never as a return type, on a router that always aborts

A helper that throws an HTTP exception was typed void, so every caller had to write an unreachable return statement to satisfy the analyser.

// before
function abort(int $status): void
{
    throw new HttpException($status);
}

if (! $order) {
    abort(404);
    return null;    // unreachable, and required
}

// after
function abort(int $status): never
{
    throw new HttpException($status);
}

if (! $order) {
    abort(404);     // the analyser knows this is the end
}

never means the function does not return at all — it throws, exits, or loops forever — which is different from returning nothing. The practical gain is that control-flow analysis follows it: an analyser stops complaining about a missing return, and narrowing after the call is correct rather than assumed. A function typed never that does return is a fatal error, which is the right severity.