[mythtv] RE: Segfault in mythfrontend when returning to playlist from watc hing recording...

Fri Apr 4 07:16:04 EST 2003

I see that too. It happens with cvs from round noon yesterday (EST) on a 
standalone frontend.

On Thursday 03 April 2003 21:48, jasonmiller wrote:
>   Well, since the backtrace made no sense to me, I dug in a little more.
> I'm able to prevent the segfault by adding:
>
> diff -r1.104 playbackbox.cpp
> 850c850
> <
> ---
>
> >       if (h < 0) return;
>
> Of course, the screen doesn't update until I hit up or down arrow but it
> beats the heck out of a seg fault!
>
> When it fails, h is negative which is a bad thing as far as I can tell.
> Knowing less than nothing about the code, I have no idea but seems odd
> that I'm the only one seeing it, or at least talking about it :)
>
>
> -----Original Message-----
> From: jasonmiller
> To: 'mythtv-dev at snowman.net'
> Sent: 04/03/2003 2:14 PM
> Subject: Segfault in mythfrontend when returning to playlist from watching
> recording...
>
> With the latest CVS I'm getting a segfault in mythfrontend when I exit
> watching a recording and come back to the playlist.  The playlist
> background shows up (but no playlist) and poof.  I'm running QT v3.1.0.
> Any suggestions?  Backtrace follows...
>
> (gdb) run
> Starting program: /usr/local/bin/mythfrontend
> [New Thread 16384 (LWP 2189)]
> connecting to backend server: 192.168.1.14:6543
> [New Thread 32769 (LWP 2208)]
> [New Thread 16386 (LWP 2209)]
> [New Thread 32771 (LWP 2210)]
> [New Thread 49156 (LWP 2211)]
> [New Thread 65541 (LWP 2212)]
> Changing from None to WatchingPreRecorded
> [New Thread 81926 (LWP 2213)]
> Over/underscanning. V: 0.000000, H: 0.050000, XOff: 0, YOff: 100
> Using XV port 69
> [New Thread 98311 (LWP 2217)]
> [New Thread 114696 (LWP 2218)]
> Delaying to next trigger: 28843974
> Delaying to next trigger: 25624069
> Delaying to next trigger: 26426936
> Delaying to next trigger: 25020302
> Delaying to next trigger: 23133453
> Delaying to next trigger: 19266040
> Delaying to next trigger: 11952297
> Delaying to next trigger: 5268344
> Delaying to next trigger: 1045240
> Changing from WatchingPreRecorded to None
> Changing from None to None
>
> Program received signal SIGSEGV, Segmentation fault.
> [Switching to Thread 16384 (LWP 2189)]
> 0x40665751 in operator==(QString const&, char const*) () from
> /usr/qt/3/lib/libqt-mt.so.3
> (gdb) bt
> #0  0x40665751 in operator==(QString const&, char const*) () from
> /usr/qt/3/lib/libqt-mt.so.3
> #1  0x406657f6 in operator!=(QString const&, char const*) () from
> /usr/qt/3/lib/libqt-mt.so.3
> #2  0x0807fd7c in PlaybackBox::updateShowTitles(QPainter*)
> (this=0xbfffe9c0, p=0xbfffd7a0)
>     at playbackbox.cpp:851
> #3  0x0807cbb8 in PlaybackBox::paintEvent(QPaintEvent*)
> (this=0xbfffe9c0, e=0xbfffdb20)
>     at playbackbox.cpp:496
> #4  0x40417130 in QWidget::event(QEvent*) () from
> /usr/qt/3/lib/libqt-mt.so.3
> #5  0x403853c6 in QApplication::internalNotify(QObject*, QEvent*) ()
> from /usr/qt/3/lib/libqt-mt.so.3
> #6  0x40384986 in QApplication::notify(QObject*, QEvent*) () from
> /usr/qt/3/lib/libqt-mt.so.3
> #7  0x4035b6f2 in QWidget::repaint(QRegion const&, bool) () from
> /usr/qt/3/lib/libqt-mt.so.3
> #8  0x403861ab in QApplication::sendPostedEvents(QObject*, int) () from
> /usr/qt/3/lib/libqt-mt.so.3
> #9  0x40385ff8 in QApplication::sendPostedEvents() () from
> /usr/qt/3/lib/libqt-mt.so.3
> #10 0x4033e835 in QEventLoop::processEvents(unsigned) () from
> /usr/qt/3/lib/libqt-mt.so.3
> #11 0x403990c1 in QEventLoop::processEvents(unsigned, int) () from
> /usr/qt/3/lib/libqt-mt.so.3
> #12 0x40385540 in QApplication::processEvents(int) () from
> /usr/qt/3/lib/libqt-mt.so.3
> #13 0x40385507 in QApplication::processEvents() () from
> /usr/qt/3/lib/libqt-mt.so.3
> #14 0x400afd3f in ReadStringList(QSocket*, QStringList&)
> (socket=0x83908e0, list=@0xbfffdef0)
