From 068c2d4938bafe4c7fa12cf9aff4fb6b5e1f1e0e Mon Sep 17 00:00:00 2001
From: Rhys Arkins <rhys@arkins.net>
Date: Fri, 19 Oct 2018 07:15:55 +0200
Subject: [PATCH] fix(github): check for parent edges

---
 lib/platform/github/index.js | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lib/platform/github/index.js b/lib/platform/github/index.js
index 6aca9bd4e3..6281afa50b 100644
--- a/lib/platform/github/index.js
+++ b/lib/platform/github/index.js
@@ -1063,8 +1063,9 @@ async function getOpenPrs() {
         } else {
           const baseCommitSHA = await getBaseCommitSHA();
           if (
+            pr.commits.nodes[0].commit.parents.edges.length &&
             pr.commits.nodes[0].commit.parents.edges[0].node.oid !==
-            baseCommitSHA
+              baseCommitSHA
           ) {
             pr.isStale = true;
           }
-- 
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