{"ast_node_type":"other","tokens":[{"end":42,"kind":"keyword","start":0,"text":"match"}]}
    match (src_ty.kind(), dst_ty.kind()) {
    debug!("unsize_ptr: {:?} => {:?}", src_ty, dst_ty);
        (&ty::Ref(_, a, _), &ty::Ref(_, b, _) | &ty::RawPtr(b, _))