memory leak in defaultWorkerFactory

[SimonSiefke]

Does this issue occur when all extensions are disabled?: Yes

• VS Code Version: 1.84.2
• OS Version: Ubuntu 23.04

Steps to Reproduce:

Test Script

(Unfortunately the test doesn't work on macos, but it should work on windows and linux):

git clone git@github.com:SimonSiefke/vscode-memory-leak-finder.git &&
cd vscode-memory-leak-finder &&
git checkout v5.25.0 &&
npm ci &&
node packages/cli/bin/test.js --cwd packages/e2e  --check-leaks --measure-after --measure event-listeners  --only explorer.set-files &&
cat .vscode-memory-leak-finder-results/event-listeners/explorer.set-files.json

Output

{
  "eventListeners": [
    {
      "type": "error",
      "description": "(err) => {\n                (0, simpleWorker_1.logOnceWebWorkerWarning)(err);\n                this._webWorkerFailedBeforeError = err;\n                onErrorCallback(err);\n            }",
      "stack": ["listener (vscode/out/vs/base/browser/defaultWorkerFactory.js:127:111)"],
      "count": 1,
      "originalStack": ["vscode/src/vs/base/browser/defaultWorkerFactory.ts:155:102"],
      "originalName": null
    },
    {
      "type": "message",
      "description": "function (ev) {\n                    onMessageCallback(ev.data);\n                }",
      "stack": ["listener (vscode/out/vs/base/browser/defaultWorkerFactory.js:88:39)"],
      "count": 1,
      "originalStack": ["vscode/src/vs/base/browser/defaultWorkerFactory.ts:105:27"],
      "originalName": null
    }
  ],
  "isLeak": true
}