fix: handle logging calls when the logger is nil.

main.go

@@ -116,6 +116,11 @@ type CircularLogger struct {
 }
 
 func (l *CircularLogger) log(level LogLevel, message string, fields string) {
+	// check if l is nil. This can happen if the user has not initialized a logger.
+	if l == nil {
+		fmt.Println("Chainsaw: This logger isn't initialized. Use default logger or initialize a new one.")
+		return
+	}
 	t := time.Now()
 	msgFields := l.fields
 	if len(fields) > 0 {

main_test.go

@@ -40,6 +40,16 @@ func TestDemo(t *testing.T) {
 	logger.Stop()
 }
 
+func TestNilLogger(t *testing.T) {
+	var logger *CircularLogger
+	logger.Trace("This should not panic")
+	logger.Debugf("This should not panic either: %d", 1)
+	logger.Infow("This should not panic either", P{"test", 1})
+	logger.Warn("This should not panic either")
+	logger.Errorf("This should not panic either: %d", 1)
+	logger.Errorw("This should not panic either", P{"test", 1})
+}
+
 func TestLoggingPerformance(t *testing.T) {
 	is := is2.New(t)