···456456 // redeclaration occurs.
457457 if let Decision::Run { body } = fallback {
458458 for (variable, _) in body.bindings.iter() {
459459- if let Some(_) = old_scope.get(variable) {
459459+ if old_scope.get(variable).is_some() {
460460 let new_variable_name = self.variables.next_local_var(variable);
461461462462 let _ = self