53 lines
2.3 KiB
Diff
53 lines
2.3 KiB
Diff
commit 415d519e825a6b8b64d2ef5f9a8e9bf7a458d1d0 (HEAD -> master, origin/master, origin/HEAD)
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Author: Adriaan de Groot <groot@kde.org>
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Date: Mon Apr 19 22:39:44 2021 +0200
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Fix crash-on-exit on FreeBSD
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Scenario:
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- start krusader
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- close the application (alt-f4, or click the window-close button)
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- SEGV, with this (edited) backtrace:
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#0 KUrlNavigator::editor (this=0x80a562400)
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#1 0x000000000031e20e in ListPanel::eventFilter (this=0x80c2309c0, watched=0x80a6980d0, e=0x7fffffffc278)
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#6 0x00000008018c3c0c in QWidget::~QWidget() () from /usr/local/lib/qt5/libQt5Widgets.so.5
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#7 0x0000000800a26c4e in KUrlComboBox::~KUrlComboBox (this=0x80a6980d0)
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#11 0x00000008005de60b in KUrlNavigator::~KUrlNavigator (this=0x80a562400)
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#13 0x000000000031d5a5 in ListPanel::~ListPanel (this=0x80c2309c0)
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Analysis:
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- During the destructor, events are triggered, which hit the
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event-filter function in the object that is undergoing destruction.
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Since some of the objects referred to via pointer in the event-filter
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are dead or being-destroyed, this is UB (so be glad it crashes!).
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- This is very similar to the problem and backtrace in KIO commit
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a8a2c08014484145a4bd2a541a1cbeb8be856bf1.
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Fix:
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- Uninstall the event-filter before carrying on with destruction.
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- While here, add an extra nullptr check for the combobox in
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the event-filter.
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diff --git krusader/Panel/listpanel.cpp krusader/Panel/listpanel.cpp
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index 6f57c321..6a0914c6 100644
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--- krusader/Panel/listpanel.cpp
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+++ krusader/Panel/listpanel.cpp
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@@ -380,6 +380,8 @@ ListPanel::ListPanel(QWidget *parent, AbstractPanelManager *manager, const KConf
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ListPanel::~ListPanel()
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{
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+ view->widget()->removeEventFilter(this);
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+ urlNavigator->editor()->removeEventFilter(this);
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cancelProgress();
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delete view;
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view = nullptr;
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@@ -527,7 +529,7 @@ bool ListPanel::eventFilter(QObject * watched, QEvent * e)
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}
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}
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// handle URL navigator key events
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- else if(watched == urlNavigator->editor()) {
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+ else if(urlNavigator && watched == urlNavigator->editor()) {
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// override default shortcut for panel focus
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if(e->type() == QEvent::ShortcutOverride) {
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auto *ke = dynamic_cast<QKeyEvent *>(e);
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