>     at util.cpp:100
> #15 0x40080ee7 in MythContext::SendReceiveStringList(QStringList&)
> (this=0x8386838, strlist=@0xbfffdef0)
>     at mythcontext.cpp:577
> #16 0x0812332b in RemoteGetRecordedList(bool) (deltype=false) at
> remoteutil.cpp:18
> #17 0x08083440 in PlaybackBox::FillList() (this=0xbfffe9c0) at
> playbackbox.cpp:1381
> #18 0x08084b3c in PlaybackBox::play(ProgramInfo*) (this=0xbfffe9c0,
> rec=0x840ed48) at playbackbox.cpp:1632
> #19 0x08084785 in PlaybackBox::selected() (this=0xbfffe9c0) at
> playbackbox.cpp:1575
> #20 0x080be63a in PlaybackBox::qt_invoke(int, QUObject*)
> (this=0xbfffe9c0, _id=59, _o=0xbfffe170)
>     at moc_playbackbox.cpp:136
> #21 0x403e2f99 in QObject::activate_signal(QConnectionList*, QUObject*)
> () from /usr/qt/3/lib/libqt-mt.so.3
> #22 0x406c2652 in QSignal::signal(QVariant const&) () from
> /usr/qt/3/lib/libqt-mt.so.3
> #23 0x403fd0d8 in QSignal::activate() () from
> /usr/qt/3/lib/libqt-mt.so.3
> #24 0x4038043e in QAccelPrivate::activate(QAccelItem*) () from
> /usr/qt/3/lib/libqt-mt.so.3
> #25 0x4037ee5e in QAccelManager::dispatchAccelEvent(QWidget*,
> QKeyEvent*) ()
>    from /usr/qt/3/lib/libqt-mt.so.3
> #26 0x4037e82e in qt_dispatchAccelEvent(QWidget*, QKeyEvent*) () from
> /usr/qt/3/lib/libqt-mt.so.3
> #27 0x40384907 in QApplication::notify(QObject*, QEvent*) () from
> /usr/qt/3/lib/libqt-mt.so.3
> #28 0x4037ecb6 in QAccelManager::tryAccelEvent(QWidget*, QKeyEvent*) ()
> from /usr/qt/3/lib/libqt-mt.so.3
> #29 0x4037e79e in qt_tryAccelEvent(QWidget*, QKeyEvent*) () from
> /usr/qt/3/lib/libqt-mt.so.3
> #30 0x4032dbab in QETWidget::translateKeyEvent(_XEvent const*, bool) ()
> from /usr/qt/3/lib/libqt-mt.so.3
> #31 0x403294a8 in QApplication::x11ProcessEvent(_XEvent*) () from
> /usr/qt/3/lib/libqt-mt.so.3
> #32 0x4033e8ba in QEventLoop::processEvents(unsigned) () from
> /usr/qt/3/lib/libqt-mt.so.3
> #33 0x40399026 in QEventLoop::enterLoop() () from
> /usr/qt/3/lib/libqt-mt.so.3
> #34 0x40385671 in QApplication::enter_loop() () from
> /usr/qt/3/lib/libqt-mt.so.3
> #35 0x40546bf1 in QDialog::exec() () from /usr/qt/3/lib/libqt-mt.so.3
> #36 0x0806998f in startPlayback() () at main.cpp:60
> #37 0x08069d4c in TVMenuCallback(void*, QString&) (data=0x8386838,
> selection=@0x839b830) at main.cpp:131
> #38 0x400a9533 in ThemedMenu::handleAction(QString&) (this=0x839b6f8,
> action=@0x83b027c)
>     at themedmenu.cpp:1463
> #39 0x400a8cc3 in ThemedMenu::keyPressEvent(QKeyEvent*) (this=0x839b6f8,
> e=0xbffff1a0)
>     at themedmenu.cpp:1387
> #40 0x4041705c in QWidget::event(QEvent*) () from
> /usr/qt/3/lib/libqt-mt.so.3
> #41 0x403853c6 in QApplication::internalNotify(QObject*, QEvent*) ()
> from /usr/qt/3/lib/libqt-mt.so.3
> #42 0x40384d6c in QApplication::notify(QObject*, QEvent*) () from
> /usr/qt/3/lib/libqt-mt.so.3
> #43 0x4032d65e in QETWidget::translateKeyEvent(_XEvent const*, bool) ()
> from /usr/qt/3/lib/libqt-mt.so.3
> #44 0x403294a8 in QApplication::x11ProcessEvent(_XEvent*) () from
> /usr/qt/3/lib/libqt-mt.so.3
> #45 0x4033e8ba in QEventLoop::processEvents(unsigned) () from
> /usr/qt/3/lib/libqt-mt.so.3
> #46 0x40399026 in QEventLoop::enterLoop() () from
> /usr/qt/3/lib/libqt-mt.so.3
> #47 0x40385671 in QApplication::enter_loop() () from
> /usr/qt/3/lib/libqt-mt.so.3
> #48 0x40546bf1 in QDialog::exec() () from /usr/qt/3/lib/libqt-mt.so.3
> #49 0x0806ab1d in RunMenu(QString) (themedir=
>       {static null = {static null = <same as static member of an already
> seen type>, d = 0x835fcc8, static shared_null = 0x835fcc8}, d =
> 0x83aaaa8, static shared_null = 0x835fcc8}) at main.cpp:222
> #50 0x0806bf90 in main (argc=1, argv=0xbffff844) at main.cpp:347
> #51 0x40a3ddb4 in __libc_start_main () from /lib/libc.so.6
>
> _______________________________________________
> mythtv-dev mailing list
> mythtv-dev at snowman.net
> http://lists.snowman.net/cgi-bin/mailman/listinfo/mythtv-dev