Reproduce with:

buku --db foo.db -a https://www.bing.com
buku --db foo.db -l
buku --db foo.db --sany bing

Actual result: the bing URL.

Expected result: Error, unlock DB first.

Also, locking --db foo.db actually locks the default DB, so after the above example:

buku --sany term

does result in an "[ERROR] Unlock database first" error. I'd expect it not to.

buku --version: 4.9