https://bugs.kde.org/show_bug.cgi?id=361495

            Bug ID: 361495
           Summary: [Crash]Krita complains "Unknown file type" when
                    opening a back kra file, when we press ok it crashes
           Product: krita
           Version: unspecified
          Platform: Compiled Sources
                OS: Linux
            Status: UNCONFIRMED
          Keywords: drkonqi
          Severity: crash
          Priority: NOR
         Component: general
          Assignee: krita-bugs-n...@kde.org
          Reporter: raghavendr.ra...@gmail.com

Application: krita ()
 (Compiled from sources)
Qt Version: 5.6.0
Frameworks Version: 5.20.0
Operating System: Linux 4.4.5-1-ARCH x86_64
Distribution (Platform): Archlinux Packages

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

There are actually two things in this bug 
1) backup kra file is not recognised in krita
2) pressing ok in unknown file type dialog box crashes krita

I tired to open a backup file in krita ( the one with .kra~ extension) Krita
complained about it being unknown file type, so then i pressed the "OK" button
in warning dialog , immediately krita crashed I tried it two or three more
times it happened everytime.

I tired with some random files which are unknown or not supposed to open in
krita, each time I press ok it crashes krita

The crash can be reproduced every time.

-- Backtrace:
Application: krita (krita), signal: Segmentation fault
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f377dcf9840 (LWP 26337))]

Thread 5 (Thread 0x7f375c5f2700 (LWP 26339)):
#0  0x00007f3775788c3d in poll () from /usr/lib/libc.so.6
#1  0x00007f3770bb6f7c in ?? () from /usr/lib/libglib-2.0.so.0
#2  0x00007f3770bb708c in g_main_context_iteration () from
/usr/lib/libglib-2.0.so.0
#3  0x00007f37765bbcab in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
from /usr/lib/libQt5Core.so.5
#4  0x00007f37765646fa in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from
/usr/lib/libQt5Core.so.5
#5  0x00007f377638dfe4 in QThread::exec() () from /usr/lib/libQt5Core.so.5
#6  0x00007f37719d1a55 in ?? () from /usr/lib/libQt5DBus.so.5
#7  0x00007f3776392de8 in ?? () from /usr/lib/libQt5Core.so.5
#8  0x00007f3772082424 in start_thread () from /usr/lib/libpthread.so.0
#9  0x00007f3775791cbd in clone () from /usr/lib/libc.so.6

Thread 4 (Thread 0x7f37475b0700 (LWP 26340)):
#0  0x00007f377208803f in pthread_cond_wait@@GLIBC_2.3.2 () from
/usr/lib/libpthread.so.0
#1  0x00007f3776393c8b in QWaitCondition::wait(QMutex*, unsigned long) () from
/usr/lib/libQt5Core.so.5
#2  0x00007f377638cc3b in QSemaphore::acquire(int) () from
/usr/lib/libQt5Core.so.5
#3  0x00007f377c91b6ee in KisTileDataPooler::waitForWork (this=0x7f377cd9b980
<(anonymous namespace)::Q_QGS_s_instance::innerFunction()::holder>) at
/home/raghu/kf5/src/krita/libs/image/tiles3/kis_tile_data_pooler.cc:165
#4  0x00007f377c91bdea in KisTileDataPooler::run (this=0x7f377cd9b980
<(anonymous namespace)::Q_QGS_s_instance::innerFunction()::holder>) at
/home/raghu/kf5/src/krita/libs/image/tiles3/kis_tile_data_pooler.cc:187
#5  0x00007f3776392de8 in ?? () from /usr/lib/libQt5Core.so.5
#6  0x00007f3772082424 in start_thread () from /usr/lib/libpthread.so.0
#7  0x00007f3775791cbd in clone () from /usr/lib/libc.so.6

