Merge pull request #274 from matrix-org/rav/log_on_unknown_session

Log to the console on unknown session

lib/crypto/index.js

@@ -958,6 +958,10 @@ Crypto.prototype.decryptEvent = function(event) {
                 // back to all devices.
                 device_id = null;
             }
+            console.log(
+                "Unknown session decrypting event id " + event.event_id +
+                    ": sending m.new_device event"
+            );
             this._sendPingToDevice(event.sender, device_id, event.room_id);
         }