Function onError

packages/plugins/mcp/src/testing/server.ts:285–288

(cause: Error)

      const port = yield* Effect.callback<number, McpTestServerError>((resume) => {
        const onError = (cause: Error) => {
          nodeServer.off("error", onError);
          resume(Effect.fail(new McpTestServerError({ cause })));
        };
        nodeServer.once("error", onError);
        nodeServer.listen(0, () => {
          nodeServer.off("error", onError);