zero plugin causes infinite recursion error

[casens5]

enabling the zero plugin causes an infinite recursion error for (i think) all tag modification commands.

Problem

Running this command in verbose (-vv) mode:

$beet -vv modify geith alive title="alive"

Led to this problem:

user configuration: /home/keltoj/.config/beets/config.yaml
data directory: /home/keltoj/.config/beets
plugin paths: 
inline: adding item field art
inline: adding item field alb
inline: adding item field tit
inline: adding item field yr
Sending event: pluginload
library database: /home/keltoj/.config/beets/library.db
library directory: /home/keltoj/music
Sending event: library_opened
Parsed query: AndQuery([AnyFieldQuery('geith', ('artist', 'title', 'comments', 'album', 'albumartist', 'genre'), SubstringQuery), AnyFieldQuery('alive', ('artist', 'title', 'comments', 'album', 'albumartist', 'genre'), SubstringQuery)])
Parsed sort: NullSort()
Modifying 1 items.
chris geith - invisible reality - 03 - alive
  title: 03 - alive -> alive
Really modify, move and write tags? (Yes/no/select) yes

Sending event: write
zero: composer:  -> None
zero: arranger:  -> None
zero: isrc:  -> None
zero: lyrics:  -> None
zero: mb_trackid:  -> None
zero: art:  -> None
zero: comments:  -> None
zero: original_year: 0 -> None
zero: tracktotal: 0 -> None
zero: images:  -> None
Sending event: after_write
moving /home/keltoj/music/chris_geith/2021_invisible_reality/03_03_-_alive.mp3 to synchronize path
Parsed query: AndQuery([NoneQuery('album_id', True)])
Parsed sort: NullSort()
Parsed query: AndQuery([BooleanQuery('comp', 1, fast=True)])
Parsed sort: NullSort()
Traceback (most recent call last):
  File "/home/keltoj/.pyenv/versions/3.11.1/lib/python3.11/site-packages/beets/util/functemplate.py", line 563, in substitute
    res = self.compiled(values, functions)
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/keltoj/.pyenv/versions/3.11.1/lib/python3.11/site-packages/beets/util/functemplate.py", line 587, in wrapper_func
    args[VARIABLE_PREFIX + varname] = values[varname]
                                      ~~~~~~^^^^^^^^^
  File "/home/keltoj/.pyenv/versions/3.11.1/lib/python3.11/site-packages/beets/library.py", line 483, in __getitem__
    value = self._get(key)
            ^^^^^^^^^^^^^^
  File "/home/keltoj/.pyenv/versions/3.11.1/lib/python3.11/site-packages/beets/library.py", line 471, in _get
    return self._get_formatted(self.model, key)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/keltoj/.pyenv/versions/3.11.1/lib/python3.11/site-packages/beets/dbcore/db.py", line 134, in _get_formatted
    value = model._type(key).format(model.get(key))
                                    ^^^^^^^^^^^^^^
  File "/home/keltoj/.pyenv/versions/3.11.1/lib/python3.11/site-packages/beets/library.py", line 739, in get
    return self._get(key, default, raise_=with_album)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/keltoj/.pyenv/versions/3.11.1/lib/python3.11/site-packages/beets/dbcore/db.py", line 433, in _get
    return getters[key](self)
           ^^^^^^^^^^^^^^^^^^
  File "/home/keltoj/.pyenv/versions/3.11.1/lib/python3.11/site-packages/beetsplug/inline.py", line 109, in _expr_func
    values = _dict_for(obj)
             ^^^^^^^^^^^^^^
  File "/home/keltoj/.pyenv/versions/3.11.1/lib/python3.11/site-packages/beetsplug/inline.py", line 101, in _dict_for
    out = dict(obj)
          ^^^^^^^^^
  File "/home/keltoj/.pyenv/versions/3.11.1/lib/python3.11/site-packages/beets/library.py", line 702, in __getitem__
    return super().__getitem__(key)
           ^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/keltoj/.pyenv/versions/3.11.1/lib/python3.11/site-packages/beets/dbcore/db.py", line 452, in __getitem__
    return self._get(key, raise_=True)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/keltoj/.pyenv/versions/3.11.1/lib/python3.11/site-packages/beets/dbcore/db.py", line 433, in _get
    return getters[key](self)
           ^^^^^^^^^^^^^^^^^^
  File "/home/keltoj/.pyenv/versions/3.11.1/lib/python3.11/site-packages/beetsplug/inline.py", line 109, in _expr_func
    values = _dict_for(obj)
             ^^^^^^^^^^^^^^
  File "/home/keltoj/.pyenv/versions/3.11.1/lib/python3.11/site-packages/beetsplug/inline.py", line 101, in _dict_for

