{"ast_node_type":"variable","tokens":[{"end":93,"kind":"keyword","start":0,"text":"if"}]}
                    if let ty::Closure(id, _) = *the_place_err.ty(self.body, tcx).ty.kind() {
                    let tcx = self.infcx.tcx;
                        self.show_mutating_upvar(tcx, id.expect_local(), the_place_err, &mut err);