From 7c1f74713e273d1e4f1982466eb6fd96e55e8c4d Mon Sep 17 00:00:00 2001
From: Jeffrey Wilcke <geffobscura@gmail.com>
Date: Thu, 12 May 2016 17:57:45 +0200
Subject: event: fixed subscribtions to stopped event mux

This fixes an issue where the following would lead to a panic due to a
channel being closed twice:

* Start mux
* Stop mux
* Sub to mux
* Unsub

This is fixed by setting the subscriptions status to closed resulting in
the Unsubscribe to ignore the request when called.
---
 event/event_test.go | 8 ++++++++
 1 file changed, 8 insertions(+)

(limited to 'event/event_test.go')

diff --git a/event/event_test.go b/event/event_test.go
index 323cfea49..394029301 100644
--- a/event/event_test.go
+++ b/event/event_test.go
@@ -25,6 +25,14 @@ import (
 
 type testEvent int
 
+func TestSubCloseUnsub(t *testing.T) {
+	// the point of this test is **not** to panic
+	var mux TypeMux
+	mux.Stop()
+	sub := mux.Subscribe(int(0))
+	sub.Unsubscribe()
+}
+
 func TestSub(t *testing.T) {
 	mux := new(TypeMux)
 	defer mux.Stop()
-- 
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