error_trace_example.go

package main

import (
	"fmt"

	"github.com/pkg/errors"
)

func bar() error {
	return errors.Wrap(fmt.Errorf("barError"), "bar")
}

func foo() error {
	return bar()
}

type stackTracer interface {
	StackTrace() errors.StackTrace
}

func main() {
	err := foo()
	if err, ok := err.(stackTracer); ok {
		for _, f := range err.StackTrace() {
			fmt.Printf("%+s:%d\n", f, f)
		}
	}
}

main.bar
	/tmp/goexample/main.go:10
main.foo
	/tmp/goexample/main.go:14
main.main
	/tmp/goexample/main.go:22
runtime.main
	/usr/local/go/src/runtime/proc.go:201
runtime.goexit
	/usr/local/go/src/runtime/asm_amd64.s:1333