Update .travis.yml

.travis.yml

@@ -5,7 +5,7 @@
 sudo: required
 language: cpp
 
-# gcc 4.8
+# gcc t
 addons: &gcc48
   apt:
     packages:
@@ -52,7 +52,7 @@ matrix:
     - env: GCC_VERSION=4.8 BUILD_TYPE=Release CPP=11
       os: linux
       addons: *gcc48
-
+    # Test gcc-7: C++11, Build=Debug/Release
     - env: GCC_VERSION=7 BUILD_TYPE=Release CPP=11
       os: linux
       addons: *gcc7
@@ -81,7 +81,7 @@ matrix:
       dist: bionic
       addons: *clang10
       
-    # Test clang-10.0: C++11, Build=Debug/Release
+    # Test clang-10.0: C++17, Build=Debug/Release
     - env: CLANG_VERSION=10 BUILD_TYPE=Release CPP=17 ASAN=Off
       os: linux
       dist: bionic

include/spdlog/sinks/dup_filter_sink.h

@@ -7,6 +7,7 @@
 #include <spdlog/details/null_mutex.h>
 #include <spdlog/details/log_msg.h>
 
+#include <iterator>
 #include <mutex>
 #include <string>
 #include <chrono>
@@ -63,7 +64,7 @@ protected:
         if (skip_counter_ > 0)
         {
             memory_buf_t buf;
-            fmt::format_to(std::back_inserter(buf), "Skipped {} duplicate messages..", skip_counter_);
+            fmt::format_to(buf, "Skipped {} duplicate messages..", skip_counter_);
             details::log_msg skipped_msg{msg.logger_name, level::info, string_view_t{buf.data(), buf.size()}};
             dist_sink<Mutex>::sink_it_(skipped_msg);
         }