From 269ff8e6030cacd3a8ef5804f39c50566ce6f57e Mon Sep 17 00:00:00 2001
From: Brad Fitzpatrick <bradfitz@golang.org>
Date: Mon, 5 Sep 2016 20:16:16 +0000
Subject: [PATCH] io: make MultiReader nil exhausted Readers for earlier GC

No test because the language spec makes no promises in this area.

Fixes #16983

Change-Id: I1a6aa7ff87dd14aa27e8400040a6f6fc908aa1fd
Reviewed-on: https://go-review.googlesource.com/28533
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Joe Tsai <thebrokentoaster@gmail.com>
---
 src/io/multi.go | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/io/multi.go b/src/io/multi.go
index 3a9d03652b..46e45a60e8 100644
--- a/src/io/multi.go
+++ b/src/io/multi.go
@@ -19,6 +19,7 @@ func (mr *multiReader) Read(p []byte) (n int, err error) {
 		}
 		n, err = mr.readers[0].Read(p)
 		if err == EOF {
+			mr.readers[0] = nil // permit earlier GC
 			mr.readers = mr.readers[1:]
 		}
 		if n > 0 || err != EOF {
-- 
2.48.1