syntax_data: {"ast_node_type":"other","tokens":[{"end":46,"kind":"keyword","start":0,"text":"if"}]}
source_snippet:             if self.coinductive_match(cycle) {
context_before:             let cycle = cycle.map(|stack| stack.obligation.predicate.upcast(tcx));
context_after:                 debug!("evaluate_stack --> recursive, coinductive");