From 745b58b3d0c922fef1634b0d16de551fc6a0ec53 Mon Sep 17 00:00:00 2001
From: Haiyan Meng <haiyanmeng@google.com>
Date: Mon, 6 Jan 2020 11:55:22 -0800
Subject: [PATCH] Check whether a pointer is empty before accessing it to avoid
 SIGSEGV

---
 api/internal/crawl/index/elasticsearch.go | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/api/internal/crawl/index/elasticsearch.go b/api/internal/crawl/index/elasticsearch.go
index b80d7f901..3226b4970 100644
--- a/api/internal/crawl/index/elasticsearch.go
+++ b/api/internal/crawl/index/elasticsearch.go
@@ -309,9 +309,9 @@ func (idx *index) Exists(id string) (bool, error) {
 		op.WithPretty(),
 	)
 
-	if !res.IsError() {
+	if res != nil && !res.IsError() {
 		return true, nil
-	} else if res.StatusCode == 404 {
+	} else if res != nil && res.StatusCode == 404 {
 		return false, nil
 	} else {
 		return false, idx.responseErrorOrNil(