Go module is usable even after deleting the module repo from GitHub-CodePudding

I was learning go modules so I created a very basic module with an Add() function and published it on GitHub.

The repository was https://github.com/umermasood/nummanip (it throws 404) becaused I deleted the repo from GitHub.

But I am still able to use the calc package from the module.

package main

import (
    "fmt"

    "github.com/umermasood/nummanip/calc"
)

func main() {
    fmt.Println(calc.Add(1, 2))
}

Output:

Above code in the Go Playground: https://go.dev/play/p/gMYD6Jirz_n

What is causing this behavior?

CodePudding user response：

The Go Module Mirror is keeping your module downloadable.

See the FAQ item below.

I removed a bad release from my repository but it still appears in the mirror, what should I do?

Whenever possible, the mirror aims to cache content in order to avoid breaking builds for people that depend on your package, so this bad release may still be available in the mirror even if it is not available at the origin. The same situation applies if you delete your entire repository. We suggest creating a new version and encouraging people to use that one instead.

Source: https://proxy.golang.org/