https://bugs.kde.org/show_bug.cgi?id=454619
Bug ID: 454619
Summary: Threading-related crash in Gwenview in file KIO worker
Product: frameworks-kio
Version: git master
Platform: Other
OS: Linux
Status: REPORTED
Severity: crash
Priority: NOR
Component: general
Assignee: kio-bugs-n...@kde.org
Reporter: k...@privat.broulik.de
CC: kdelibs-b...@kde.org
Target Milestone: ---
Gwenview crashes when closing it while it's still listing directories.
STEPS TO REPRODUCE
1. Open an image in a folder with loads of images (my folder has 4000+ images)
in Gwenview
2. Close Gwenview right away
OBSERVED RESULT
Boom, seems the thread doesn't exit cleanly, exit() is called but we don't wait
for it to finish(?)
EXPECTED RESULT
No boom, threads exit gracefully
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: git master as of 2022-05-30
ADDITIONAL INFORMATION
Thread 1 (Thread 0x7fe77ea4d700 (LWP 75770)):
[KCrash Handler]
#3 QHashNode<KUserId, QString>::same_key (key0=..., h0=1464629782, this=0x41)
at /usr/include/x86_64-linux-gnu/qt5/QtCore/qhash.h:156
#4 QHash<KUserId, QString>::findNode (h=1464629782, akey=...,
this=0x7fe79fc12a30 <staticUserCache>) at
/usr/include/x86_64-linux-gnu/qt5/QtCore/qhash.h:931
#5 QHash<KUserId, QString>::findNode (this=this@entry=0x7fe79fc12a30
<staticUserCache>, akey=..., ahp=ahp@entry=0x0) at
/usr/include/x86_64-linux-gnu/qt5/QtCore/qhash.h:950
#6 0x00007fe79fc06f95 in QHash<KUserId, QString>::find (akey=...,
this=0x7fe79fc12a30 <staticUserCache>) at
/usr/include/x86_64-linux-gnu/qt5/QtCore/qrefcount.h:102
#7 getUserName (uid=...) at ./src/ioslaves/file/file_unix.cpp:174
#8 createUDSEntry (filename=..., path=..., entry=..., details=...,
details@entry=..., fullPath=...) at ./src/ioslaves/file/file_unix.cpp:465
#9 0x00007fe79fc07d34 in FileProtocol::listDir (this=0x7fe76c005010, url=...)
at /usr/include/x86_64-linux-gnu/qt5/QtCore/qstringbuilder.h:164
#10 0x00007fe7b7bd11b6 in KIO::SlaveBase::dispatch (this=0x7fe76c005020,
command=71, data=...) at ./src/core/slavebase.cpp:1283
#11 0x00007fe7b7bd1a06 in KIO::SlaveBase::dispatchLoop (this=0x7fe76c005020) at
./src/core/slavebase.cpp:337
#12 0x00007fe7b7c9fd43 in KIO::WorkerThread::run (this=0x55bee2611130) at
/usr/include/c++/9/bits/unique_ptr.h:360
It always crashes somewhere accessing the staticUserCache in file_unix.cpp
It does not happen with KIO_ENABLE_WORKER_THREADS=0
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