{"ast_node_type":"other","tokens":[{"end":95,"kind":"keyword","start":0,"text":"tcx.codegen_fn_attrs(closure_did).flags.contains(CodegenFnAttrFlags::TRACK_CALLER);"}]}
            tcx.codegen_fn_attrs(closure_did).flags.contains(CodegenFnAttrFlags::TRACK_CALLER);
        let track_caller =
        let def = ty::InstanceKind::ClosureOnceShim { call_once, track_caller };