cause

package main

import (
	"errors"
	"fmt"

	"github.com/searKing/golang/go/error/cause"
)

func main() {
	cause_ := errors.New("whoops")
	err := fmt.Errorf("oh noes")
	err = cause.WithError(cause_, err)
	fmt.Println(err)

}

Output:

oh noes: whoops