Description of problem:
Per https://bugzilla.redhat.com/show_bug.cgi?id=2378661#c0, I invoked this application from an SSH client on postmarketOS. The cause of the problem appears to be that $DISPLAY is unset. It solely appears to affect Qt-based applications (not merely KDE Frameworks-based ones). However, it doesn't affect all, for VLC copes fine. (Likewise, the GTK3-based Chromium and Inkscape cope.)

Version-Release number of selected component:
kdiskmark-3.1.4-7.fc42

Additional info:
reporter:       libreport-2.17.15
type:           CCpp
reason:         kdiskmark killed by SIGABRT
journald_cursor: s=c1f108f1ef4e48808a377c0a73f168fc;i=864ea6;b=9a2a7e1fe91e4e5bb9e946b734c27a2b;m=1fd02db89;t=6396dd71d8a12;x=eae6cf7ba185558
executable:     /usr/bin/kdiskmark
cmdline:        kdiskmark
cgroup:         0::/user.slice/user-1000.slice/session-5.scope
rootdir:        /
uid:            1000
kernel:         6.15.4-200.fc42.x86_64
package:        kdiskmark-3.1.4-7.fc42
runlevel:       N 5
backtrace_rating: 4
crash_function: qt_message_fatal
comment:        Per https://bugzilla.redhat.com/show_bug.cgi?id=2378661#c0, I invoked this application from an SSH client on postmarketOS. The cause of the problem appears to be that $DISPLAY is unset. It solely appears to affect Qt-based applications (not merely KDE Frameworks-based ones). However, it doesn't affect all, for VLC copes fine. (Likewise, the GTK3-based Chromium and Inkscape cope.)

Truncated backtrace:
Thread no. 1 (10 frames)
 #4 qt_message_fatal at global/qlogging.cpp:1927
 #5 QMessageLogger::fatal at global/qlogging.cpp:900
 #6 init_platform at kernel/qguiapplication.cpp:1254
 #7 QGuiApplicationPrivate::createPlatformIntegration at kernel/qguiapplication.cpp:1477
 #8 QGuiApplicationPrivate::createEventDispatcher at kernel/qguiapplication.cpp:1494
 #9 QCoreApplicationPrivate::init at kernel/qcoreapplication.cpp:835
 #10 QGuiApplicationPrivate::init at kernel/qguiapplication.cpp:1523
 #11 QApplicationPrivate::init at kernel/qapplication.cpp:513
 #12 QApplication::QApplication at kernel/qapplication.cpp:501
 #13 SingleApplication::SingleApplication at /usr/src/debug/kdiskmark-3.1.4-7.fc42.x86_64/src/singleapplication/singleapplication.cpp:39