package main

import (
	"fmt"
	"log"

	"github.com/pkg/errors"
)

// type ownError struct{}

// func (e *ownError) Error() string {
// 	return "is ownError"
// }

// func Exec() error {
// 	return new(ownError)
// }

func a() error {
	err := b()
	err = errors.New("aaa")
	log.Printf("original error:%T %v\n", errors.Cause(err), errors.Cause(err))
	return err
}

func b() error {
	err := errors.New("bbb")
	log.Printf("original error:%T %v\n", errors.Cause(err), errors.Cause(err))
	return errors.Wrap(err, "fun3 call func2 error")
}

// eas 测试连接
func main() {
	log.Printf("original error:%+v ", a())
	fmt.Println("aaaaaaaa")
}