Hi everyone, I have been writing quite a few Python scripts for notmuch before running into a strange bug. Here is a minimal script producing it: -------------------------------------------------- from notmuch import Query, Database def foo(bar): pass db = Database() q = Query(db, "*") db.close() -------------------------------------------------- Running this script (Python 3.5, MacOS X) yields: [1] 22478 abort pydev3 Temp/notmuch_test.py The crash actually happens *after* db.close(), when the Python interpreter exists, and therefore I suspect that no data is lost, but I hesitate to use scripts with that behavior in production use. The strange part is that what causes the crash is the presence of the function foo(), even though it is never called. Remove foo and the script runs fine. It is also necessary to create a Query object. The combination of a function definition (any) and the creation of a Query object yields the crash. This looks like a memory management issue, but I didn't explore it any further. Cheers, Konrad.