From de75f4296cd051edfe27940044d7518a4453f7df Mon Sep 17 00:00:00 2001
From: etying <wjy@palliums.org>
Date: Tue, 28 Aug 2018 19:43:22 -0700
Subject: [PATCH] fix issue #17534

---
 eth/fetcher/fetcher.go | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/eth/fetcher/fetcher.go b/eth/fetcher/fetcher.go
index 277f14b81a..58ff43d83c 100644
--- a/eth/fetcher/fetcher.go
+++ b/eth/fetcher/fetcher.go
@@ -385,7 +385,7 @@ func (f *Fetcher) loop() {
 
 				// Create a closure of the fetch and schedule in on a new thread
 				fetchHeader, hashes := f.fetching[hashes[0]].fetchHeader, hashes
-				go func() {
+				go func(fetchHeader headerRequesterFn, hashes []common.Hash) {
 					if f.fetchingHook != nil {
 						f.fetchingHook(hashes)
 					}
@@ -393,7 +393,7 @@ func (f *Fetcher) loop() {
 						headerFetchMeter.Mark(1)
 						fetchHeader(hash) // Suboptimal, but protocol doesn't allow batch header retrievals
 					}
-				}()
+				}(fetchHeader, hashes)
 			}
 			// Schedule the next fetch if blocks are still pending
 			f.rescheduleFetch(fetchTimer)