syntax_data: {"ast_node_type":"other","tokens":[{"end":51,"kind":"keyword","start":0,"text":"stack.cache().on_completion(stack.dfn);"}]}
source_snippet:             stack.cache().on_completion(stack.dfn);
context_before:             self.insert_evaluation_cache(param_env, fresh_trait_pred, dep_node, result);
context_after:         } else {