{"ast_node_type":"other","tokens":[{"end":19,"kind":"keyword","start":0,"text":"#[track_caller]"}]}
    #[track_caller]
impl<G: EmissionGuarantee> Diagnostic<'_, G> for InvalidMetadataFiles {
    fn into_diag(self, dcx: DiagCtxtHandle<'_>, level: Level) -> Diag<'_, G> {