Join errors feature is not avaliable at go 1.19

error.go

@@ -1,30 +1,9 @@
 package stty
 
-import(
+import (
-    "fmt"
+	"fmt"
 )
 
-type unwraperr interface {
-    Unwrap() error
-}
-
-type unwraperrs interface {
-    Unwrap() []error
-}
-
-func isUnwrapable(err error) bool {
-    _, ok1 := err.(unwraperr)
-    _, ok2 := err.(unwraperrs)
-    return ok1 || ok2
-}
-
-func enshureUnwrapable(err error) error {
-	if isUnwrapable(err) {
-		return fmt.Errorf(err.Error())
-	}
-	return err
-}
-
 func filterNilErrors(errs []error) (notNilErrs []error) {
 	for _, err := range errs {
 		if err != nil {
@@ -41,16 +20,12 @@ 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 {
-			result = fmt.Errorf("%w: %w", result, fmt.Errorf("foo"))
+			result = fmt.Errorf("%w: %v", result, err)
-			fmt.Println("1: ",result)
-			fmt.Println("2: ",err)
 		}
+		
 	}
     return result
 }