Error when closing any 7z archive

[krateng]

This happens with almost every 7z archive that contains anything.

With archive.7z being an archive in the current directory:

myfs = fs.archive.open_archive(".","archive.7z")
myfs.close()

results in

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/krateng/.local/lib/python3.10/site-packages/fs/archive/base.py", line 278, in close
    self._saver.save(self)
  File "/home/krateng/.local/lib/python3.10/site-packages/fs/archive/base.py", line 58, in save
    self.to_stream(fs)
  File "/home/krateng/.local/lib/python3.10/site-packages/fs/archive/base.py", line 86, in to_stream
    self._to(temp, fs)
  File "/home/krateng/.local/lib/python3.10/site-packages/fs/archive/sevenzipfs/__init__.py", line 293, in _to
    _7z.worker.archive(_7z.fp, _7z.files, folder, deref=_7z.dereference)
  File "/home/krateng/.local/lib/python3.10/site-packages/py7zr/py7zr.py", line 1494, in archive
    foutsize, crc = self.write(fp, f, (f.is_symlink and not deref), folder)
  File "/home/krateng/.local/lib/python3.10/site-packages/py7zr/py7zr.py", line 1460, in write
    with f.origin.open(mode="rb") as fd:
  File "/home/krateng/.local/lib/python3.10/site-packages/fs/archive/sevenzipfs/__init__.py", line 37, in open
    return self.fs.openbin(self.path, mode)
  File "/home/krateng/.local/lib/python3.10/site-packages/fs/wrapfs.py", line 194, in openbin
    bin_file = _fs.openbin(_path, mode=mode, buffering=-1, **options)
  File "/home/krateng/.local/lib/python3.10/site-packages/fs/archive/wrap.py", line 149, in openbin
    return self._rfs.openbin(path, mode, buffering, **options)
  File "/home/krateng/.local/lib/python3.10/site-packages/fs/archive/sevenzipfs/__init__.py", line 194, in openbin
    return iocursor.Cursor(decompressed[relpath(_path)].getbuffer())
KeyError: 'randomfileinthearchive.ext'

It also happens when I provide a pre-initialized Filesystem object as the parent of the archive fs and when I use context manager instead of manually closing.

If I create a new archive with only one empty file in it, it works. If that file contains anything, it doesn't work anymore.

The same error happens when trying to read a file.

[krateng]

After some initial experimenting, I think this

fs.archive/fs/archive/sevenzipfs/__init__.py

Lines 183 to 194 in 7461b6c

	try:
	_7z = py7zr.SevenZipFile(self._handle, 'r', password=self._password)
	decompressed = _7z.read([_path])
	except py7zr.exceptions.PasswordRequired as exc:
	raise errors.PermissionDenied(msg="7z archive is password protected", exc=exc)
	except lzma.LZMAError as exc:
	raise errors.OperationFailed(exc=exc)
	finally:
	if _7z is not None:
	_7z.close()
	return iocursor.Cursor(decompressed[relpath(_path)].getbuffer())

needs to pass the relpath to _7z.read. This fixes my issues with reading files, but I haven't looked too much into the overall architecture of the whole package, so I don't know if this clashes with something else.

This now also leads to the archive not closing anymore (even nothing has been written to it) - it seems to be stuck endlessly repeating the function

File "/home/krateng/.local/lib/python3.10/site-packages/fs/archive/base.py", line 278, in close
    self._saver.save(self)
  File "/home/krateng/.local/lib/python3.10/site-packages/fs/archive/base.py", line 58, in save
    self.to_stream(fs)
  File "/home/krateng/.local/lib/python3.10/site-packages/fs/archive/base.py", line 86, in to_stream
    self._to(temp, fs)
  File "/home/krateng/.local/lib/python3.10/site-packages/fs/archive/sevenzipfs/__init__.py", line 294, in _to
    _7z.worker.archive(_7z.fp, _7z.files, folder, deref=_7z.dereference)
  File "/home/krateng/.local/lib/python3.10/site-packages/py7zr/py7zr.py", line 1494, in archive
    foutsize, crc = self.write(fp, f, (f.is_symlink and not deref), folder)
  File "/home/krateng/.local/lib/python3.10/site-packages/py7zr/py7zr.py", line 1461, in write
    insize, foutsize, crc = compressor.compress(fd, fp)
  File "/home/krateng/.local/lib/python3.10/site-packages/py7zr/compressor.py", line 884, in compress
    data = compressor.compress(data)