rustc: de-@ some RefCell's.
rustc: de-@ freevars.
rustc: de-@ lint.
rustc: de-@ resolve.
rustc: de-@ borrowck.
rustc: de-@ mem_categorization.
rustc: de-@ metadata::cstore.
rustc: de-@ trans::_match.
rustc: de-@ ty::ParamBounds.
rustc: remove obsolete monomorphization modes.
rustc: slightly optimize make_mono_id to not clone lots of vectors.
rustc: de-@ mono_id.
rustc: de-@ param_substs.
rustc: de-@ ty::type_err.
rustc: remove ty::Impl.
rustc: de-@ middle::ty.
rustc: de-@ debuginfo.
rustc: de-@ adt::Repr.
rustc: de-@ stats.
rustc: remove typeck::isr_alist.