Check for valid response object before resuming data feed.

Author: smithsz

CHANGES.md

@@ -1,5 +1,6 @@
 # UNRELEASED
 - [NEW] Added option for client to authenticate with IAM token server.
+- [FIXED] Case where `.resume()` was called on an undefined response.
 
 # 3.0.2 (2019-01-07)
 - [FIXED] Remove unnecessary `@types/nano` dependancy.

lib/clientutils.js

@@ -108,14 +108,16 @@ var processState = function(r, callback) {
     return;
   }
 
-  // pass response events/data to awaiting client
-  if (r.eventRelay) {
-    r.eventRelay.resume();
-  }
-  if (r.clientStream.destinations.length > 0) {
-    r.response.pipe(r.clientStream.passThroughReadable);
+  if (r.response) {
+    // pass response events/data to awaiting client
+    if (r.eventRelay) {
+      r.eventRelay.resume();
+    }
+    if (r.clientStream.destinations.length > 0) {
+      r.response.pipe(r.clientStream.passThroughReadable);
+    }
+    r.response.resume();
   }
-  r.response.resume();
 
   // [5] => Return response to awaiting client.
   callback(new Error('No retry requested')); // no retry