Java StackOverflowError in code macro when choosing js language

I'm getting the exact same error on a scheduler job page. However, this seems to be only a display failure when viewing the job page. The job itself gets executed and runs successfully.

In my script there is some slashy regex with bare " and ' characters. From my research Pygments' Groovy lexer has no rule for slashy strings, so those quotes open string states that never close.