Importing and requiring a .js file leads to duplicate module evaluation

[dsherret]

// main.js
import "./file.js";
import { createRequire } from "node:module";

const require = createRequire(import.meta.url);
require("./file.js");

// file.js
let i = 0;
setInterval(() => {
  i++;
  console.log(i);
}, 1_000);

Output:

> deno run -A main.js
1
1
2
2
3
3

Note this works fine when file.js is renamed to file.cjs.

[lucacasonato]

I think this was also fixed by denoland/deno_core@f217fe0. Let's add a test to CLI when rolling deno_core.