- JavaScript calls of Promise.withResolvers' resolve/reject through the
record no longer fail with an internal compiler error.
- new RegExp with the d or v flag is refused (SC1120) for literal flags
and throws a named error for computed flags, instead of SyntaxError.
- JavaScript .groups reads on matches whose regex is not traceable are
refused like TypeScript's, instead of reading undefined.
- Iterator helpers on the string iterator are refused instead of
failing at run time.
