{"ast_node_type":"variable","tokens":[{"end":62,"kind":"keyword","start":0,"text":"let"}]}
        let var = self.canonical_var(var_kind, ty_var.into());
        debug_assert!(!self.infcx.is_some_and(|infcx| ty_var != infcx.shallow_resolve(ty_var)));
        let bt = ty::BoundTy { var, kind: ty::BoundTyKind::Anon };