better

src/bun.js/api/bun/socket.zig

@@ -1380,7 +1380,7 @@ pub fn NewSocket(comptime ssl: bool) type {
             if (this.socket.isDetached() or this.socket.isNamedPipe()) {
                 return .js_undefined;
             }
-            if (this.handlers.is_server) {
+            if (this.isServer()) {
                 globalObject.throw("Server-side sockets cannot be upgraded to TLS", .{});
                 return .zero;
             }