dictionary - How to recover from concurrent map writes?

Question

How do you recover from a runtime panic on a "concurrent map read and map write"? The usual defer with recover doesn't seem to work. Why is that?

I know that you are not supposed to use maps in concurrent contexts, but still: how to recover here?

Example:

package main

import "time"

var m = make(map[string]string)

func main() {
    go func() {
        for {
            m["x"] = "foo"
        }
    }()
    go func() {
        for {
            m["x"] = "foo"
        }
    }()

    time.Sleep(1 * time.Second)
}

Please add recovery code. :)

Answer 1

Waitting for answers