Thread 3 (Thread 0x7f3746daf700 (LWP 26341)):
#0  0x00007f377208803f in pthread_cond_wait@@GLIBC_2.3.2 () from
/usr/lib/libpthread.so.0
#1  0x00007f3776393c8b in QWaitCondition::wait(QMutex*, unsigned long) () from
/usr/lib/libQt5Core.so.5
#2  0x00007f377638cef6 in QSemaphore::tryAcquire(int, int) () from
/usr/lib/libQt5Core.so.5
#3  0x00007f377c934793 in KisTileDataSwapper::waitForWork (this=<optimized
out>) at
/home/raghu/kf5/src/krita/libs/image/tiles3/swap/kis_tile_data_swapper.cpp:86
#4  0x00007f377c93495a in KisTileDataSwapper::run (this=0x7f377cd9b9c0
<(anonymous namespace)::Q_QGS_s_instance::innerFunction()::holder+64>) at
/home/raghu/kf5/src/krita/libs/image/tiles3/swap/kis_tile_data_swapper.cpp:92
#5  0x00007f3776392de8 in ?? () from /usr/lib/libQt5Core.so.5
#6  0x00007f3772082424 in start_thread () from /usr/lib/libpthread.so.0
#7  0x00007f3775791cbd in clone () from /usr/lib/libc.so.6

Thread 2 (Thread 0x7f37465ae700 (LWP 26342)):
#0  0x00007f377208803f in pthread_cond_wait@@GLIBC_2.3.2 () from
/usr/lib/libpthread.so.0
#1  0x00007f3776393c8b in QWaitCondition::wait(QMutex*, unsigned long) () from
/usr/lib/libQt5Core.so.5
#2  0x00007f37774ba3a2 in ?? () from /usr/lib/libQt5Widgets.so.5
#3  0x00007f3776392de8 in ?? () from /usr/lib/libQt5Core.so.5
#4  0x00007f3772082424 in start_thread () from /usr/lib/libpthread.so.0
#5  0x00007f3775791cbd in clone () from /usr/lib/libc.so.6

