Another (simpler) example using a task list to handle errors

example.go

package main

import (
	"errors"
	"fmt"
)

// Task represents a callable task to be executed
type Task func() error

// Work slice of consecutive tasks that each may or may not have a single point of failure
type Work []Task

// Add a Task to the work queue 
func (w *Work) Add(ts ...Task) {
	*w = append(*w, ts...)
}

// Do the work
func (w Work) Do() (err error) {
	for _, t := range w {
		err = t()
		if err != nil {
			return
		}
	}
	return
}

func main() {
	work := Work{}
	
	// task A
	work.Add(func() (err error) {
		fmt.Println("A")
		return
	})
	
	// task B
	work.Add(func() (err error) {
		fmt.Println("B")
		return
	})
	
	// task C
	work.Add(func() (err error) {
		fmt.Println("C")
		err = errors.New("I don't know why, but Fail!")
		return
	})
	
	// task D
	work.Add(func() (err error) {
		fmt.Println("D")
		return
	})

	err := work.Do()
	if err != nil {
		fmt.Println(err.Error())
	}
}

// Add link play.golang.org here