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hOCR PDF export: prevent users from overwriting any input image PDF file #243

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SantosSi opened this issue Nov 21, 2017 · 9 comments
Closed

hOCR PDF export: prevent users from overwriting any input image PDF file #243

SantosSi opened this issue Nov 21, 2017 · 9 comments
Milestone
3.3.0

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@SantosSi
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@manisandro manisandro added this to the 3.3.0 milestone Nov 25, 2017
@SantosSi
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With the latest QT5 master the following crash dump is put out:
gImageReader 3.2.3 (4a53493)

#0 0x00007fc85501192b in ppoll () from /lib/x86_64-linux-gnu/libc.so.6
#1 0x00007fc8562a60d1 in qt_safe_poll(pollfd*, unsigned long, timespec const*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2 0x00007fc8561d8bb8 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#3 0x00007fc8561ce8fb in QProcess::waitForFinished(int) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4 0x000055942f837a1b in MainWindow::signalHandler(int) ()
#5
#6 0x00007fc858d01977 in Poppler::Page::renderToImage(double, double, int, int, int, int, Poppler::Page::Rotation) const () from /usr/lib/x86_64-linux-gnu/libpoppler-qt5.so.1
#7 0x000055942f826b73 in PDFRenderer::render(int, double) const ()
#8 0x000055942f82944c in Displayer::renderImage() ()
#9 0x000055942f828cf7 in Displayer::setup(int const*, int const*, double const*) ()
#10 0x000055942f87d2eb in HOCRPdfExporter::run() ()
#11 0x000055942f88bbba in OutputEditorHOCR::savePDF() ()
#12 0x000055942f89cad4 in OutputEditorHOCR::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) ()
#13 0x00007fc856280865 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#14 0x00007fc856fc5d82 in QAction::triggered(bool) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#15 0x00007fc856fc846c in QAction::activate(QAction::ActionEvent) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#16 0x00007fc857189aeb in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#17 0x00007fc857189d44 in QAbstractButton::mouseReleaseEvent(QMouseEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#18 0x00007fc85716907a in QToolButton::mouseReleaseEvent(QMouseEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#19 0x00007fc85700cdb8 in QWidget::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#20 0x00007fc857169114 in QToolButton::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#21 0x00007fc856fcc46c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#22 0x00007fc856fd428f in QApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#23 0x00007fc856251d68 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#24 0x00007fc856fd3262 in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer&, bool) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#25 0x00007fc85702793b in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#26 0x00007fc857029faa in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#27 0x00007fc856fcc46c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#28 0x00007fc856fd3d34 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#29 0x00007fc856251d68 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#30 0x00007fc856810f43 in QGuiApplicationPrivate::processMouseEvent(QWindowSystemInterfacePrivate::MouseEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#31 0x00007fc856812a25 in QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#32 0x00007fc8567eacab in QWindowSystemInterface::sendWindowSystemEvents(QFlagsQEventLoop::ProcessEventsFlag) () from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#33 0x00007fc84a5d35a0 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#34 0x00007fc851abbf67 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#35 0x00007fc851abc1a0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#36 0x00007fc851abc22c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#37 0x00007fc8562aa3ff in QEventDispatcherGlib::processEvents(QFlagsQEventLoop::ProcessEventsFlag) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#38 0x00007fc85624fdba in QEventLoop::exec(QFlagsQEventLoop::ProcessEventsFlag) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#39 0x00007fc856258d24 in QCoreApplication::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#40 0x000055942f891951 in main ()

