From b28aca1f82ad564e6c9959c8b088b496db2edf82 Mon Sep 17 00:00:00 2001
From: Tao He <sighingnow@gmail.com>
Date: Fri, 21 May 2021 17:45:18 +0800
Subject: [PATCH] Fixes a CAS error in watcher.

Signed-off-by: Tao He <sighingnow@gmail.com>
---
 src/Watcher.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Watcher.cpp b/src/Watcher.cpp
index bc2216c..50fd291 100644
--- a/src/Watcher.cpp
+++ b/src/Watcher.cpp
@@ -97,7 +97,7 @@ etcd::Watcher::~Watcher()
 
 bool etcd::Watcher::Wait()
 {
-  if (cancelled.exchange(true)) {
+  if (!cancelled.exchange(true)) {
     if (task_.joinable()) {
       task_.join();
     }