Database not closed when statements are cached about rusqlite HOT 2 CLOSED

Indeed,
The cache must be flushed before closing the connection !
I will try to fix and send a PR this week-end.

from rusqlite.

Another solution (not tested yet) will be the replacement of sqlite3_close by [sqlite3_close_v2](http://sqlite.org/c3ref/close.html):

If sqlite3_close_v2() is called on a database connection that still has outstanding prepared statements, BLOB handles, and/or sqlite3_backup objects then it returns SQLITE_OK and the deallocation of resources is deferred until all prepared statements, BLOB handles, and sqlite3_backup objects are also destroyed.

When the Rust connection is dropped, the cache is dropped as well as the cached prepared statements...

from rusqlite.