ECMAScript syntax: Comment affecting semantics of RegExp

[SMotaal]

• VSCode Version: Version 1.33.1 (1.33.1)
• OS Version: macOS 10.14.4 (18E226)

Steps to Reproduce:

The following is contrived to show this particular case.

/* prettier-ignore */
const dummy  = (div, g) => {
  ( []              /([(div)])/g / [] );
  ( ([])            /([(div)])/g / [] );
  ( [] /* */        /([(div)])/g / [] );
};

1. Paste this code into a new javascript file
2. Ignore any type-specific errors (because it is still valid ES syntax)
3. Note the last statement highlights as RegExp but still tokenizes correctly by tsserver.

Does this issue occur when all extensions are disabled?: Not tested