Thread 1 (Thread 0x7f377dcf9840 (LWP 26337)):
[KCrash Handler]
#5  KisImage::requestStrokeCancellation (this=0x0) at
/home/raghu/kf5/src/krita/libs/image/kis_image.cc:1277
#6  0x00007f377d6de2a4 in KisDocument::~KisDocument (this=0x9e0a2f0,
__in_chrg=<optimized out>) at
/home/raghu/kf5/src/krita/libs/ui/KisDocument.cpp:499
#7  0x00007f377d6de5c9 in KisDocument::~KisDocument (this=0x9e0a2f0,
__in_chrg=<optimized out>) at
/home/raghu/kf5/src/krita/libs/ui/KisDocument.cpp:514
#8  0x00007f377d6fbe40 in KisMainWindow::openDocumentInternal
(this=this@entry=0x8f515b0, url=..., newdoc=0x9e0a2f0, newdoc@entry=0x0) at
/home/raghu/kf5/src/krita/libs/ui/KisMainWindow.cpp:767
#9  0x00007f377d700a25 in KisMainWindow::openDocument
(this=this@entry=0x8f515b0, url=...) at
/home/raghu/kf5/src/krita/libs/ui/KisMainWindow.cpp:747
#10 0x00007f377d700b3a in KisMainWindow::dropEvent (this=0x8f515b0,
event=0x7ffc2d1d3db0) at
/home/raghu/kf5/src/krita/libs/ui/KisMainWindow.cpp:1228
#11 0x00007f37772cea58 in QWidget::event(QEvent*) () from
/usr/lib/libQt5Widgets.so.5
#12 0x00007f37773e10db in QMainWindow::event(QEvent*) () from
/usr/lib/libQt5Widgets.so.5
#13 0x00007f37799d81a7 in KMainWindow::event (this=this@entry=0x8f515b0,
ev=ev@entry=0x7ffc2d1d3db0) at
/home/raghu/kf5/src/krita/libs/widgetutils/xmlgui/kmainwindow.cpp:785
#14 0x00007f3779a0f059 in KXmlGuiWindow::event (this=0x8f515b0,
ev=0x7ffc2d1d3db0) at
/home/raghu/kf5/src/krita/libs/widgetutils/xmlgui/kxmlguiwindow.cpp:125
#15 0x00007f377728a68c in QApplicationPrivate::notify_helper(QObject*, QEvent*)
() from /usr/lib/libQt5Widgets.so.5
#16 0x00007f3777290596 in QApplication::notify(QObject*, QEvent*) () from
/usr/lib/libQt5Widgets.so.5
#17 0x00007f377d6cf0e7 in KisApplication::notify (this=<optimized out>,
receiver=0x8f515b0, event=0x7ffc2d1d3db0) at
/home/raghu/kf5/src/krita/libs/ui/KisApplication.cpp:526
#18 0x00007f3776566518 in QCoreApplication::notifyInternal2(QObject*, QEvent*)
() from /usr/lib/libQt5Core.so.5
#19 0x00007f37772ea3b2 in ?? () from /usr/lib/libQt5Widgets.so.5
#20 0x00007f37772eaddb in ?? () from /usr/lib/libQt5Widgets.so.5
#21 0x00007f377728a68c in QApplicationPrivate::notify_helper(QObject*, QEvent*)
() from /usr/lib/libQt5Widgets.so.5
#22 0x00007f377728f8f6 in QApplication::notify(QObject*, QEvent*) () from
/usr/lib/libQt5Widgets.so.5
#23 0x00007f377d6cf0e7 in KisApplication::notify (this=<optimized out>,
receiver=0x9c10bc0, event=0x7ffc2d1d4140) at
/home/raghu/kf5/src/krita/libs/ui/KisApplication.cpp:526
#24 0x00007f3776566518 in QCoreApplication::notifyInternal2(QObject*, QEvent*)
() from /usr/lib/libQt5Core.so.5
#25 0x00007f3776ab1528 in QGuiApplicationPrivate::processDrop(QWindow*,
QMimeData const*, QPoint const&, QFlags<Qt::DropAction>) () from
/usr/lib/libQt5Gui.so.5
#26 0x00007f3776a8efff in QWindowSystemInterface::handleDrop(QWindow*,
QMimeData const*, QPoint const&, QFlags<Qt::DropAction>) () from
/usr/lib/libQt5Gui.so.5
#27 0x00007f376ad6f4f1 in ?? () from /usr/lib/libQt5XcbQpa.so.5
#28 0x00007f376ad79cbe in
QXcbWindow::handleClientMessageEvent(xcb_client_message_event_t const*) () from
/usr/lib/libQt5XcbQpa.so.5
#29 0x00007f376ad66376 in QXcbConnection::handleXcbEvent(xcb_generic_event_t*)
() from /usr/lib/libQt5XcbQpa.so.5
#30 0x00007f376ad66906 in QXcbConnection::processXcbEvents() () from
/usr/lib/libQt5XcbQpa.so.5
#31 0x00007f3776593659 in QObject::event(QEvent*) () from
/usr/lib/libQt5Core.so.5
#32 0x00007f377728a68c in QApplicationPrivate::notify_helper(QObject*, QEvent*)
() from /usr/lib/libQt5Widgets.so.5
#33 0x00007f377728f8f6 in QApplication::notify(QObject*, QEvent*) () from
/usr/lib/libQt5Widgets.so.5
#34 0x00007f377d6cf0e7 in KisApplication::notify (this=<optimized out>,
receiver=0x11fdc90, event=0x7f3764006ef0) at
/home/raghu/kf5/src/krita/libs/ui/KisApplication.cpp:526
#35 0x00007f3776566518 in QCoreApplication::notifyInternal2(QObject*, QEvent*)
() from /usr/lib/libQt5Core.so.5
#36 0x00007f37765683da in QCoreApplicationPrivate::sendPostedEvents(QObject*,
int, QThreadData*) () from /usr/lib/libQt5Core.so.5
#37 0x00007f37765bb883 in ?? () from /usr/lib/libQt5Core.so.5
#38 0x00007f3770bb6d87 in g_main_context_dispatch () from
/usr/lib/libglib-2.0.so.0
#39 0x00007f3770bb6fe0 in ?? () from /usr/lib/libglib-2.0.so.0
#40 0x00007f3770bb708c in g_main_context_iteration () from
/usr/lib/libglib-2.0.so.0
#41 0x00007f37765bbcab in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
from /usr/lib/libQt5Core.so.5
#42 0x00007f37765646fa in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from
/usr/lib/libQt5Core.so.5
#43 0x00007f377656cb7c in QCoreApplication::exec() () from
/usr/lib/libQt5Core.so.5
#44 0x0000000000402fdb in main (argc=1, argv=0x7ffc2d1d4cf8) at
/home/raghu/kf5/src/krita/krita/main.cc:177

Reported using DrKonqi

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