diff --git a/error.go b/error.go
index 6519b6e..3868788 100644
--- a/error.go
+++ b/error.go
@@ -43,7 +43,9 @@ func Join(errs ...error) (result error) {
 	}
 	
 	for index, err := range errs {
+		fmt.Println(isUnwrapable(err), err.Error())
 		err = enshureUnwrapable(err)
+		fmt.Println(isUnwrapable(err), err.Error())
 		if index == 0 {
 			result = err
 		} else {