{"ast_node_type":"variable","tokens":[{"end":83,"kind":"keyword","start":0,"text":"if"}]}
                if let Some((_, alloc)) = self.ecx.memory.alloc_map.get(alloc_id) {
                let mutbl = tcx.global_alloc(alloc_id).mutability(tcx, self.ecx.typing_env);
                    assert_eq!(alloc.mutability, mutbl);