Thread 11 (Thread 0x7fc817955700 (LWP 12280)):
#0 0x00007fc85501183d in poll () from /lib/x86_64-linux-gnu/libc.so.6
#1 0x00007fc83cc2c6b1 in ?? () from /usr/lib/x86_64-linux-gnu/libpulse.so.0
#2 0x00007fc83cc1e070 in pa_mainloop_poll () from /usr/lib/x86_64-linux-gnu/libpulse.so.0
#3 0x00007fc83cc1e700 in pa_mainloop_iterate () from /usr/lib/x86_64-linux-gnu/libpulse.so.0
#4 0x00007fc83cc1e790 in pa_mainloop_run () from /usr/lib/x86_64-linux-gnu/libpulse.so.0
#5 0x00007fc83cc2c5f9 in ?? () from /usr/lib/x86_64-linux-gnu/libpulse.so.0
#6 0x00007fc83bf56c58 in ?? () from /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-11.1.so
#7 0x00007fc8552d9517 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#8 0x00007fc85501b82f in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 10 (Thread 0x7fc818156700 (LWP 12278)):
#0 0x00007fc8552dfb26 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/x86_64-linux-gnu/libpthread.so.0
#1 0x00007fc8560756cb in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2 0x000055942f82b30c in Displayer::scaleThread() ()
#3 0x000055942f830f37 in void std::__invoke_impl<void, void (Displayer::&)(), Displayer&>(std::__invoke_memfun_deref, void (Displayer::&)(), Displayer&) ()
#4 0x000055942f830cfd in std::__invoke_result<void (Displayer::&)(), Displayer&>::type std::__invoke<void (Displayer::&)(), Displayer&>(void (Displayer::&)(), Displayer&) ()
#5 0x000055942f830976 in void std::_Bind<void (Displayer::(Displayer))()>::__call<void, , 0ul>(std::tuple<>&&, std::_Index_tuple<0ul>) ()
#6 0x000055942f82fcd8 in void std::_Bind<void (Displayer::(Displayer))()>::operator()<, void>() ()
#7 0x000055942f82e56e in std::_Function_handler<void (), std::_Bind<void (Displayer::(Displayer))()> >::_M_invoke(std::_Any_data const&) ()
#8 0x000055942f82d334 in std::function<void ()>::operator()() const ()
#9 0x000055942f82cff0 in Displayer::ScaleThread::run() ()
#10 0x00007fc85607429d in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#11 0x00007fc8552d9517 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#12 0x00007fc85501b82f in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 9 (Thread 0x7fc82a251700 (LWP 12275)):
#0 0x00007fc85501183d in poll () from /lib/x86_64-linux-gnu/libc.so.6
#1 0x00007fc8142a3fba in ?? () from /usr/lib/x86_64-linux-gnu/libavahi-common.so.3
#2 0x00007fc8142a3b61 in avahi_simple_poll_run () from /usr/lib/x86_64-linux-gnu/libavahi-common.so.3
#3 0x00007fc8142a3d38 in avahi_simple_poll_iterate () from /usr/lib/x86_64-linux-gnu/libavahi-common.so.3
#4 0x00007fc8142a3f53 in avahi_simple_poll_loop () from /usr/lib/x86_64-linux-gnu/libavahi-common.so.3
#5 0x00007fc8142a4017 in ?? () from /usr/lib/x86_64-linux-gnu/libavahi-common.so.3
#6 0x00007fc8552d9517 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#7 0x00007fc85501b82f in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 8 (Thread 0x7fc818957700 (LWP 12272)):
#0 0x00007fc8552dfb26 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/x86_64-linux-gnu/libpthread.so.0
#1 0x00007fc822ce623b in ?? () from /usr/lib/x86_64-linux-gnu/dri/r600_dri.so
#2 0x00007fc822ce6157 in ?? () from /usr/lib/x86_64-linux-gnu/dri/r600_dri.so
#3 0x00007fc8552d9517 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#4 0x00007fc85501b82f in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 7 (Thread 0x7fc821483700 (LWP 12271)):
#0 0x00007fc8552dfb26 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/x86_64-linux-gnu/libpthread.so.0
#1 0x00007fc822ce623b in ?? () from /usr/lib/x86_64-linux-gnu/dri/r600_dri.so
#2 0x00007fc822ce6157 in ?? () from /usr/lib/x86_64-linux-gnu/dri/r600_dri.so
#3 0x00007fc8552d9517 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#4 0x00007fc85501b82f in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 6 (Thread 0x7fc829a50700 (LWP 12270)):
#0 0x00007fc85501183d in poll () from /lib/x86_64-linux-gnu/libc.so.6
#1 0x00007fc851abc119 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2 0x00007fc851abc22c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3 0x00007fc8562aa3ff in QEventDispatcherGlib::processEvents(QFlagsQEventLoop::ProcessEventsFlag) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4 0x00007fc85624fdba in QEventLoop::exec(QFlagsQEventLoop::ProcessEventsFlag) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5 0x00007fc85606f3ca in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6 0x00007fc85607429d in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7 0x00007fc8552d9517 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#8 0x00007fc85501b82f in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 5 (Thread 0x7fc831551700 (LWP 12268)):
#0 0x00007fc85501183d in poll () from /lib/x86_64-linux-gnu/libc.so.6
#1 0x00007fc831561baf in ?? () from /lib/x86_64-linux-gnu/libusb-1.0.so.0
#2 0x00007fc8552d9517 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#3 0x00007fc85501b82f in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 4 (Thread 0x7fc83217f700 (LWP 12267)):
#0 0x00007fc8552dfb26 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/x86_64-linux-gnu/libpthread.so.0
#1 0x00007fc8560756cb in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2 0x000055942f897222 in Utils::AsyncQueueScannerSane::Request::dequeue() ()
#3 0x000055942f891e5e in ScannerSane::run() ()
#4 0x000055942f89ce53 in ScannerSane::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) ()
#5 0x00007fc856280865 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6 0x00007fc85606e127 in QThread::started(QThread::QPrivateSignal) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7 0x00007fc856074284 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8 0x00007fc8552d9517 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#9 0x00007fc85501b82f in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 3 (Thread 0x7fc839410700 (LWP 12266)):
#0 0x00007fc85501183d in poll () from /lib/x86_64-linux-gnu/libc.so.6
#1 0x00007fc851abc119 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2 0x00007fc851abc22c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3 0x00007fc8562aa3ff in QEventDispatcherGlib::processEvents(QFlagsQEventLoop::ProcessEventsFlag) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4 0x00007fc85624fdba in QEventLoop::exec(QFlagsQEventLoop::ProcessEventsFlag) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5 0x00007fc85606f3ca in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6 0x00007fc857b7ce45 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#7 0x00007fc85607429d in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8 0x00007fc8552d9517 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#9 0x00007fc85501b82f in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 2 (Thread 0x7fc847c47700 (LWP 12265)):
#0 0x00007fc85501183d in poll () from /lib/x86_64-linux-gnu/libc.so.6
#1 0x00007fc84bf42150 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2 0x00007fc84bf43ee9 in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3 0x00007fc84a570f09 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4 0x00007fc85607429d in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5 0x00007fc8552d9517 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#6 0x00007fc85501b82f in clone () from /lib/x86_64-linux-gnu/libc.so.6

