From c6096af885c78e9f46a882a7121d2bb4df556172 Mon Sep 17 00:00:00 2001
From: Jeremy Stribling <strib@alum.mit.edu>
Date: Thu, 20 Dec 2018 10:07:00 -0800
Subject: [PATCH] prefetcher: fix memory leak by not keeping filled-in block in
 req

Issue: #1958
---
 libkbfs/prefetcher.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libkbfs/prefetcher.go b/libkbfs/prefetcher.go
index 0d03f3cfae..2f138770de 100644
--- a/libkbfs/prefetcher.go
+++ b/libkbfs/prefetcher.go
@@ -375,7 +375,7 @@ func (p *blockPrefetcher) request(ctx context.Context, priority int,
 		// handled.
 		pre.req.action = newAction
 		ch := p.retriever.Request(
-			pre.ctx, priority, kmd, ptr, block, lifetime, action)
+			pre.ctx, priority, kmd, ptr, block.NewEmpty(), lifetime, action)
 		p.inFlightFetches.In() <- ch
 	}
 	_, isParentWaiting := p.prefetches[parentPtr.ID]