This commit fixes data race using atomics. We switch type of level from uint8 to uint32 but due memory alignment on most platforms it will not result in any additional memory.

exported.go

@@ -31,14 +31,14 @@ func SetFormatter(formatter Formatter) {
 func SetLevel(level Level) {
 	std.mu.Lock()
 	defer std.mu.Unlock()
-	std.Level = level
+	std.setLevel(level)
 }
 
 // GetLevel returns the standard logger level.
 func GetLevel() Level {
 	std.mu.Lock()
 	defer std.mu.Unlock()
-	return std.Level
+	return std.level()
 }
 
 // AddHook adds a hook to the standard logger hooks.