Build script hangs while building svelte app using TypeScript 4.4.2

[professionalsixoneg]

Describe the bug

Latest update of TypeScript breaks the build process for svelte application using TS. Noticed the issue 7 days back with the latest release of TypeScript labelled 4.4.2.

Workaround: edit package.json and update the typescript dependency limiting it to 4.3.x, this will resolve the npm run build hang issue.

Reproduction

• Download svelte-app.zip file and run npm install.
• Switch the language to TypeScript by executing node scripts/setupTypeScript.js and execute npm install
• Build the application using npm run build

The process hangs.

Workaround:

• Open package.json file and replace "typescript": "^4.0.0" to "typescript": "4.3.5"
• Run npm install and npm run build
• This will build the application normally.

Logs

No response

System Info

System:
    OS: Windows 10 10.0.19043
    CPU: (8) ia32 Intel(R) Core(TM) i7-2600 CPU @ 3.40GHz
    Memory: 3.88 GB / 7.98 GB
  Binaries:
    Node: 14.17.4 - svelte-playground\node.EXE
    npm: 6.14.14 - svelte-playground\npm.CMD
  Browsers:
    Chrome: 92.0.4515.159
    Edge: Spartan (44.19041.1023.0), Chromium (92.0.902.84)
    Internet Explorer: 11.0.19041.906
  npmPackages:
    rollup: ^2.3.4 => 2.56.3
    svelte: ^3.0.0 => 3.42.4

Severity

blocking an upgrade

[Conduitry]

This is almost certainly rollup/plugins#983