I'm trying to implement a simple server that broadcasts messages received from a websocket to all other websockets. For this I'm keeping track of all open websockets in a global variable: 

WebSocket[uint] sockets;
uint            id = 0;
void handleConn(WebSocket ws) {
    sockets[id++] = ws;
    ...
}
static this() {
    auto router = new URLRouter;
    router.get("/ws", handleWebSockets(&handleConn));
}

This version of handleWebSockets providing a WebSocket is deprecated. Instead, I should use a scope parameter: 

void handleConn(scope WebSocket ws) { ... }

Currently dmd accepts this change, even though it would leak a reference to a scope parameter.

How can I implement broadcasting with scope WebSocket?