Picard crashes when closing the option window via window controls (the close X in the window's title bar) while the Preferred Releases page is open.

E: 11:37:41,182 /usr/lib/python3.7/site-packages/picard/plugin.plugin_error:261: Plugin 'test' : Traceback (most recent call last):
File "/usr/lib/python3.7/site-packages/picard/plugin.py", line 334, in load_plugin
plugin_module = imp.load_module(_PLUGIN_MODULE_PREFIX + name, *info)
File "/usr/lib/python3.7/imp.py", line 234, in load_module
return load_source(name, filename, file)
File "/usr/lib/python3.7/imp.py", line 171, in load_source
module = _load(spec)
File "<frozen importlib._bootstrap>", line 696, in _load
File "<frozen importlib._bootstrap>", line 677, in _load_unlocked
File "<frozen importlib._bootstrap_external>", line 728, in exec_module
File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
File "/home/phw/.config/MusicBrainz/Picard/plugins/test.py", line 14, in <module>
from picard.file import register_file_post_load_processor
ImportError: cannot import name 'register_file_post_load_processor' from 'picard.file' (/usr/lib/python3.7/site-packages/picard/file.py)

Traceback (most recent call last):
File "/usr/lib/python3.7/site-packages/picard/ui/options/releases.py", line 76, in hideEvent
self.valueChanged.disconnect(self.show_tip)
TypeError: 'method' object is not connected
zsh: abort (core dumped) picard