Bug 354911

Application: ksnapshot (0.8.2)
KDE Platform Version: 4.14.13
Qt Version: 4.8.6
Operating System: Linux 4.2.0-16-generic x86_64
Distribution: Ubuntu 15.10

-- Information about the crash:
- What I was doing when the application crashed:

Trying to send a screenshot to imgur. Everything worked fine until I clicked "Upload", which caused the Kipi plugin *and* KSnapshot to crash.


- Custom settings of the application:

I'm in Kubuntu 15.10 (technically Ubuntu with KDE installed on top), which was upgraded from 15.04 (rather than having a fresh install).

While I have used both 15.04 and 15.10, I've used the Kubuntu Backports PPA to get more up-to-date KDE software.

-- Backtrace:
Application: KSnapshot (ksnapshot), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f16088da840 (LWP 5752))]

Thread 4 (Thread 0x7f15df16f700 (LWP 5754)):
#0  0x00007f160505b8dd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f15e634a12c in  () at /lib/x86_64-linux-gnu/libusb-1.0.so.0
#2  0x00007f16026386aa in start_thread (arg=0x7f15df16f700) at pthread_create.c:333
#3  0x00007f1605066eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7f15dd2d5700 (LWP 5755)):
#0  0x00007f160505749d in read () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f1601d474e0 in g_wakeup_acknowledge (__nbytes=16, __buf=0x7f15dd2d4b30, __fd=<optimized out>) at /usr/include/x86_64-linux-gnu/bits/unistd.h:44
#2  0x00007f1601d474e0 in g_wakeup_acknowledge (wakeup=0x25024c0) at /build/glib2.0-ajuDY6/glib2.0-2.46.1/./glib/gwakeup.c:210
#3  0x00007f1601d03cd4 in g_main_context_check (context=context@entry=0x7f15d80009a0, max_priority=2147483647, fds=fds@entry=0x7f15d8003410, n_fds=n_fds@entry=1) at /build/glib2.0-ajuDY6/glib2.0-2.46.1/./glib/gmain.c:3632
#4  0x00007f1601d04190 in g_main_context_iterate (context=context@entry=0x7f15d80009a0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/glib2.0-ajuDY6/glib2.0-2.46.1/./glib/gmain.c:3837
#5  0x00007f1601d042fc in g_main_context_iteration (context=0x7f15d80009a0, may_block=may_block@entry=1) at /build/glib2.0-ajuDY6/glib2.0-2.46.1/./glib/gmain.c:3901
#6  0x00007f160686020e in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f15d80008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:452
#7  0x00007f160682e0d1 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f15dd2d4d40, flags=...) at kernel/qeventloop.cpp:149
#8  0x00007f160682e445 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f15dd2d4d40, flags=...) at kernel/qeventloop.cpp:204
#9  0x00007f160671d4f9 in QThread::exec() (this=this@entry=0x2a5f7d0) at thread/qthread.cpp:538
#10 0x00007f160680e133 in QInotifyFileSystemWatcherEngine::run() (this=0x2a5f7d0) at io/qfilesystemwatcher_inotify.cpp:265
#11 0x00007f160671fd1c in QThreadPrivate::start(void*) (arg=0x2a5f7d0) at thread/qthread_unix.cpp:349
#12 0x00007f16026386aa in start_thread (arg=0x7f15dd2d5700) at pthread_create.c:333
#13 0x00007f1605066eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7f15cee49700 (LWP 5757)):
#0  0x00007f160263dda0 in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f1606720286 in QWaitCondition::wait(QMutex*, unsigned long) (time=18446744073709551615, this=0x2f50490) at thread/qwaitcondition_unix.cpp:86
#2  0x00007f1606720286 in QWaitCondition::wait(QMutex*, unsigned long) (this=<optimized out>, mutex=0x2f4f8a8, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:158
#3  0x00007f15f3f2d7f8 in KIPIPlugins::KPRawThumbThread::run() () at /usr/lib/digikam/libkipiplugins.so.4.12.0
#4  0x00007f160671fd1c in QThreadPrivate::start(void*) (arg=0x2f4fd30) at thread/qthread_unix.cpp:349
#5  0x00007f16026386aa in start_thread (arg=0x7f15cee49700) at pthread_create.c:333
#6  0x00007f1605066eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7f16088da840 (LWP 5752)):
[KCrash Handler]
