.go

package main

import (
	"log"
	"net/http"
)

type Handler struct{}

func (handler Handler) ServeHTTP(
	response http.ResponseWriter, request *http.Request,
) {
	defer func() {
		if err := recover(); err != nil {
			log.Printf("do not panic, please")
		}
	}()

	// how to handle panic in this routine?
	go func() {
		var blah *Handler
		blah.ServeHTTP(nil, nil)
	}()
}

func main() {
	handler := Handler{}
	http.ListenAndServe(":9090", handler)
}