diff --git a/vendor/go.uber.org/zap/sugar.go b/vendor/go.uber.org/zap/sugar.go
index 77ca227..0b96519 100644
--- a/vendor/go.uber.org/zap/sugar.go
+++ b/vendor/go.uber.org/zap/sugar.go
@@ -222,19 +222,30 @@
 		return
 	}
 
-	// Format with Sprint, Sprintf, or neither.
-	msg := template
-	if msg == "" && len(fmtArgs) > 0 {
-		msg = fmt.Sprint(fmtArgs...)
-	} else if msg != "" && len(fmtArgs) > 0 {
-		msg = fmt.Sprintf(template, fmtArgs...)
-	}
-
+	msg := getMessage(template, fmtArgs)
 	if ce := s.base.Check(lvl, msg); ce != nil {
 		ce.Write(s.sweetenFields(context)...)
 	}
 }
 
+// getMessage format with Sprint, Sprintf, or neither.
+func getMessage(template string, fmtArgs []interface{}) string {
+	if len(fmtArgs) == 0 {
+		return template
+	}
+
+	if template != "" {
+		return fmt.Sprintf(template, fmtArgs...)
+	}
+
+	if len(fmtArgs) == 1 {
+		if str, ok := fmtArgs[0].(string); ok {
+			return str
+		}
+	}
+	return fmt.Sprint(fmtArgs...)
+}
+
 func (s *SugaredLogger) sweetenFields(args []interface{}) []Field {
 	if len(args) == 0 {
 		return nil
@@ -255,7 +266,7 @@
 
 		// Make sure this element isn't a dangling key.
 		if i == len(args)-1 {
-			s.base.DPanic(_oddNumberErrMsg, Any("ignored", args[i]))
+			s.base.Error(_oddNumberErrMsg, Any("ignored", args[i]))
 			break
 		}
 
@@ -276,7 +287,7 @@
 
 	// If we encountered any invalid key-value pairs, log an error.
 	if len(invalid) > 0 {
-		s.base.DPanic(_nonStringKeyErrMsg, Array("invalid", invalid))
+		s.base.Error(_nonStringKeyErrMsg, Array("invalid", invalid))
 	}
 	return fields
 }