{"ast_node_type":"variable","tokens":[{"end":51,"kind":"keyword","start":0,"text":"let"}]}
        let ty = self.typeck_results.expr_ty(expr);
    fn check_is_ty_uninhabited(&mut self, expr: &Expr<'_>, succ: LiveNode) -> LiveNode {
        let m = self.ir.tcx.parent_module(expr.hir_id).to_def_id();