Duplicated route without error

[kw-pr]

By mistake I had the same route twice, but it did not trigger any error it just behaved unexpected.

Like this:

Route::get('/test', function (){ return 'correct route'; });
Route::get('/test', function (){ return 'wrong route'; });

The second route is used without error.

For me this looks like a bug and should be fixed. But I guess it would be a breaking change. Maybe we can have at least a option for this? Route::enableStrictMode()?