ExprKind::Closure(box Closure {
binder,
capture_clause: _,
+ constness,
asyncness,
movability: _,
fn_decl,
fn_arg_span: _,
}) => {
vis.visit_closure_binder(binder);
+ visit_constness(constness, vis);
vis.visit_asyncness(asyncness);
vis.visit_fn_decl(fn_decl);
vis.visit_expr(body);