fix: add check for base before comparing sha (#997)

48f2b5a2 · Rhys Arkins · singapore · f69af75c · 48f2b5a2
Commit 48f2b5a2 authored Oct 19, 2017 by Rhys Arkins Committed by singapore Oct 19, 2017
--- a/lib/api/github.js
+++ b/lib/api/github.js
@@ -635,7 +635,7 @@ async function getPr(prNo) {
        pr.canRebase = true;
      }
    }
-    if (pr.base.sha !== config.baseCommitSHA) {
+    if (!pr.base || pr.base.sha !== config.baseCommitSHA) {
      pr.isStale = true;
    }
  }