https://bugs.kde.org/show_bug.cgi?id=518318
Bug ID: 518318
Summary: Crash in QToolBar::widgetForAction during
cleanupActions() on Fedora 43 (Qt 6.10.2)
Classification: Applications
Product: digikam
Version First 9.0.0
Reported In:
Platform: Fedora RPMs
OS: Linux
Status: REPORTED
Severity: critical
Priority: NOR
Component: general
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---
Created attachment 191131
--> https://bugs.kde.org/attachment.cgi?id=191131&action=edit
Trace file
Description:
digiKam 9.0.0/9.1.0 is crashing on startup on the current Fedora 43 development
branch. While this may be triggered by a system library regression, the crash
point is within the digiKam core UI handling.
Backtrace Analysis:
The application crashes during the initialization/cleanup phase of the XML GUI.
Plaintext
#0 QToolBar::widgetForAction(QAction*) const () from /lib64/libQt6Widgets.so.6
#1 Digikam::DXmlGuiWindow::cleanupActions() () from
/lib64/libdigikamcore.so.9.0.0
This suggests that cleanupActions() may be interacting with a null or
uninitialized pointer in QToolBar when running against the latest GLib 2.86.4
and Qt 6.10.2 libraries found in Fedora Rawhide.
Steps to Reproduce:
Install Fedora 43 (Rawhide) with updates as of March 28, 2026.
Launch digiKam 9.x.
Observe immediate Segmentation Fault.
Workaround Attempted:
Disabling D-Bus (DBUS_SESSION_BUS_ADDRESS="") prevents the Portal registration
error but does not prevent the QToolBar Segfault, suggesting it is a
fundamental UI rendering/initialization conflict with the new Qt6/GLib stack.
SOFTWARE/OS VERSIONS
Windows:
macOS:
(available in the Info Center app, or by running `kinfo` in a terminal window)
Linux/KDE Plasma: Fedora 43 & Gnome
KDE Plasma Version:
KDE Frameworks Version:
Qt Version:
ADDITIONAL INFORMATION
I filing also a bug report to bugzilla, since the cause most likely on the
Fedora side.
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