Adding prettier-ignore comment in JSX doubles the comment

[etr2460]

Prettier 2.0.5
Playground link

--parser babel

Input:

function HelloWorld() {
  return (
    <div
      {...{} /* 
      // @ts-ignore */ /* prettier-ignore */}
      invalidProp="HelloWorld"
    >
      test
    </div>
  );
}

Output:

function HelloWorld() {
  return (
    <div
      {
        ...{} /* 
      // @ts-ignore */ /* prettier-ignore */ /* 
      // @ts-ignore */ /* prettier-ignore */
      }
      invalidProp="HelloWorld"
    >
      test
    </div>
  );
}

Expected behavior:
I would expect prettier to ignore this ugly block entirely. This is probably a pretty uncommon use case, but I was trying to get a ts-ignore comment to work in JSX by following instructions here (microsoft/TypeScript#27552 (comment)) and ended up in this state where every time I saved the file, prettier auto formatting would double the number of comments I had

[thorn0]

While, obviously, this is a bug, wouldn't the following work for your case @etr2460 ?

function HelloWorld() {
  return (
    <div
      // @ts-ignore
      invalidProp="HelloWorld"
    >
      test
    </div>
  );
}