[Qt] Backtrace for the crash with QT

[Juha Manninen]

Zeljan,

I finally got a proper backtrace for the SIGSEGV that shows up only in
my AMD 64-bit 3-core "super-computer".
It happens sometimes, maybe once in few hours, and only when moving
mouse on the source editor.

Linux Mint 13 + KDE 4.8.

Regards,
Juha

---------------------------------------

Program received signal SIGSEGV, Segmentation fault.
0x00000000005d623c in fpc_check_object ()
(gdb) bt
#0  0x00000000005d623c in fpc_check_object ()
#1  0x00007fffffffcea0 in ?? ()
#2  0x0000000000962e86 in SLOTMOUSEMOVE (this=0x7fffd2808650,
SENDER=0x28731b0, EVENT=0x7fffffffd690) at qt/qtwidgets.pas:3492
#3  0x000000000095f970 in EVENTFILTER (this=0x7fffd2808650,
SENDER=0x28731b0, EVENT=0x7fffffffd690) at qt/qtwidgets.pas:2384
#4  0x00000000009847d2 in EVENTFILTER (this=0x7fffd2808650,
SENDER=0x28731b0, EVENT=0x7fffffffd690) at qt/qtwidgets.pas:14310
#5  0x0000000000986017 in VIEWPORTEVENTFILTER (this=0x7fffd0613550,
EVENT=0x7fffffffd690, RETVAL=0x7fffffffd0df) at qt/qtwidgets.pas:14782
#6  0x00007ffff7727b7d in
QLCLAbstractScrollArea::viewportEvent(QEvent*) () from
/usr/local/lib/libQt4Pas.so.5
#7  0x00007ffff3d76028 in
QCoreApplicationPrivate::sendThroughObjectEventFilters(QObject*,
QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#8  0x00007ffff45e485f in QApplicationPrivate::notify_helper(QObject*,
QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#9  0x00007ffff45ea0bf in QApplication::notify(QObject*, QEvent*) ()
from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#10 0x00007ffff3d75e9c in QCoreApplication::notifyInternal(QObject*,
QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#11 0x00007ffff45e5862 in
QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*,
QWidget*, QWidget**, QPointer<QWidget>&, bool) () from
/usr/lib/x86_64-linux-gnu/libQtGui.so.4
#12 0x00007ffff4664bf5 in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#13 0x00007ffff4663bae in QApplication::x11ProcessEvent(_XEvent*) ()
from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#14 0x00007ffff468d0d2 in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#15 0x00007ffff1a8cd53 in g_main_context_dispatch () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#16 0x00007ffff1a8d0a0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#17 0x00007ffff1a8d164 in g_main_context_iteration () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#18 0x00007ffff3da53bf in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>)
() from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#19 0x00007ffff468cd5e in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#20 0x00007ffff3d7a10f in
QCoreApplication::processEvents(QFlags<QEventLoop::ProcessEventsFlag>)
() from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#21 0x00007ffff76a629f in QCoreApplication_processEvents () from
/usr/local/lib/libQt4Pas.so.5
#22 0x000000000082f056 in APPPROCESSMESSAGES (this=0x7ffff7f7df50) at
qt/qtobject.inc:281
#23 0x0000000000637fc6 in HANDLEMESSAGE (this=0x7ffff7f7c350) at
include/application.inc:1280
#24 0x000000000063872d in RUNLOOP (this=0x7ffff7f7c350) at
include/application.inc:1413
#25 0x000000000082f026 in APPRUN (this=0x7ffff7f7df50, ALOOP=...) at
qt/qtobject.inc:252
#26 0x00000000006386b1 in RUN (this=0x7ffff7f7c350) at
include/application.inc:1401
#27 0x00000000005d4093 in main () at lazarus.pp:115