That points to https://searchfox.org/mozilla-central/rev/3aaca0a12a2d1463da54933bdbdae2f06fead06f/storage/mozStorageConnection.cpp#1596, that means creating PRAGMA database_list statement failed. The code has decent protection around the failure, the assertion exist as an heads up. If it fails, it means cloning the connection fails. I'm not sure which point of CreateStatement failed, the pernosco session expired and it's currently rebuilding it.
Bug 1786664 Comment 2 Edit History
Note: The actual edited comment in the bug view page will always show the original commenter’s name and original timestamp.
That points to https://searchfox.org/mozilla-central/rev/3aaca0a12a2d1463da54933bdbdae2f06fead06f/storage/mozStorageConnection.cpp#1596, that means creating PRAGMA database_list statement failed. The code has decent protection around the failure, the assertion exists as an heads up. If it fails, it means cloning the connection fails. I'm not sure which point of CreateStatement failed, the pernosco session expired and it's currently rebuilding it.