https://bugs.kde.org/show_bug.cgi?id=524694
Bug ID: 524694
Summary: Crash generating file previews on FUSE-mounted remote
folder (rclone)
Classification: Applications
Product: dolphin
Version First 26.08.0
Reported In:
Platform: Other
OS: Linux
Status: REPORTED
Severity: crash
Priority: NOR
Component: general
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Target Milestone: ---
Environment: Fedora 44, KDE Plasma (Wayland), Dolphin 26.08.0, KDE Frameworks
6.29.0, Qt 6.11.1
Steps to reproduce:
1. Mount a remote filesystem via FUSE (e.g. rclone mount for Google Drive)
2. Browse the mount in Dolphin with preview generation enabled
3. Dolphin crashes while generating/failing a thumbnail preview
Backtrace (main thread):
KIO::PreviewJob::failed()
→ KFileItemModelRolesUpdater::slotPreviewFailed()
→ applyResolvedRoles() → rolesData()
→ KFileItem::overlays() → checkDesktopFile()
→ QMimeDatabasePrivate::mimeInherits()
→ QBasicMutex::lockInternal() [aborts]
Notes: Appears to be a locking/threading issue triggered when a preview job
fails and the failure-handling path (checkDesktopFile) queries QMimeDatabase
while it's already locked elsewhere.
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