Hi, I started writing some test cases to define better what you can do with a closed database and make sure that the python bindings do not behave unexpectedly here too. One of the first things I tried ends up with xapian calling exit_group(2) directly, terminating the process. So I'm wondering if I'm approaching this entirely the wrong way. My understanding is that we should generally be allowed to use anything after the database has been closed, as long as nothing has been destroyed. Below is a minimal reproducible example of what I'm testing so far. I must admit I'm generally lazy here and usually just test with notmuch that is currently in Debian testing. Cheers, Floris Here the script: #!/bin/sh MAILDIR=$(mktemp --directory) export MAILDIR echo $MAILDIR mkdir $MAILDIR/tmp mkdir $MAILDIR/new mkdir $MAILDIR/cur cat > $MAILDIR/notmuch-config <<EOF [database] path=$MAILDIR [user] name=Some Hacker primary_email=dst@example.com [new] tags=unread;inbox; ignore= [search] exclude_tags=deleted;spam; [maildir] synchronize_flags=true EOF NOTMUCH_CONFIG=$MAILDIR/notmuch-config export NOTMUCH_CONFIG cat > $MAILDIR/cur/1593342032.M818430P304029Q3.powell <<EOF Received: by MailDir; Sun Jun 28 13:00:32 2020 Message-ID: <0@powell.devork.be> Date: Sun, 28 Jun 2020 13:00:32 -0000 From: src@example.com To: dst@example.com Subject: Test mail Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit MIME-Version: 1.0 This is a test mail EOF notmuch new cat >$MAILDIR/test.c <<EOF #include <stdio.h> #include <notmuch.h> int main(int argc, char** argv) { notmuch_status_t status; notmuch_database_t* db; notmuch_message_t* msg; const char* messageid; printf("Opening db\n"); status = notmuch_database_open(argv[1], NOTMUCH_DATABASE_MODE_READ_ONLY, &db); if (status != NOTMUCH_STATUS_SUCCESS) { return status; } printf("Finding msg\n"); status = notmuch_database_find_message(db, "0@powell.devork.be", &msg); if (status != NOTMUCH_STATUS_SUCCESS) { return status; } printf("Closing db\n"); status = notmuch_database_close(db); if (status != NOTMUCH_STATUS_SUCCESS) { return status; } printf("Get messageid\n"); messageid = notmuch_message_get_message_id(msg); if (messageid == NULL) { return 1; } printf("Messageid: %s\n", messageid); printf("The end.\n"); } EOF gcc $MAILDIR/test.c -lnotmuch -o $MAILDIR/test $MAILDIR/test $MAILDIR _______________________________________________ notmuch mailing list notmuch@notmuchmail.org https://notmuchmail.org/mailman/listinfo/notmuch