0000323: Crash on change label color - MantisBT

ID	Project	Category	View Status	Date Submitted	Last Update

0000323	QElectroTech	Diagram Editor	public	2025-05-27 13:53	2025-10-22 23:24

Reporter	Leonardo da Silva	Assigned To
Priority	high	Severity	major	Reproducibility	always
Status	new	Resolution	open
OS	winnt - x86_64	OS Version	Windows 11

Summary	0000323: Crash on change label color
Description	After saving a project, if I edit the color of a label (text element) and confirm the change by pressing Enter, QElectroTech crashes immediately. This does not happen if I confirm the change by clicking "OK" with the mouse.
Steps To Reproduce	Open any project in QElectroTech. Make a change and save the project. Select a label (text element) and open the color settings (font or background). Change the color and confirm the dialog by pressing Enter. The program closes instantly without any error message.
Additional Information	Reproducibility: Always, after saving Severity: High (risk of data loss if not saved before the crash)
Tags	No tags attached.
Attached Files	Bug on change color.mp4 (3,743,077 bytes) Bug on change color.mp4 (3,743,077 bytes)

Leonardo da Silva 2025-05-27 14:32 reporter ~0000798	Including video showing the full screen Bug on change color-2.mp4 (4,034,143 bytes) Bug on change color-2.mp4 (4,034,143 bytes)

plc-user 2025-05-30 08:06 developer ~0000799 Last edited: 2025-05-30 08:10	I can reproduce the error with latest QET 0.100-dev on Debian GNU/Linux When starting from commandline, I see this message on screen, when crashing: Warning: QObject::installEventFilter(): Cannot filter events for objects in a different thread. (:0, ) followed by "segfault" The message can also be found in log-file. Menu --> Help --> About QElectroTech --> TAB "log" --> scroll back to time of crash

black_sun 2025-10-20 23:39 developer ~0000824	I can't reproduce the bug on my debian (gnome). plc-user what is it your desktop environment ?

plc-user 2025-10-22 21:03 developer ~0000825	In May I could reproduce the crash with Debian stable/Bookworm (LXQt) and Debian unstable/Trixie (xfce4). Now on Debian stable/Trixie (LXQt) and unstable/Forky (xfce4) QET does not crash anymore, when changing colour of Textfields as described above.

plc-user 2025-10-22 23:24 developer ~0000826	In my local copy of sources, I noted this in line 1912 of sources/ui/dynamicelementtextmodel.cpp `return QStyledItemDelegate::eventFilter(object, event); // plc-user: crash on selecting new color by pressing <Enter> // after this warning: // Warning: QObject::installEventFilter(): Cannot filter events for objects in a different thread. (:0, ) // --> Segmentation Fault` but could not figure out, which event(s) are responsible

Date Modified	Username	Field	Change
2025-05-27 13:53	Leonardo da Silva	New Issue
2025-05-27 13:53	Leonardo da Silva	File Added: Bug on change color.mp4
2025-05-27 14:32	Leonardo da Silva	Note Added: 0000798
2025-05-27 14:32	Leonardo da Silva	File Added: Bug on change color-2.mp4
2025-05-30 08:06	plc-user	Note Added: 0000799
2025-05-30 08:10	plc-user	Note Edited: 0000799
2025-10-20 23:39	black_sun	Note Added: 0000824
2025-10-22 21:03	plc-user	Note Added: 0000825
2025-10-22 23:24	plc-user	Note Added: 0000826