Device spontanously loses sync storage

[turt2live]

Steps to reproduce

1. Use the app
2. Get told your messages are unable to decrypt suddenly (appears related)
3. Restart the client
4. Initial sync happens

Outcome

What did you expect?

For the app to restore safely and successfully

What happened instead?

My sync storage was wiped, causing an initial sync and empirically other issues with encryption

Operating system

Windows 11

Application version

Nightly (2022-11-04)

How did you install the app?

The Internet

Homeserver

t2l.io

Will you send logs?

Yes

[richvdh]

Possibly related to #14174

[richvdh]

From the rageshake:

2022-11-06T21:22:49.828Z E IndexedDBStore failure, degrading to MemoryStore Failed to execute 'transaction' on 'IDBDatabase': The database connection is closing.
InvalidStateError: Failed to execute 'transaction' on 'IDBDatabase': The database connection is closing.
    at Worker.<anonymous> (vector://vector/webapp/bundles/a0d2dee82d8a1dde44f2/init.js:86316:25)
2022-11-06T21:22:49.828Z I IndexedDBStore trying to delete degraded data
2022-11-06T21:22:49.873Z I IndexedDBStore delete after degrading succeeded

Presumably the reason that it loses all its storage is that it attempts to delete the store whenever there was an error. This appears to be an expected consequence of matrix-org/matrix-js-sdk#884.

I'm going to go ahead and close this as I think #14174 tracks the initial IndexedDB failure, and the loss of sync storage seems to be an expected consequence of that failure.