#
# etc over and over
#

    out = dict(obj)
          ^^^^^^^^^
  File "/home/keltoj/.pyenv/versions/3.11.1/lib/python3.11/site-packages/beets/library.py", line 702, in __getitem__
    return super().__getitem__(key)
           ^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/keltoj/.pyenv/versions/3.11.1/lib/python3.11/site-packages/beets/dbcore/db.py", line 452, in __getitem__
    return self._get(key, raise_=True)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/keltoj/.pyenv/versions/3.11.1/lib/python3.11/site-packages/beets/dbcore/db.py", line 433, in _get
    return getters[key](self)
           ^^^^^^^^^^^^^^^^^^
  File "/home/keltoj/.pyenv/versions/3.11.1/lib/python3.11/site-packages/beetsplug/inline.py", line 109, in _expr_func
    values = _dict_for(obj)
             ^^^^^^^^^^^^^^
  File "/home/keltoj/.pyenv/versions/3.11.1/lib/python3.11/site-packages/beetsplug/inline.py", line 101, in _dict_for
    out = dict(obj)
          ^^^^^^^^^
  File "/home/keltoj/.pyenv/versions/3.11.1/lib/python3.11/site-packages/beets/library.py", line 726, in keys
    if with_album and self._cached_album:
                      ^^^^^^^^^^^^^^^^^^
  File "/home/keltoj/.pyenv/versions/3.11.1/lib/python3.11/site-packages/beets/library.py", line 656, in _cached_album
    self.__album.load()
  File "/home/keltoj/.pyenv/versions/3.11.1/lib/python3.11/site-packages/beets/dbcore/db.py", line 613, in load
    db = self._check_db()
         ^^^^^^^^^^^^^^^^
  File "/home/keltoj/.pyenv/versions/3.11.1/lib/python3.11/site-packages/beets/dbcore/db.py", line 396, in _check_db
    if need_id and not self.id:
                       ^^^^^^^
  File "/home/keltoj/.pyenv/versions/3.11.1/lib/python3.11/site-packages/beets/dbcore/db.py", line 541, in __getattr__
    return self[key]
           ~~~~^^^^^
  File "/home/keltoj/.pyenv/versions/3.11.1/lib/python3.11/site-packages/beets/dbcore/db.py", line 452, in __getitem__
    return self._get(key, raise_=True)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^
RecursionError: maximum recursion depth exceeded

Here's a link to the music files that trigger the bug (if relevant):

Setup

• OS: Pop!_OS 22.04 LTS
• Python version: 3.11.1
• beets version: 2.0.0
• Turning off plugins made problem go away (yes/no): yes (disabling zero)

My configuration (output of beet config) is:

plugins: inline duplicates edit info zero
asciify_paths: yes
item_fields: 
  art: artist.replace(" ", "_")
  alb: album.replace(" ", "_")
  tit: title.replace(" ", "_")
  yr: year if year else "0000"
duplicates:
  move: ~/dupes/
  keys: [title, album]
edit:
  itemfields: acoustid_fingerprint acoustid_id added alb album album_id albumartist albumartist_credit albumartist_sort albumartists albumartists_credit albumartists_sort albumdisambig albumstatus albumtype albumtypes arranger art artist artist_credit artist_sort artists artists_credit artists_ids artists_sort asin barcode bitdepth bitrate bitrate_mode bpm catalognum channels comments comp composer composer_sort country day disc discogs_albumid discogs_artistid discogs_labelid disctitle disctotal encoder encoder_info encoder_settings filesize format genre grouping id initial_key isrc label language length lyricist lyrics mb_albumartistid mb_albumartistids mb_albumid mb_artistid mb_artistids mb_releasegroupid mb_releasetrackid mb_trackid mb_workid media month mtime original_day original_month original_year path r128_album_gain r128_track_gain release_group_title releasegroupdisambig remixer rg_album_gain rg_album_peak rg_track_gain rg_track_peak samplerate script singleton style tit title track trackdisambig tracktotal work work_disambig year yr
  albumfields: added album albumartist albumartist_credit albumartist_sort albumartists albumartists_credit albumartists_sort albumdisambig albumstatus albumtotal albumtype albumtypes artpath asin barcode catalognum comp country day discogs_albumid discogs_artistid discogs_labelid disctotal genre id label language mb_albumartistid mb_albumid mb_releasegroupid month original_day original_month original_year path r128_album_gain release_group_title releasegroupdisambig rg_album_gain rg_album_peak script style year
import:
  move: yes
  autotag: no
directory: ~/music/
paths: 
  default: %lower{$art/${yr}_$alb/${track}_$tit}
  singleton: %lower{$art/singles/$tit}
  comp: %lower{compilations/${yr}_$album/${track}_$tit}
zero:
  auto: yes
  fields: composer arranger isrc lyrics mb_trackid art comments original_year tracktotal images
  update_database: true