If you encounter a bug, misfeature, or missing feature in GTK, please file a bug report on our GitLab project. You should also file issues if the documentation is out of date with the existing API, or unclear.

Don’t hesitate to file a bug report, even if you think we may know about it already, or aren’t sure of the details. Just give us as much information as you have, and if it’s already fixed or has already been discussed, we’ll add a note to that effect in the report.

The issue tracker should definitely be used for feature requests, it’s not only for bugs. We track all GTK development in GitLab, to ensure that nothing gets lost.