The bootstrap-seed build rejected `host.rcHelpers ?? []` in shapes.ts
(SC2011: `Set<string> | never[]` has no static representation) and the
spread of that union into a string[] literal (SC1090). A small helper copies
the set's keys into a plain array (empty when inline RC is off), which both
callers iterate; emitInlineRcHelpers still sorts its copy. Behavior is
unchanged.
Malte Ubl
90d024cd8c