From 90595f321a7bb27bd752633985930132e367a18a Mon Sep 17 00:00:00 2001
From: tim <tim@fewagainstmany.com>
Date: Mon, 25 Nov 2019 20:22:00 -0800
Subject: [PATCH] bug(cloudflared): nil pointer deference on h2DictWriter
 Close()

Unlike other h2DictWriter methods, the Close() method does check whether
w.comp is nil.

This PR adds a check for non nil compressor before attempting to close

Bug: #141
---
 h2mux/h2_dictionaries.go | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/h2mux/h2_dictionaries.go b/h2mux/h2_dictionaries.go
index bd091894..bf92d58d 100644
--- a/h2mux/h2_dictionaries.go
+++ b/h2mux/h2_dictionaries.go
@@ -542,7 +542,10 @@ func (w *h2DictWriter) Write(p []byte) (n int, err error) {
 }
 
 func (w *h2DictWriter) Close() error {
-	return w.comp.Close()
+	if w.comp != nil {
+		return w.comp.Close()
+	}
+	return nil
 }
 
 // From http2/hpack