Qapitrace Combobox Bug Exploration
This just holds some tests I have made to try to minimally reproduce a bug I am seeing in qapitrace -- a gui tool that accompanies apitrace. The retracer dialog has a combo box that has an entry with text "Run & Check". When the dialog is shown, and the combo box is opened, the "Run & Check" entry is replaced with "Run ...Check".
Running the Tests
- python -m venv venv
- source venv/bin/activate
- python -m pip install -r requirements.txt
- python qapitrace-combobox-elide-bug.py
Versions of Qt that are affected
This bug occurs when building against Qt 5.15.3, 5.15.7, and 5.15.14, and presumably Qt releases between those versions. Those just happened to be the versions I tested.
This bug does not occur when building against Qt 5.15.2 or 6.5.1. Given that Qt 5.15.14 is the latest Qt 5.15 commercial release, it would seem that the bug was introduced in Qt 5.15.3, but fixed sometime on or after Qt 6.0.0.
Reproducing Behavior in Qapitrace
To reproduce the behavior, you must build the qapitrace tool, load a trace file,
and press Ctrl-R or choose menu item Trace->Replay to bring up the dialog in
question.
Here are steps:
- Clone the repo https://github.com/keithel/apitrace/tree/88357d3f2ee9c448b62daf4906ed03c972ab2c13 Branch https://github.com/keithel/apitrace/commits/retracer-config-layout-fix
- Make sure you have a Qt 5.15 build available.
- Follow apitrace build instructions (not too many requirements) with -DENABLE_GUI=ON.
- Start
qapitrace glxgears.trace - Press
Ctrl-Rto bring up the retracer dialog - Open the "Handling" combo box.
Witness the Run ...Check elision that should not occur.