{"ast_node_type":"variable","tokens":[{"end":96,"kind":"keyword","start":0,"text":"let"}]}
                let msg = self.eagerly_translate_for_subdiag(&bug, msg); // after the `arg` call
                let msg = crate::fluent_generated::errors_invalid_flushed_delayed_diagnostic_level;
                bug.sub(Note, msg, bug.span.primary_span().unwrap().into());