Panic when dumping a gorilla named route

[fgm]

Seems similar to #18 but still happens with current version:

package main

import (
	"fmt"
	"log"
	"net/http"

	"github.com/gorilla/mux"
	"github.com/sanity-io/litter"
)

func main() {
	r := mux.NewRouter()

	r.HandleFunc(`/foo`, AnyHandler).Name("named")
	r.HandleFunc("/", AnyHandler).Name("front")

	srv := &http.Server{
		Handler: r,
		Addr:    "127.0.0.1:8000",
	}

	log.Fatal(srv.ListenAndServe())
}

func AnyHandler(w http.ResponseWriter, r *http.Request) {
	route := mux.CurrentRoute(r)
	litter.Config.HidePrivateFields = false
	fmt.Fprintln(w, route.GetName())
	defer func() {
		p := recover()
		if p != nil {
			fmt.Printf("Recovered: %#v\n", p)
		}
	}()
	litter.Sdump(route)
}

• Navigate to either / or /foo
• Panics with: "reflect.Value.Interface: cannot return value obtained from unexported field or method"
• Does not panic if only one of the routes is handled
• Does not panic if either of the routes is not named