Class member incorrectly stripped from .d.ts output if @internal is mentioned in unrelated comment

🔎 Search Terms

internal, .d.ts, stripInternal

🕗 Version & Regression Information

This issue appears to be present in all version of TypeScript (tested down to 3.3.3).

⏯ Playground Link

https://www.typescriptlang.org/play?stripInternal=true&ts=5.3.3#code/KYDwDg9gTgLgBAYwDYEMDOa4DEITgbwCg44B6AKnOJPLgGUALCAVyQBM4AjYONGKAJZgwwNtTi0AAgIB2MYFBkok48qWpomrNgCFgdfkJEcAvHACMAbkLVSpOABUA8gBEnALjgBbFAE9u3igA1jwwDAKY0nIKSkgA-LaUqvRa7BIyEDC0AXyCwqKq6iSaLOwAcpl6BnnGcGYATNYAvkA

💻 Code

export class Foo {
  /**
   * Should be stripped
   * @internal
   */
  shouldBeStripped = 1;

  // TODO: maybe make this @internal?
  /**
   * Should *not* be stripped
   */
  shouldNotBeStripped = 2;
}

🙁 Actual behavior

The compiler should preserve the Foo.shouldNotBeStripped property while removing Foo.shouldBeStripped.

🙂 Expected behavior

Both Foo.shouldNotBeStripped and Foo.shouldBeStripped are removed.

Additional information about the issue

If a class member has an unrelated comment mentioning @internal preceding it, TypeScript will drop that member from the .d.ts output, even though that's not the intent since there's another comment after it. Only the first comment should be checked for @internal.

Reproduce el comportamiento usando el TypeScript Playground enlazado con stripInternal habilitado y la clase proporcionada. Rastrea el procesamiento de la salida de declaraciones para comentarios consecutivos y añade una prueba de regresión que cubra una mención independiente de @internal antes de un comentario @internal separado. Se considera completado cuando solo se omite shouldBeStripped, mientras que shouldNotBeStripped permanece en la salida .d.ts.