{"ast_node_type":"variable","tokens":[{"end":51,"kind":"keyword","start":0,"text":"let"}]}
        let layout = self.layout_of(pointee_type)?;
            val.layout.ty.builtin_deref(true).expect("`ref_to_mplace` called on non-ptr type");
        let (ptr, meta) = val.to_scalar_and_meta();