPG Key Fingerprint: 713F 1C92 11E3 4696 D067  B681 72D5 EAF0 1499 8B03
Key ID: 14998B03
Public key: http://euthydemus.homelinux.net/pub_key.txt
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://mail.kde.org/pipermail/amarok-devel/attachments/20070627/1fbdd095/attachment.html