Fix bug in timeout handling in keyclient

synapse/crypto/keyclient.py

@@ -61,9 +61,11 @@ class SynapseKeyClientProtocol(HTTPClient):
 
     def __init__(self):
         self.remote_key = defer.Deferred()
+        self.host = None
 
     def connectionMade(self):
-        logger.debug("Connected to %s", self.transport.getHost())
+        self.host = self.transport.getHost()
+        logger.debug("Connected to %s", self.host)
         self.sendCommand(b"GET", b"/_matrix/key/v1/")
         self.endHeaders()
         self.timer = reactor.callLater(
@@ -92,8 +94,7 @@ class SynapseKeyClientProtocol(HTTPClient):
         self.timer.cancel()
 
     def on_timeout(self):
-        logger.debug("Timeout waiting for response from %s",
-                     self.transport.getHost())
+        logger.debug("Timeout waiting for response from %s", self.host)
         self.remote_key.errback(IOError("Timeout waiting for response"))
         self.transport.abortConnection()