From: Brad Fitzpatrick <bradfitz@golang.org>
Date: Mon, 5 Sep 2016 20:16:16 +0000 (+0000)
Subject: io: make MultiReader nil exhausted Readers for earlier GC
X-Git-Tag: go1.8beta1~1490
X-Git-Url: http://www.git.cypherpunks.su/?a=commitdiff_plain;h=269ff8e6030cacd3a8ef5804f39c50566ce6f57e;p=gostls13.git

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>
---

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 {