I realize now this is not a bug, but a feature not implemented. To re-populate the form modify postLogin() in AuthController.php to flash the input:

public function postLogin(LoginRequest $request)
{
	if ($this->auth->attempt($request->only('email', 'password')))
	{
		return redirect('/');
	}

	return redirect('/auth/login')
                     #Flash input
                     ->withInput(Input::except('password'))
                     ->withErrors([
		'email' => 'These credentials do not match our records.',
	]);
}

and use the old data in the view to set the value of the input:

{{ Form::email('email', old('email'), ['class' => 'form-control']) }}