#6  0x00007f1605c54b39 in QPixmap::isNull() const (this=<optimized out>) at image/qpixmapdata_p.h:131
#7  0x00007f1605c54b39 in QPixmap::isNull() const (this=this@entry=0x2d5c388) at image/qpixmap.cpp:579
#8  0x00007f1605c5596b in QPixmap::copy(QRect const&) const (this=this@entry=0x2d5c388, rect=...) at image/qpixmap.cpp:382
#9  0x00007f1605c566bf in QPixmap::QPixmap(QPixmap const&) (this=0x7ffd5183d610, pixmap=...) at image/qpixmap.cpp:303
#10 0x00007f16075b3f38 in KPixmapSequence::frameAt(int) const (this=0x2d6ce68, index=1) at ../../kdeui/util/kpixmapsequence.cpp:143
#11 0x00007f15f3f3f261 in KIPIPlugins::KPImagesList::slotProgressTimerDone() () at /usr/lib/digikam/libkipiplugins.so.4.12.0
#12 0x00007f1606843f60 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) (sender=0x2f53400, m=<optimized out>, local_signal_index=<optimized out>, argv=<optimized out>) at kernel/qobject.cpp:3567
#13 0x00007f1606849bd3 in QObject::event(QEvent*) (this=0x2f53400, e=<optimized out>) at kernel/qobject.cpp:1253
#14 0x00007f1605b78cdc in QApplicationPrivate::notify_helper(QObject*, QEvent*) (this=this@entry=0x252d6f0, receiver=receiver@entry=0x2f53400, e=e@entry=0x7ffd5183da80) at kernel/qapplication.cpp:4570
#15 0x00007f1605b7fc16 in QApplication::notify(QObject*, QEvent*) (this=this@entry=0x7ffd5183ddf0, receiver=receiver@entry=0x2f53400, e=e@entry=0x7ffd5183da80) at kernel/qapplication.cpp:4356
#16 0x00007f1607533a2a in KApplication::notify(QObject*, QEvent*) (this=0x7ffd5183ddf0, receiver=0x2f53400, event=0x7ffd5183da80) at ../../kdeui/kernel/kapplication.cpp:311
#17 0x00007f160682f85d in QCoreApplication::notifyInternal(QObject*, QEvent*) (this=0x7ffd5183ddf0, receiver=0x2f53400, event=event@entry=0x7ffd5183da80) at kernel/qcoreapplication.cpp:955
#18 0x00007f16068626c0 in QTimerInfoList::activateTimers() (event=0x7ffd5183da80, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#19 0x00007f16068626c0 in QTimerInfoList::activateTimers() (this=0x253e970) at kernel/qeventdispatcher_unix.cpp:621
#20 0x00007f160685f869 in idleTimerSourceDispatch(GSource*, GSourceFunc, gpointer) (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:193
#21 0x00007f160685f869 in idleTimerSourceDispatch(GSource*, GSourceFunc, gpointer) (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:240
#22 0x00007f1601d03ff7 in g_main_context_dispatch (context=0x25411d0) at /build/glib2.0-ajuDY6/glib2.0-2.46.1/./glib/gmain.c:3154
#23 0x00007f1601d03ff7 in g_main_context_dispatch (context=context@entry=0x25411d0) at /build/glib2.0-ajuDY6/glib2.0-2.46.1/./glib/gmain.c:3769
#24 0x00007f1601d04250 in g_main_context_iterate (context=context@entry=0x25411d0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/glib2.0-ajuDY6/glib2.0-2.46.1/./glib/gmain.c:3840
#25 0x00007f1601d042fc in g_main_context_iteration (context=0x25411d0, may_block=may_block@entry=1) at /build/glib2.0-ajuDY6/glib2.0-2.46.1/./glib/gmain.c:3901
#26 0x00007f16068601ee in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x2508b90, flags=...) at kernel/qeventdispatcher_glib.cpp:450
#27 0x00007f1605c23c26 in QGuiEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#28 0x00007f160682e0d1 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7ffd5183dd00, flags=...) at kernel/qeventloop.cpp:149
#29 0x00007f160682e445 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7ffd5183dd00, flags=...) at kernel/qeventloop.cpp:204
#30 0x00007f1606834429 in QCoreApplication::exec() () at kernel/qcoreapplication.cpp:1227
#31 0x0000000000411441 in  ()
#32 0x00007f1604f80a40 in __libc_start_main (main=0x410a80, argc=3, argv=0x7ffd5183df28, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffd5183df18) at libc-start.c:289
#33 0x0000000000411969 in _start ()

Possible duplicates by query: bug 246632.

Reported using DrKonqi