Link to issue number:

Fixes #15391
Fixup of #15163

Summary of the issue:

Since #15163, it is much more likely that braille tries to update a region for an object that no longer exists. This is no problem at all, however in that case, the region should simply be ignored for updating and a debug warning should be logged instead.

Description of user facing changes

No errors in de log while browsing

Description of development approach

a try/except around region.update, with an extra check to avoid updating regions for tree interceptors that have died.

Testing strategy:

Browsed with Firefox for some minutes, wasn't able to reproduce the issue any longer.

Known issues with pull request:

None known

Change log entries:

None needed

Code Review Checklist:

• Pull Request description:
  • description is up to date
  • change log entries
• Testing:
  • Unit tests
  • System (end to end) tests
  • Manual testing
• API is compatible with existing add-ons.
• Documentation:
  • User Documentation
  • Developer / Technical Documentation
  • Context sensitive help for GUI changes
• UX of all users considered:
  • Speech
  • Braille
  • Low Vision
  • Different web browsers
  • Localization in other languages / culture than English
• Security precautions taken.