Can't load mapped entrypoint

[marvinhagemeister]

Steps to reproduce:

1. Create deno.json with:

{
  "imports": {
    "mapped": "./foo.ts"
  }
}

2. Create file foo.ts with:

console.log("hey");

3. Create file main.ts with:

import { ResolutionMode, Workspace } from "@deno/loader";

const loader = await new Workspace().createLoader({
  entrypoints: ["mapped"],
});

const spec = await loader.resolve("mapped", undefined, ResolutionMode.Import);
await loader.load(spec);

4. Run deno run -A main.ts

Output:

$ deno run -A main.ts
error: Uncaught (in promise) Error: Module not found "file:///Users/marvinh/dev/denoland/esbuild-plugin-deno/mapped".
  const ret = new Error(getStringFromWasm0(arg0, arg1));
              ^
    at __wbindgen_error_new (https://jsr.io/@deno/loader/0.1.0/src/lib/rs_lib.internal.js:983:15)
    at <anonymous> (wasm://wasm/0138c452:1:4060238)
    at <anonymous> (wasm://wasm/0138c452:1:3861913)
    at <anonymous> (wasm://wasm/0138c452:1:408120)
    at <anonymous> (wasm://wasm/0138c452:1:3054212)
    at <anonymous> (wasm://wasm/0138c452:1:4026346)
    at <anonymous> (wasm://wasm/0138c452:1:4076747)
    at __wbg_adapter_44 (https://jsr.io/@deno/loader/0.1.0/src/lib/rs_lib.internal.js:251:8)
    at real (https://jsr.io/@deno/loader/0.1.0/src/lib/rs_lib.internal.js:155:14)
    at ext:core/01_core.js:294:9

[marvinhagemeister]

FYI: In Fesh I can work without this. Just opening this because it's something I came across.