Textmate grammar generator produces broken expression for comments

After running the generator from #1329 for our grammar, the resulting expression for comments is this:

"match": "/\\*\\*[^\\*](/\\*[^\\*]//[^\\\n\\\r]*(\\\r?\\\n)?",

First, its missing a closing bracket:

"match": "/\\*\\*[^\\*](/\\*[^\\*]//[^\\\n\\\r]*(\\\r?\\\n)?)",

With this change, I do get highlighting in VS Code (using the generated JSON file), but comments still don't work. So something in the expression is still broken. Its not clear where the missing bracket belongs, I tried different places and it doesn't help making comments work.

This website is useful for quick testing: https://www.leskoff.com/s02050-0

The rules for comments we have are:

terminal DOC_COMMENT:
    '/**' !'*' -> '*/'
;

@Override
terminal ML_COMMENT:
    ('/*' !'*' -> '*/') | ('/***' -> '*/')
;

@Override
terminal SL_COMMENT:
    '//' !('\n'|'\r')* ('\r'? '\n')?
;

Start with the TextMate grammar generator introduced by #1329 and reproduce the generated JSON for the DOC_COMMENT, ML_COMMENT, and SL_COMMENT rules shown here. Check the generated match expression with the linked regex tester and VS Code; done means the expression is valid and all three comment forms highlight correctly.