+ /* If there's an outstanding transaction, it's unclear if
+ * closing the Xapian database commits everything up to
+ * that transaction, or may discard committed (but
+ * unflushed) transactions. To be certain, explicitly
+ * cancel any outstanding transaction before closing. */
+ if (notmuch->mode == NOTMUCH_DATABASE_MODE_READ_WRITE &&
+ notmuch->atomic_nesting)
+ (static_cast <Xapian::WritableDatabase *> (notmuch->xapian_db))
+ ->cancel_transaction ();
+
+ /* Close the database. This implicitly flushes
+ * outstanding changes. */