macro_rules! walk_list {
($visitor: expr, $method: ident, $list: expr $(, $($extra_args: expr),* )?) => {
{
- #[cfg_attr(not(bootstrap), allow(for_loops_over_fallibles))]
+ #[allow(for_loops_over_fallibles)]
for elem in $list {
$visitor.$method(elem $(, $($extra_args,)* )?)
}