Thread 1 (Thread 0x7fc859acb540 (LWP 12264)):
#0 0x00007fc85501192b in ppoll () from /lib/x86_64-linux-gnu/libc.so.6
#1 0x00007fc8562a60d1 in qt_safe_poll(pollfd*, unsigned long, timespec const*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2 0x00007fc8561d8bb8 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#3 0x00007fc8561ce8fb in QProcess::waitForFinished(int) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4 0x000055942f837a1b in MainWindow::signalHandler(int) ()
#5
#6 0x00007fc858d01977 in Poppler::Page::renderToImage(double, double, int, int, int, int, Poppler::Page::Rotation) const () from /usr/lib/x86_64-linux-gnu/libpoppler-qt5.so.1
#7 0x000055942f826b73 in PDFRenderer::render(int, double) const ()
#8 0x000055942f82944c in Displayer::renderImage() ()
#9 0x000055942f828cf7 in Displayer::setup(int const*, int const*, double const*) ()
#10 0x000055942f87d2eb in HOCRPdfExporter::run() ()
#11 0x000055942f88bbba in OutputEditorHOCR::savePDF() ()
#12 0x000055942f89cad4 in OutputEditorHOCR::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) ()
#13 0x00007fc856280865 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#14 0x00007fc856fc5d82 in QAction::triggered(bool) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#15 0x00007fc856fc846c in QAction::activate(QAction::ActionEvent) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#16 0x00007fc857189aeb in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#17 0x00007fc857189d44 in QAbstractButton::mouseReleaseEvent(QMouseEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#18 0x00007fc85716907a in QToolButton::mouseReleaseEvent(QMouseEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#19 0x00007fc85700cdb8 in QWidget::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#20 0x00007fc857169114 in QToolButton::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#21 0x00007fc856fcc46c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#22 0x00007fc856fd428f in QApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#23 0x00007fc856251d68 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#24 0x00007fc856fd3262 in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer&, bool) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#25 0x00007fc85702793b in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#26 0x00007fc857029faa in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#27 0x00007fc856fcc46c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#28 0x00007fc856fd3d34 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#29 0x00007fc856251d68 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#30 0x00007fc856810f43 in QGuiApplicationPrivate::processMouseEvent(QWindowSystemInterfacePrivate::MouseEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#31 0x00007fc856812a25 in QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#32 0x00007fc8567eacab in QWindowSystemInterface::sendWindowSystemEvents(QFlagsQEventLoop::ProcessEventsFlag) () from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#33 0x00007fc84a5d35a0 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#34 0x00007fc851abbf67 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#35 0x00007fc851abc1a0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#36 0x00007fc851abc22c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#37 0x00007fc8562aa3ff in QEventDispatcherGlib::processEvents(QFlagsQEventLoop::ProcessEventsFlag) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#38 0x00007fc85624fdba in QEventLoop::exec(QFlagsQEventLoop::ProcessEventsFlag) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#39 0x00007fc856258d24 in QCoreApplication::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#40 0x000055942f891951 in main ()

@manisandro
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This isn't really related to this ticket, please file a new issue (or you can also send it per PM). Please also describe what you were doing and whether it is reproducible.

@SantosSi
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The crash report was the result when I tried what I described in the title: I tried to overwrite the original PDF = the input image with the PDF output of the hOCR.

@manisandro
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Ahhh, ok all good then sorry. I though you were testing the feature (which I haven't even implemented yet).

@SantosSi
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Test update before implementation: Overwrote the second input PDF file. The newest Qt5 master from today does not crash, but complains about a defect PDF file, obviously when the export tries to access that file for input.

@manisandro
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It is probably pretty random whether it crashes or not, depends in which instant the file is being accessed.

manisandro added a commit that referenced this issue Nov 30, 2017
@manisandro
[Qt] Don't allow overwriting an input source when exporting to PDF (#243
c4614cf 
)
@manisandro
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Implemented for Qt.

@SantosSi
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SantosSi commented Dec 3, 2017

Tested in Qt5 version: OK.

zamazan4ik pushed a commit that referenced this issue Dec 16, 2017
@manisandro @zamazan4ik
[Qt] Don't allow overwriting an input source when exporting to PDF (#243
ff2d64a 
)
@manisandro
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Done also fro gtk.

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