sqlite error "attempt to write a readonly database" when databse is not readonly

[yjmsyzne]

I run Mnemosyne inside a syncthing container. Initially the setup was working fine, but after a few weeks of use I am getting errors often when I try to save or load the database.

```
Traceback (innermost last):
  File "/usr/local/bin/mnemosyne", line 4, in <module>
    __import__('pkg_resources').run_script('Mnemosyne==2.5', 'mnemosyne')
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 742, in run_script
    self.require(requires)[0].run_script(script_name, ns)
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 1503, in run_script
    exec(code, namespace, namespace)
  File "/usr/local/lib/python3.5/dist-packages/Mnemosyne-2.5-py3.5.egg/EGG-INFO/scripts/mnemosyne", line 273, in <module>
    mnemosyne.finalise()
  File "/usr/local/lib/python3.5/dist-packages/Mnemosyne-2.5-py3.5.egg/mnemosyne/libmnemosyne/__init__.py", line 385, in finalise
    self.log().saved_database()
  File "/usr/local/lib/python3.5/dist-packages/Mnemosyne-2.5-py3.5.egg/mnemosyne/libmnemosyne/loggers/database_logger.py", line 56, in saved_database
    scheduled_count, non_memorised_count, active_count)
  File "/usr/local/lib/python3.5/dist-packages/Mnemosyne-2.5-py3.5.egg/mnemosyne/libmnemosyne/databases/SQLite_logging.py", line 58, in log_saved_database
    scheduled_count, non_memorised_count, active_count))
  File "/usr/local/lib/python3.5/dist-packages/Mnemosyne-2.5-py3.5.egg/mnemosyne/libmnemosyne/databases/_sqlite3.py", line 72, in execute
    self._cursor = self.connection.execute(sql, *args)
 sqlite3.OperationalError: attempt to write a readonly database
```

The database is not readonly, and when I try the operation again it normally works fine.

Is this just an inherent problem with running Mnemosyne inside syncthing or is it something that could be worked around or fixed?

[Peter Bienstman (peter-bienstman)]

I've not seen this before, so unless you can reproduce it outside of syncthing, I'm afraid there not much I can do about it...