[okular] [Bug 435626] New: Okular crashes when trying to modify a form-pdf

[Emanuele Spirito]

https://bugs.kde.org/show_bug.cgi?id=435626

            Bug ID: 435626
           Summary: Okular crashes when trying to modify a form-pdf
           Product: okular
           Version: 1.11.1
          Platform: Fedora RPMs
                OS: Linux
            Status: REPORTED
          Keywords: drkonqi
          Severity: crash
          Priority: NOR
         Component: general
          Assignee: okular-devel at kde.org
          Reporter: emaster987 at gmail.com
  Target Milestone: ---

Application: okular (1.11.1)

Qt Version: 5.15.2
Frameworks Version: 5.79.0
Operating System: Linux 5.11.11-200.fc33.x86_64 x86_64
Windowing system: X11
Distribution: Fedora 33 (KDE Plasma)

-- Information about the crash:
- What I was doing when the application crashed:
I opened a pdf with okular. The pdf has been opened correctly. The pdf
contained a form, so I used the suggestion (Visualize->See forms) to start the
modify-mode. When entered the modify-mode, I saw changing font of the form
field. So, I clicked on one field and okular crashed. 
Something odd I noticed is that not all the form field of the pdf were marked
up as form field while in the modify-mode. Indeed I opened the same pdf-form
with Chromium and there I could see many more fields than the ones seen in
okular.

The crash can be reproduced every time.

-- Backtrace:
Application: Okular (okular), signal: Segmentation fault

[KCrash Handler]
#4  0x00007f75b0361bf1 in Poppler::Document::formCalculateOrder() const () from
/lib64/libpoppler-qt5.so.1
#5  0x00007f75b03e3d4f in PDFGenerator::metaData(QString const&, QVariant
const&) const () from
/usr/lib64/qt5/plugins/okular/generators/okularGenerator_poppler.so
#6  0x00007f75b3560a61 in Okular::Document::metaData(QString const&, QVariant
const&) const () from /lib64/libOkular5Core.so.9
#7  0x00007f75b3550343 in Okular::DocumentPrivate::recalculateForms() () from
/lib64/libOkular5Core.so.9
#8  0x00007f75b3576fd7 in Okular::EditFormButtonsCommand::redo() () from
/lib64/libOkular5Core.so.9
#9  0x00007f75ccd1019a in QUndoStack::push(QUndoCommand*) () from
/lib64/libQt5Widgets.so.5
#10 0x00007f75cbe8f386 in void doActivate<false>(QObject*, int, void**) () from
/lib64/libQt5Core.so.5
#11 0x00007f75b81bd4b2 in
FormWidgetsController::slotButtonClicked(QAbstractButton*) () from
/usr/lib64/qt5/plugins/okularpart.so
#12 0x00007f75cbe8f386 in void doActivate<false>(QObject*, int, void**) () from
/lib64/libQt5Core.so.5
#13 0x00007f75cca765d3 in QButtonGroup::buttonClicked(QAbstractButton*) () from
/lib64/libQt5Widgets.so.5
#14 0x00007f75cca71d7f in QAbstractButtonPrivate::emitClicked() () from
/lib64/libQt5Widgets.so.5
#15 0x00007f75cca73673 in QAbstractButtonPrivate::click() () from
/lib64/libQt5Widgets.so.5
#16 0x00007f75cca73855 in QAbstractButton::mouseReleaseEvent(QMouseEvent*) ()
from /lib64/libQt5Widgets.so.5
#17 0x00007f75cc9c2b1e in QWidget::event(QEvent*) () from
/lib64/libQt5Widgets.so.5
#18 0x00007f75cc981ec3 in QApplicationPrivate::notify_helper(QObject*, QEvent*)
() from /lib64/libQt5Widgets.so.5
#19 0x00007f75cc988eeb in QApplication::notify(QObject*, QEvent*) () from
/lib64/libQt5Widgets.so.5
#20 0x00007f75cbe5fbd8 in QCoreApplication::notifyInternal2(QObject*, QEvent*)
() from /lib64/libQt5Core.so.5
#21 0x00007f75cc987efa in QApplicationPrivate::sendMouseEvent(QWidget*,
QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&, bool, bool) ()
from /lib64/libQt5Widgets.so.5
#22 0x00007f75cc9db375 in QWidgetWindow::handleMouseEvent(QMouseEvent*) () from
/lib64/libQt5Widgets.so.5
#23 0x00007f75cc9de6be in QWidgetWindow::event(QEvent*) () from
/lib64/libQt5Widgets.so.5
#24 0x00007f75cc981ec3 in QApplicationPrivate::notify_helper(QObject*, QEvent*)
() from /lib64/libQt5Widgets.so.5
#25 0x00007f75cbe5fbd8 in QCoreApplication::notifyInternal2(QObject*, QEvent*)
() from /lib64/libQt5Core.so.5
#26 0x00007f75cc328143 in
QGuiApplicationPrivate::processMouseEvent(QWindowSystemInterfacePrivate::MouseEvent*)
() from /lib64/libQt5Gui.so.5
#27 0x00007f75cc3098cc in
QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>)
() from /lib64/libQt5Gui.so.5
#28 0x00007f75ba55e47e in xcbSourceDispatch(_GSource*, int (*)(void*), void*)
() from /lib64/libQt5XcbQpa.so.5
#29 0x00007f75ca63fa9f in g_main_context_dispatch () from
/lib64/libglib-2.0.so.0
#30 0x00007f75ca691a98 in g_main_context_iterate.constprop () from
/lib64/libglib-2.0.so.0
#31 0x00007f75ca63ce73 in g_main_context_iteration () from
/lib64/libglib-2.0.so.0
#32 0x00007f75cbeac6f3 in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
from /lib64/libQt5Core.so.5
#33 0x00007f75cbe5e57b in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from
/lib64/libQt5Core.so.5
#34 0x00007f75cbe661b4 in QCoreApplication::exec() () from
/lib64/libQt5Core.so.5
#35 0x000055d0165be8ce in main ()
[Inferior 1 (process 3678) detached]

The reporter indicates this bug may be a duplicate of or related to bug 234280.

Possible duplicates by query: bug 395029, bug 366785, bug 366617, bug 334348,
bug 332693.

Reported using DrKonqi

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