Otherwise, when e.g. doing "<Meta+Up>": "gg" in bindings.key_mappings,
there's a crash like:
Traceback (most recent call last):
File "/usr/lib/python3.9/site-packages/qutebrowser/keyinput/eventfilter.py", line 105, in eventFilter
return handler(typing.cast(QKeyEvent, event))
File "/usr/lib/python3.9/site-packages/qutebrowser/keyinput/eventfilter.py", line 75, in _handle_key_event
return man.handle_event(event)
File "/usr/lib/python3.9/site-packages/qutebrowser/keyinput/modeman.py", line 462, in handle_event
return handler(cast(QKeyEvent, event))
File "/usr/lib/python3.9/site-packages/qutebrowser/keyinput/modeman.py", line 283, in _handle_keypress
match = parser.handle(event, dry_run=dry_run)
File "/usr/lib/python3.9/site-packages/qutebrowser/keyinput/modeparsers.py", line 105, in handle
match = super().handle(e, dry_run=dry_run)
File "/usr/lib/python3.9/site-packages/qutebrowser/keyinput/basekeyparser.py", line 309, in handle
result = self._match_key_mapping(result.sequence)
File "/usr/lib/python3.9/site-packages/qutebrowser/keyinput/basekeyparser.py", line 246, in _match_key_mapping
mapped = sequence.with_mappings(
File "/usr/lib/python3.9/site-packages/qutebrowser/keyinput/keyutils.py", line 675, in with_mappings
assert len(new_seq) == 1
AssertionError
While this isn't the intended way to use this setting, we shouldn't
crash - and let's just make it work instead of forbidding it.
5b6d2c60b4