Overview

That last || createIsolatedProgram(code, extra) should never be hit. We believe it was a just-in-case fallback added long ago that is no longer (and maybe never was) needed.

Removing that case may make #5855 easier.

Marking as accepting PRs with the caveat that everything still has to work as expected. Which may or may not be doable. Good luck! 😄

This issue is from a pairing I had with @bradzacher going over the parser internals.