GC encounters unexpected error

[WestXu]

Bug Report

Output of dvc version:

$ dvc version
DVC version: 0.94.0
Python version: 3.8.1
Platform: Linux-4.19.104-microsoft-standard-x86_64-with-glibc2.10
Binary: False
Package: pip
Supported remotes: hdfs, http, https
Cache: reflink - not supported, hardlink - supported, symlink - supported
Filesystem type (cache directory): ('9p', 'D:\\')
Repo: dvc, git
Filesystem type (workspace): ('9p', 'D:\\')

dvc configs never changed, just defaults.

BTW, not sure if related, I'm in win10 + WSL 2 setup, where other dvc commands work just fine.

Additional Information:

$ dvc gc --all-commits --verbose
2020-07-01 14:35:59,016 DEBUG: '/mnt/d/git-project/intraday_model/.dvc/updater' is outdated(
2020-07-01 14:35:59,046 DEBUG: Trying to spawn '['/home/lxuwsl/miniconda3/bin/python', '/home/lxuwsl/miniconda3/bin/dvc', 'daemon', '-q', 'updater']'
2020-07-01 14:35:59,048 DEBUG: Spawned '['/home/lxuwsl/miniconda3/bin/python', '/home/lxuwsl/miniconda3/bin/dvc', 'daemon', '-q', 'updater']'
2020-07-01 14:35:59,049 WARNING: This will remove all cache except items used in the working tree and all git commits of the current repo.
Are you sure you want to proceed? [y/n] y
2020-07-01 14:36:17,890 DEBUG: PRAGMA user_version;
2020-07-01 14:36:17,891 DEBUG: fetched: [(3,)]
2020-07-01 14:36:17,891 DEBUG: CREATE TABLE IF NOT EXISTS state (inode INTEGER PRIMARY KEY, mtime TEXT NOT NULL, size TEXT NOT NULL, md5 TEXT NOT NULL, timestamp TEXT NOT NULL)
2020-07-01 14:36:17,892 DEBUG: CREATE TABLE IF NOT EXISTS state_info (count INTEGER)
2020-07-01 14:36:17,893 DEBUG: CREATE TABLE IF NOT EXISTS link_state (path TEXT PRIMARY KEY, inode INTEGER NOT NULL, mtime TEXT NOT NULL)
2020-07-01 14:36:17,894 DEBUG: INSERT OR IGNORE INTO state_info (count) SELECT 0 WHERE NOT EXISTS (SELECT * FROM state_info)
2020-07-01 14:36:17,895 DEBUG: PRAGMA user_version = 3;
2020-07-01 14:37:21,689 DEBUG: SELECT count from state_info WHERE rowid=?
2020-07-01 14:37:21,690 DEBUG: fetched: [(2929,)]
2020-07-01 14:37:21,690 DEBUG: UPDATE state_info SET count = ? WHERE rowid = ?
2020-07-01 14:37:21,742 ERROR: unexpected error
------------------------------------------------------------
Traceback (most recent call last):
  File "/home/lxuwsl/miniconda3/lib/python3.8/site-packages/dvc/main.py", line 49, in main
    ret = cmd.run()
  File "/home/lxuwsl/miniconda3/lib/python3.8/site-packages/dvc/command/gc.py", line 50, in run
    self.repo.gc(
  File "/home/lxuwsl/miniconda3/lib/python3.8/site-packages/dvc/repo/__init__.py", line 30, in wrapper
    ret = f(repo, *args, **kwargs)
  File "/home/lxuwsl/miniconda3/lib/python3.8/site-packages/dvc/repo/gc.py", line 66, in gc
    repo.used_cache(
  File "/home/lxuwsl/miniconda3/lib/python3.8/site-packages/dvc/repo/__init__.py", line 291, in used_cache
    used_cache = stage.get_used_cache(
  File "/home/lxuwsl/miniconda3/lib/python3.8/site-packages/dvc/stage/__init__.py", line 761, in get_used_cache
    cache.update(out.get_used_cache(*args, **kwargs))
  File "/home/lxuwsl/miniconda3/lib/python3.8/site-packages/dvc/output/base.py", line 432, in get_used_cache
    if self.exists:
  File "/home/lxuwsl/miniconda3/lib/python3.8/site-packages/dvc/output/base.py", line 168, in exists
    return self.remote.exists(self.path_info)
  File "/home/lxuwsl/miniconda3/lib/python3.8/site-packages/dvc/remote/local.py", line 97, in exists
    assert is_working_tree(self.repo.tree)
AssertionError
------------------------------------------------------------

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[skshetry]

Hi @WestXu. This has been fixed in >=1.0. Please upgrade using pip install --upgrade dvc.

Duplicate of #4062

Related: #3857 #3812