STEPS TO REPRODUCE
1. Generate large amounts of files in a folder, as little as 60 or more than 1000
2. In left panel, `Files`, navigating to the folder, scrolling down and Elisa crashes.
3. If Elisa didn't crash, increase the amount of files you generated until it crashes.

OBSERVED RESULT

Elisa crashed

EXPECTED RESULT

Elisa doesn't crash

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: ArchLinux
(available in About System)
KDE Plasma Version: 5.20.0
KDE Frameworks Version: 5.7.4
Qt Version: 5.15.1

ADDITIONAL INFORMATION

I tried to solve this myself, but the best I can get is to know it crashes on app.exec(). Which didn't help much. This may not even be a Elisa issue, could be related to baloo.

I compiled debug version from git master, the bug doesn't disappear.


Output:
23:01:16: Starting /home/hany/Dev/C++/Qt/KDE/Desktop/build-elisa-Desktop-Debug/bin/elisa ...
QSocketNotifier: Can only be used with threads started with QThread
Cyclic dependency detected between "file:///usr/lib/qt/qml/org/kde/kirigami.2/styles/org.kde.desktop.plasma/Units.qml" and "file:///usr/lib/qt/qml/org/kde/kirigami.2/styles/org.kde.desktop.plasma/Units.qml"
qrc:/qml/ElisaMainWindow.qml:17:1: QML ElisaMainWindow: Accessible must be attached to an Item
file:///usr/lib/qt/qml/org/kde/kirigami.2/templates/OverlayDrawer.qml:291:5: QML Connections: Implicitly defined onFoo properties in Connections are deprecated. Use this syntax instead: function onFoo(<arguments>) { ... }
file:///usr/lib/qt/qml/org/kde/kirigami.2/templates/AbstractApplicationHeader.qml:153:9: QML Connections: Implicitly defined onFoo properties in Connections are deprecated. Use this syntax instead: function onFoo(<arguments>) { ... }
file:///usr/lib/qt/qml/org/kde/kirigami.2/templates/AbstractApplicationHeader.qml:83:5: QML Connections: Implicitly defined onFoo properties in Connections are deprecated. Use this syntax instead: function onFoo(<arguments>) { ... }
org.kde.elisa.indexers.manager: Local file system indexer is inactive
org.kde.elisa.indexers.manager: Baloo indexer is unavailable
org.kde.elisa.indexers.manager: Baloo indexer is inactive
file:///usr/lib/qt/qml/org/kde/kirigami.2/ContextDrawer.qml:79: TypeError: Cannot call method 'hasOwnProperty' of null
qrc:/qml/ContextView.qml:93:13: QML Image: Failed to get image from provider: image://icon/media-optical-audio
org.kde.elisa.indexers.manager: Baloo indexer is available
org.kde.elisa.indexers.manager: Baloo indexer is active
org.kde.elisa.indexers.manager: trigger init of baloo file indexer
qrc:/qml/NavigationActionBar.qml:134:21: QML Image: Failed to get image from provider: image://icon/arrow-down
qrc:/qml/NavigationActionBar.qml:134:21: QML Image: Failed to get image from provider: image://icon/arrow-down
qrc:/qml/NavigationActionBar.qml:134:21: QML Image: Failed to get image from provider: image://icon/arrow-down
qrc:/qml/NavigationActionBar.qml:134:21: QML Image: Failed to get image from provider: image://icon/arrow-down
qrc:/qml/NavigationActionBar.qml:134:21: QML Image: Failed to get image from provider: image://icon/arrow-down
qrc:/qml/NavigationActionBar.qml:134:21: QML Image: Failed to get image from provider: image://icon/arrow-down
qrc:/qml/ImageWithFallback.qml:36:5: QML Image: Failed to get image from provider: image://icon/folder
KCrash: crashing... crashRecursionCounter = 2
KCrash: Application Name = elisa path = /home/hany/Dev/C++/Qt/KDE/Desktop/build-elisa-Desktop-Debug/bin pid = 32557
KCrash: Arguments: /home/hany/Dev/C++/Qt/KDE/Desktop/build-elisa-Desktop-Debug/bin/elisa 
KCrash: Attempting to start /usr/lib/drkonqi
Unable to start Dr. Konqi
Re-raising signal for core dump handling.
ANOM_ABEND auid=1000 uid=1000 gid=1000 ses=2 pid=32557 comm="elisa" exe="/home/hany/Dev/C++/Qt/KDE/Desktop/build-elisa-Desktop-Debug/bin/elisa" sig=11 res=1
23:02:32: The program has unexpectedly finished.
23:02:32: The process was ended forcefully.
23:02:32: /home/hany/Dev/C++/Qt/KDE/Desktop/build-elisa-Desktop-Debug/bin/elisa crashed.