{"ast_node_type":"variable","tokens":[{"end":42,"kind":"keyword","start":0,"text":"let"}]}
        let expr_ty = self.expr_ty(expr)?;
    fn cat_expr_unadjusted(&self, expr: &hir::Expr<'_>) -> Result<PlaceWithHirId<'tcx>, Cx::Error> {
        match expr.kind {