Errors not displaying when encode fails

[fluffy-critter]

Got the following exception from some incorrect app settings:

Traceback (most recent call last):
  File "/Users/fluffy/projects/bandcrash/bandcrash/__init__.py", line 71, in run_encoder
    subprocess.run([util.ffmpeg_path(),
  File "/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/subprocess.py", line 571, in run
    raise CalledProcessError(retcode, process.args,
subprocess.CalledProcessError: Command '['/Users/fluffy/.pyffmpeg/bin/ffmpeg', '-hide_banner', '-loglevel', 'error', '-i', '/Volumes/home/Music/albums/radio ready/wav/Better Than Before.wav', '-b', '32', '-V', '5', '-q', '5', '-m', 'j', '-y', '/Users/fluffy/Music/asdf/Sockpuppet - Radio Ready/preview/03 Better Than Before.mp3']' returned non-zero exit status 1.

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/fluffy/projects/bandcrash/bandcrash/gui/__init__.py", line 572, in encode_album
    task.result()
  File "/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/concurrent/futures/_base.py", line 449, in result
    return self.__get_result()
           ^^^^^^^^^^^^^^^^^^^
  File "/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/concurrent/futures/_base.py", line 401, in __get_result
    raise self._exception
  File "/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/concurrent/futures/thread.py", line 58, in run
    result = self.fn(*self.args, **self.kwargs)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/fluffy/projects/bandcrash/bandcrash/__init__.py", line 103, in encode_mp3
    run_encoder(in_path, out_path, encode_args)
  File "/Users/fluffy/projects/bandcrash/bandcrash/__init__.py", line 81, in run_encoder
    os.remove(outfile)

For some reason this led to the encode just silently failing with no message dialog appearing.

This happened on v0.5.1-9f31dfe