syntax_data: {"ast_node_type":"other","tokens":[{"end":84,"kind":"keyword","start":0,"text":"debug!(\"super_combine_tys::<{}>({:?},"}]}
source_snippet:     debug!("super_combine_tys::<{}>({:?}, {:?})", std::any::type_name::<R>(), a, b);
context_before: {
context_after:     debug_assert!(!a.has_escaping_bound_vars());