syntax_data: {"ast_node_type":"variable","tokens":[{"end":84,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:         let cache_fresh_trait_pred = self.infcx.freshen(stack.obligation.predicate);
context_before:         // replaced with fresh types starting from index 0.
context_after:         debug!(?cache_fresh_trait_pred);