emitting declarations for a single file adds global declarations which have ts errors

[brc-dd]

Vue - Official extension or vue-tsc version

2.2.8

VSCode version

1.97.2

Vue version

3.5.13

TypeScript version

5.7.3

System Info

System:
    OS: macOS 15.3.1
    CPU: (10) arm64 Apple M2 Pro
    Memory: 107.77 MB / 32.00 GB
    Shell: 5.9 - /bin/zsh
  Binaries:
    Node: 23.7.0 - ~/.local/state/fnm_multishells/42863_1740988676037/bin/node
    Yarn: 1.22.22 - ~/.local/state/fnm_multishells/42863_1740988676037/bin/yarn
    npm: 10.9.2 - ~/.local/state/fnm_multishells/42863_1740988676037/bin/npm
    pnpm: 9.15.4 - ~/.local/state/fnm_multishells/42863_1740988676037/bin/pnpm
    bun: 1.2.0 - /opt/homebrew/bin/bun
  Browsers:
    Safari: 18.3

package.json dependencies

{
  "private": true,
  "type": "module",
  "scripts": {
    "check": "rimraf dist && vue-tsc --declaration --emitDeclarationOnly src/App.vue --outFile dist/App.vue.d.ts"
  },
  "dependencies": {
    "vue": "^3.5.13"
  },
  "devDependencies": {
    "@tsconfig/node22": "^22.0.0",
    "@types/node": "^22.13.4",
    "@vitejs/plugin-vue": "^5.2.1",
    "@vue/tsconfig": "^0.7.0",
    "npm-run-all2": "^7.0.2",
    "rimraf": "^6.0.1",
    "typescript": "~5.7.3",
    "vite": "^6.1.0",
    "vite-plugin-vue-devtools": "^7.7.2",
    "vue-tsc": "^2.2.8"
  }
}

Steps to reproduce

1. clone https://github.com/brc-dd/vue-tsc-ts-ignore-strip
2. run pnpm i; pnpm check
3. open dist/App.vue.d.ts to see errors

What is expected?

The source has // @ts-ignore in these parts:

language-tools/packages/language-core/lib/codegen/globalTypes.ts

Lines 138 to 141 in 9b6911a

	// @ts-ignore
	function __VLS_getSlotParams<T>(slot: T): Parameters<__VLS_PickNotAny<NonNullable<T>, (...args: any[]) => any>>;
	// @ts-ignore
	function __VLS_getSlotParam<T>(slot: T): Parameters<__VLS_PickNotAny<NonNullable<T>, (...args: any[]) => any>>[0];

These should be present in the output dist too. Or better fix those types if possible 👀 Or maybe not emit global types like when whole project is compiled.

What is actually happening?

Those comments are getting stripped somewhere.

Link to minimal reproduction

https://github.com/brc-dd/vue-tsc-ts-ignore-strip

Any additional comments?

x-ref: #5232 (comment)