From bf6ce1aff0618e0c12922759664e46fa009b8792 Mon Sep 17 00:00:00 2001
From: ivy1996-encode <15055461510@163.com>
Date: Sun, 14 Mar 2021 09:32:32 +0800
Subject: [PATCH] fix a problem with Bot.Block

---
 bot.go | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/bot.go b/bot.go
index 90be98e..7f96399 100644
--- a/bot.go
+++ b/bot.go
@@ -193,7 +193,10 @@ func (b *Bot) Block() error {
 	if b.self == nil {
 		return errors.New("`Block` must be called after user login")
 	}
-	<-b.exit
+	if _, closed := <-b.exit; closed {
+		return errors.New("can not call `Block` after user logout")
+	}
+	close(b.exit)
 	return nil
 }