{"ast_node_type":"other","tokens":[{"end":80,"kind":"keyword","start":0,"text":"//"}]}
                // HACK(#114936): `WF(sig)` does not imply `WF(normalized(sig))`
                let sig = self.deeply_normalize(unnormalized_sig, term_location);
                // with built-in `Fn` implementations, since the impl may not be