redefine undef

%% err1
-module(err1).
-export([undefined_function/3, undefined_lambda/3]).

undefined_function(Mod, Func, Args) ->
        [Mod, Func, Args].


undefined_lambda(Module, Fun, Args) ->
    [Module,Fun,Args].


%% test
-module(test).
-export([start/0]).

start() ->
    process_flag(error_handler, err1),
    test:afkj().


%%%%%%%%%%%
$ erlc err1.erl test.erl
$ erl
>test:start().
** exception error: undefined function test:afkj/0
>c(err1).
>test:start().
[test,afkj,[]]