https://github.com/metabrainz/picard/pull/2648

https://github.com/metabrainz/picard/pull/2648#issuecomment-3689609730

This broke things for me when the file is just called 1.opus, which is how I name tracks between ripping and tagging.
 {{Picard terminated unexpectedly
Traceback (most recent call last):
File "/usr/lib/python3.13/site-packages/picard/tagger.py", line 790, in event
event.run()
~~~~~~~~~^^
File "/usr/lib/python3.13/site-packages/picard/util/thread.py", line 54, in run
self.func(*self.args, **self.kwargs)
~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3.13/site-packages/picard/file.py", line 299, in _loading_finished
self._copy_loaded_metadata(result, postprocessors)
~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3.13/site-packages/picard/file.py", line 313, in _copy_loaded_metadata
processor(metadata)
~~~~~~~~~^^^^^^^^^^
File "/usr/lib/python3.13/site-packages/picard/file.py", line 320, in _guess_tracknumber_and_title
guessed = tracknum_and_title_from_filename(self.base_filename)
File "/usr/lib/python3.13/site-packages/picard/util/_init_.py", line 658, in tracknum_and_title_from_filename
dot_offset = 1 if stripped_filename[tnlen:][0] == '.' else 0
~~~~~~~~~~~~~~~~~~~~~~~~~^^^
IndexError: string index out of range}}