Redirects no longer work in 3.9

[bonesnap]

Hello, I am able to successfully use this code in 3.8.1:

$app->get('/', function (Request $request, Response $response) {
	if (UserState::isLoggedIn()) {
		return $response->withHeader('Location', '/dashboard');
	}

	return $response->withHeader('Location', '/login');
})->setName('home');

However in 3.9 a white screen appears with no output (I do have displayErrorDetails set to true). There are no errors in my PHP error log and no errors in Apache, either.

The only way I can get a redirect to work is to replace the return lines above with: header("Location: /dashboard"); exit; but I much prefer to use the tools provided by the framework.

Thank you for reading!

Apologies if this has already been raised; I did not see it in the issue list.

[geggleto]

Related to #2340

[akrabat]

Change your code to return $response->withHeader('Location', '/login')->withStatus(302) or return $response->withRedirect('/login');

We'll improve this for 3.9.1.

[bonesnap]

Thanks a lot! =]