golang send a http request with a context deadline exceeded

req-failing-with-deadline-exceeded.go

package main

import (
	"context"
	"net/http"
)

func checkErr(err error) {
	if err != nil {
		panic(err)
	}
}

func main() {
	ctx, _ := context.WithTimeout(context.Background(), 0)
	r, err := http.NewRequestWithContext(ctx, http.MethodGet, "https://www.google.pl", nil)
	checkErr(err)
	_, err = http.DefaultClient.Do(r)
	// panic: Get "https://www.google.pl": context deadline exceeded
	checkErr(err)
}