{"ast_node_type":"other","tokens":[{"end":88,"kind":"keyword","start":0,"text":"ecx.probe(|&result|"}]}
                    ecx.probe(|&result| ProbeKind::RigidAlias { result }).enter(|this| {
                self.assemble_and_merge_candidates(proven_via, goal, |ecx| {
                        this.structurally_instantiate_normalizes_to_term(