From d8054c30c52489d82823e762a9999878e466c41e Mon Sep 17 00:00:00 2001
From: wanghengbing <wanghengbing@momenta.ai>
Date: Wed, 4 Aug 2021 20:53:50 +0800
Subject: [PATCH] delete un-needed mutable keyword

---
 include/spdlog/details/backtracer.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/spdlog/details/backtracer.h b/include/spdlog/details/backtracer.h
index b7476bc9..f5892c0a 100644
--- a/include/spdlog/details/backtracer.h
+++ b/include/spdlog/details/backtracer.h
@@ -17,7 +17,7 @@ namespace spdlog {
 namespace details {
 class SPDLOG_API backtracer
 {
-    mutable std::mutex mutex_;
+    std::mutex mutex_;
     std::atomic<bool> enabled_{false};
     circular_q<log_msg_buffer> messages_;