When I attempted to connect to `http://duskgytldkxiuqc$.onion/` (using `usewithtor w3m`; I don't know whether Firefox would try to connect to that hostname) using my [feature2553-v2](https://gitweb.torproject.org/rransom/tor.git/shortlog/refs/heads/feature2553-v2) branch ( `git://git.torproject.org/rransom/tor.git feature2553-v2` ) (compiled with `--enable-bufferevents`), Tor produced the following warning message: ``` Jun 15 02:41:53.000 [warn] Invalid onion hostname [scrubbed]; rejecting Jun 15 02:41:53.000 [warn] Bug: Duplicate call to connection_mark_for_close at connection.c:2956 (first at connection_edge.c:1702) ``` `connection.c:2956` is in `connection_handle_read_cb`; `connection_edge.c:1702` is in `connection_ap_handshake_rewrite_and_attach`.