Unable to pass methods (static or instance) as closures

I tried this:

Given this starter code:

bring cloud;

let api = new cloud.Api();

api.get("/", inflight (request: cloud.ApiRequest): cloud.ApiResponse => {
  return cloud.ApiResponse {
    status: 200,
    body: "Hello, world!"
  };
});

I moved the controller logic into a static method of a class:

inflight class RequestController {
  static inflight handleRequest(request: cloud.ApiRequest): cloud.ApiResponse {
    return cloud.ApiResponse {
      status: 200,
      body: "Hello, world!"
    };
  }
}

And then tried to use that static method to handle requests:

api.get("/", RequestController.handleRequest);

This happened:

The following error was thrown during compilation:

ERROR: Cannot read properties of undefined (reading 'node')

target/gdpr.wsim.233847.tmp/.wing/preflight.js:44
       }
       const api = this.node.root.newAbstract("@winglang/sdk.cloud.Api",this,"cloud.Api");
>>     (api.get("/",RequestController.handleRequest));
     }
   }

I expected this:

I expected the console to compile and requests to be handled successfully.

Is there a workaround?

Don't use class methods for handling API requests, and define route controllers using anonymous inflight functions (like in the original code sample).

Component

Compiler

Wing Version

0.23.17

Wing Console Version

No response

Node.js Version

v20.3.1

Platform(s)

MacOS

Anything else?

• Playground link

Community Notes

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Start with the linked Playground reproduction and the compiler component described in the issue. Trace how RequestController.handleRequest is compiled when passed to api.get, comparing it with the anonymous inflight function example. Done means static and instance methods can be passed as closures, the reproduction compiles, and requests are handled successfully.