Grammar loading/unloading breaks during waking/sleeping with newer dragonfly versions

[codebold]

I'm using a customized version of dragonfly, as i need some adoptions for the neo2 keyboard layout. The requirement for dragonfly in caster is dragonfly2>=0.29.0. After switching to the latest version, the sleeping/waking functionality is broken. Whenever i put caster into sleep, the following error emerges and the process is killed.

engine (INFO): Loading grammar _recobs_grammar
Caster: Microphone is sleeping
Exception in thread Thread-1 (_reader_thread):
Traceback (most recent call last):
  File "/usr/lib/python3.10/threading.py", line 1016, in _bootstrap_inner
    self.run()
  File "/usr/lib/python3.10/threading.py", line 953, in run
    self._target(*self._args, **self._kwargs)
  File "/dragonfly/dragonfly/engines/backend_kaldi/audio.py", line 110, in _reader_thread
    in_data, overflowed = self.stream.read(self.stream.blocksize)
  File "/.venv/lib/python3.10/site-packages/sounddevice.py", line 1196, in read
    _check(err)
  File "/.venv/lib/python3.10/site-packages/sounddevice.py", line 2653, in _check
    raise PortAudioError(errormsg, err)
sounddevice.PortAudioError: Stream is stopped [PaErrorCode -9983]
Traceback (most recent call last):
  File "/usr/lib/python3.10/runpy.py", line 196, in _run_module_as_main
    return _run_code(code, main_globals, None,
  File "/usr/lib/python3.10/runpy.py", line 86, in _run_code
    exec(code, run_globals)
  File "/dragonfly/dragonfly/__main__.py", line 509, in <module>
    main()
  File "/dragonfly/dragonfly/__main__.py", line 504, in main
    return_code = func(args)
  File "/dragonfly/dragonfly/__main__.py", line 246, in cli_cmd_load
    _do_recognition(engine, args)
  File "/dragonfly/dragonfly/__main__.py", line 156, in _do_recognition
    engine.do_recognition()
  File "/dragonfly/dragonfly/engines/base/engine.py", line 251, in do_recognition
    self._do_recognition(*args, **kwargs)
  File "/dragonfly/dragonfly/engines/backend_kaldi/engine.py", line 434, in _do_recognition
    self.prepare_for_recognition()  # Do any of this leftover, now that phrase is done
  File "/dragonfly/dragonfly/engines/backend_kaldi/engine.py", line 332, in prepare_for_recognition
    operation()
  File "/dragonfly/dragonfly/engines/backend_kaldi/engine.py", line 246, in load
    kaldi_rule.load(lazy=self._compiler.lazy_compilation)
  File "/.venv/lib/python3.10/site-packages/kaldi_active_grammar/compiler.py", line 152, in load
    if self.destroyed: raise KaldiError("Cannot use a KaldiRule after calling destroy()")
kaldi_active_grammar.KaldiError: Cannot use a KaldiRule after calling destroy()

I know that this error might be caused by changes to dragonfly or kaldi_active_grammar, but i'm not familiar with the code base and maybe you encountered this error already or know at first glance what is wrong here.

Thanks for looking into this!

[codebold]

Downgrading to dragonfly 0.35.0 resolved the issue for me. For me the error emerges with all versions >= 1.0.0-rc1 of dragonfly.

[LexiconCode]

Thank you for reporting this! I'm able to reproduce the issue.