Bug 283216

Application: cantor (0.2)
KDE Platform Version: 4.5.5 (KDE 4.5.5)
Qt Version: 4.7.0
Operating System: Linux 2.6.35-30-generic i686
Distribution: Ubuntu 10.10

-- Information about the crash:
- What I was doing when the application crashed:
I was evaluating a sage notebook on Cantor when it crashed. The note book included contour plots of Bessel functions.

The crash can be reproduced some of the time.

-- Backtrace:
Application: Cantor (cantor), signal: Segmentation fault
[Current thread is 1 (Thread 0xb786baa0 (LWP 2962))]

Thread 2 (Thread 0xb74efb70 (LWP 2963)):
#0  0x00e4d416 in __kernel_vsyscall ()
#1  0x00957df6 in poll () from /lib/libc.so.6
#2  0x04294a1b in g_poll () from /lib/libglib-2.0.so.0
#3  0x0428743c in ?? () from /lib/libglib-2.0.so.0
#4  0x04287ba7 in g_main_loop_run () from /lib/libglib-2.0.so.0
#5  0x03a879c4 in ?? () from /usr/lib/libgio-2.0.so.0
#6  0x042ae48f in ?? () from /lib/libglib-2.0.so.0
#7  0x00388cc9 in start_thread () from /lib/libpthread.so.0
#8  0x0096669e in clone () from /lib/libc.so.6

Thread 1 (Thread 0xb786baa0 (LWP 2962)):
[KCrash Handler]
#7  QString::operator= (this=0x40, other=...) at tools/qstring.cpp:1324
#8  0x0830112b in SageExpression::addFileResult (this=0x30, path=...) at ../../../../../cantor/src/backends/sage/sageexpression.cpp:167
#9  0x082fe2bc in SageSession::fileCreated (this=0x92387b0, path=...) at ../../../../../cantor/src/backends/sage/sagesession.cpp:275
#10 0x083005ad in SageSession::qt_metacall (this=0x92387b0, _c=QMetaObject::InvokeMetaMethod, _id=12, _a=0xbfa7c8a8) at ./sagesession.moc:90
#11 0x0216b8ca in QMetaObject::metacall (object=0x92387b0, cl=QMetaObject::ReadProperty, idx=12, argv=0xbfa7c8a8) at kernel/qmetaobject.cpp:237
#12 0x0217e6ad in QMetaObject::activate (sender=0x92387cc, m=0x1b95644, local_signal_index=1, argv=0x9288c00) at kernel/qobject.cpp:3280
#13 0x019f9973 in KDirWatch::created (this=0x92387cc, _t1=...) at ./kdirwatch.moc:106
#14 0x019fa2c4 in KDirWatch::setCreated (this=0x92387cc, _file=...) at ../../kdecore/io/kdirwatch.cpp:1855
#15 0x019fa415 in KDirWatch::qt_metacall (this=0x92387cc, _c=QMetaObject::InvokeMetaMethod, _id=7, _a=0x91e6010) at ./kdirwatch.moc:85
#16 0x0216b8ca in QMetaObject::metacall (object=0x92387cc, cl=QMetaObject::ReadProperty, idx=7, argv=0x91e6010) at kernel/qmetaobject.cpp:237
#17 0x02176df6 in QMetaCallEvent::placeMetaCall (this=0x93277f8, object=0x92387cc) at kernel/qobject.cpp:534
#18 0x021786a2 in QObject::event (this=0x92387cc, e=0x8f14c01) at kernel/qobject.cpp:1219
#19 0x00f79fdc in QApplicationPrivate::notify_helper (this=0x8dce900, receiver=0x92387cc, e=0x93277f8) at kernel/qapplication.cpp:4396
#20 0x00f8004e in QApplication::notify (this=0xbfa7d1e8, receiver=0x92387cc, e=0x93277f8) at kernel/qapplication.cpp:3798
#21 0x005c9d8a in KApplication::notify (this=0xbfa7d1e8, receiver=0x92387cc, event=0x93277f8) at ../../kdeui/kernel/kapplication.cpp:310
#22 0x02165b3b in QCoreApplication::notifyInternal (this=0xbfa7d1e8, receiver=0x92387cc, event=0x93277f8) at kernel/qcoreapplication.cpp:732
#23 0x02168d8b in sendEvent (receiver=0x0, event_type=0, data=0x8db9e98) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#24 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x8db9e98) at kernel/qcoreapplication.cpp:1373
#25 0x02168f4d in QCoreApplication::sendPostedEvents (receiver=0x0, event_type=0) at kernel/qcoreapplication.cpp:1266
#26 0x02194a74 in sendPostedEvents (s=0x8dd0d10) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:220
#27 postEventSourceDispatch (s=0x8dd0d10) at kernel/qeventdispatcher_glib.cpp:277
#28 0x04283855 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#29 0x04287668 in ?? () from /lib/libglib-2.0.so.0
#30 0x04287848 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#31 0x02194565 in QEventDispatcherGlib::processEvents (this=0x8db9b58, flags=...) at kernel/qeventdispatcher_glib.cpp:415
#32 0x0103bbe5 in QGuiEventDispatcherGlib::processEvents (this=0x8db9b58, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#33 0x02164609 in QEventLoop::processEvents (this=0xbfa7d144, flags=) at kernel/qeventloop.cpp:149
#34 0x02164a8a in QEventLoop::exec (this=0xbfa7d144, flags=...) at kernel/qeventloop.cpp:201
#35 0x0216900f in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1009
#36 0x00f78e07 in QApplication::exec () at kernel/qapplication.cpp:3672
#37 0x0804f9e7 in main (argc=5, argv=0xbfa7d354) at ../../../cantor/src/main.cpp:86

Reported using DrKonqi