fix(pool): check topology exists before verifying session support

NODE-1088
mongodb-js · Oct 2, 2017 · 0aa146d · 0aa146d
1 parent e700b79
commit 0aa146d
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/lib/connection/pool.js b/lib/connection/pool.js
@@ -32,6 +32,7 @@ var DESTROYED = 'destroyed';
 var _id = 0;
 
 function supportsClusterTime(topology) {
+  if (topology == null) return false;
   return topology.ismaster == null ? false : topology.ismaster.maxWireVersion >= 6;
 }