From 612d3b07b0494dbf3221b3fbf336a711a9b3a61f Mon Sep 17 00:00:00 2001
From: Hajime Hoshi <hajimehoshi@gmail.com>
Date: Wed, 17 Aug 2016 01:57:20 +0900
Subject: [PATCH] ui: Bug fix: ui.funcs might be closed before sending a value

---
 internal/ui/ui_glfw.go | 10 +++-------
 1 file changed, 3 insertions(+), 7 deletions(-)

diff --git a/internal/ui/ui_glfw.go b/internal/ui/ui_glfw.go
index aca893d0d..f37b9d1e5 100644
--- a/internal/ui/ui_glfw.go
+++ b/internal/ui/ui_glfw.go
@@ -84,13 +84,10 @@ func (u *userInterface) main(ch <-chan error) error {
 	// TODO: Check this is done on the main thread.
 	for {
 		select {
-		case f, ok := <-u.funcs:
-			if ok {
-				f()
-			} else {
-				u.funcs = nil
-			}
+		case f := <-u.funcs:
+			f()
 		case err := <-ch:
+			// ch returns a value not only when an error occur but also it is closed.
 			return err
 		}
 	}
@@ -251,7 +248,6 @@ func (u *userInterface) Terminate() error {
 		glfw.Terminate()
 		return nil
 	})
-	close(u.funcs)
 	return nil
 }