> On Авг. 8, 2015, 10:51 д.п., David Edmundson wrote: > > are there any bug reports on those crashes? > > > > Do you have commit access, can you push to Plasma/5.4 branch too
I don't know if there are any bug reports, I found this bug by accident. I don't have commit access, could you please push it for me? - Maxim ----------------------------------------------------------- This is an automatically generated e-mail. To reply, visit: https://git.reviewboard.kde.org/r/124659/#review83556 ----------------------------------------------------------- On Авг. 8, 2015, 10:39 д.п., Maxim Mikityanskiy wrote: > > ----------------------------------------------------------- > This is an automatically generated e-mail. To reply, visit: > https://git.reviewboard.kde.org/r/124659/ > ----------------------------------------------------------- > > (Updated Авг. 8, 2015, 10:39 д.п.) > > > Review request for Plasma. > > > Repository: plasma-desktop > > > Description > ------- > > There are two scenarios that lead to segfault in kcm_keyboard. > > 1. Run kcmshell5 keyboard; switch to the second tab; in layouts table > double-click on item in third column so that combo box appears; click on > empty space in layouts table; [Preview] button does not get deactivated; > click on that button and see kcm_keyboard crashing. > 2. Run kcmshell5 keyboard; switch to the second tab; modify something so that > [Reset] button becomes active; select any row in layouts table; click on > [Reset]; row becomes deselected, but [Preview] button is still active; click > on that button and see kcm_keyboard crashing. > > [Preview] button should become inactive when no rows are selected, but in > these two scenarios it doesn't. KCMKeyboardWidget::layoutSelectionChanged > slot does not get called in these two cases. What happens in described cases: > > 1. layoutsTableModel emits dataChanged signal. KCMKeyboardWidget::uiChanged > slot gets called. LayoutsTableModel::refresh is called, then in > QAbstractItemModel::endResetModel modelReset signal is emitted, > QAbstractItemView::reset slot gets called, and it calls > QItemSelectionModel::reset. QItemSelectionModel::reset disables signals and > calls QItemSelectionModel::clear that calls > QItemSelectionModel::clearSelection, but signals are disabled, so > itemSelectionChanged is not emitted, and > KCMKeyboardWidget::layoutSelectionChanged is not called. > 2. KCMKeyboard::load calls KCMKeyboardWidget::updateUI that calls > LayoutsTableModel::refresh. All following calls are in the same order as in > case 1. > > I propose to call KCMKeyboardWidget::layoutSelectionChanged manually after > problematic refreshes to update buttons state. It's not the best fix, there > still may be places where manual call of layoutSelectionChanged is needed, > but at least it fixes two segfaults. > > > Diffs > ----- > > kcms/keyboard/kcm_keyboard_widget.cpp 78ec60b > > Diff: https://git.reviewboard.kde.org/r/124659/diff/ > > > Testing > ------- > > > Thanks, > > Maxim Mikityanskiy > >
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