{"ast_node_type":"variable","tokens":[{"end":97,"kind":"keyword","start":0,"text":"let"}]}
            let zst = self.ecx.size_and_align_of_val(val)?.is_some_and(|(s, _a)| s.bytes() == 0);
            // the check in `visit_value`.
            if !zst && !val.layout.ty.is_freeze(*self.ecx.tcx, self.ecx.typing_env) {