triggered error as requested
main.(*app).debugError
	github.com/daaku/bento/main.go:236
main.run.(*app).wrap.func1
	github.com/daaku/bento/main.go:227
net/http.HandlerFunc.ServeHTTP
	net/http/server.go:2286
net/http.(*ServeMux).ServeHTTP
	net/http/server.go:2828
main.run.secureHandler.func20
	github.com/daaku/bento/main.go:644
net/http.HandlerFunc.ServeHTTP
	net/http/server.go:2286
main.run.(*CrossOriginProtection).Handler.func21
	net/http/csrf.go:216
net/http.HandlerFunc.ServeHTTP
	net/http/server.go:2286
net/http.serverHandler.ServeHTTP
	net/http/server.go:3311
net/http.(*conn).serve
	net/http/server.go:2073
runtime.goexit
	runtime/asm_amd64.s:1771