[perl #127822] [BUG] Doing two S/// with an `andthen` between them messes up $_ in Rakudo

[Zoffix Znet via RT]

Thank you for the report. This is now fixed.

Fix: https://github.com/rakudo/rakudo/commit/97359ae42e
Test unfudged in: https://github.com/perl6/roast/commit/b15e0a0d9b