unmappable-declaration-initializer.ts:8:9 - error SC2020: 'WeakRef<object>' is part of the standard library types but has no scriptc lowering yet

  7 | function run(): void {
  8 |   const ref: WeakRef<object> = touch() as unknown as WeakRef<object>;
    |         ^~~
  9 | }

  hint: the type checker sees the full standard library, but only the supported surface compiles (https://scriptc.dev/limitations)