- Leanic Lefever reported a crash and did some detailed research on why and

how it occurs (http://curl.haxx.se/mail/lib-2009-04/0289.html). The
  conclusion was that if an error is detected and Curl_done() is called for
  the connection, ftp_done() could at times return another error code that
  then would take precedence and that new code confused existing logic that
  works for the first error code (CURLE_SEND_ERROR) only.

lib/ftp.c

@@ -3185,6 +3185,7 @@ static CURLcode ftp_done(struct connectdata *conn, CURLcode status,
     ftpc->cwdfail = TRUE; /* set this TRUE to prevent us to remember the
                              current path, as this connection is going */
     conn->bits.close = TRUE; /* marked for closure */
+    result = status;      /* use the already set error code */
     break;
   }