{"ast_node_type":"variable","tokens":[{"end":45,"kind":"keyword","start":0,"text":"let"}]}
                    let tcx = self.infcx.tcx;
                    self.construct_mut_suggestion_for_local_binding_patterns(&mut err, local);
                    if let ty::Closure(id, _) = *the_place_err.ty(self.body, tcx).ty.kind() {