Check Aggregate predicates

src/test/compile-fail/nll/where_clauses_in_structs.rs

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+// Copyright 2017 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+// compile-flags: -Z borrowck=mir -Z nll
+
+#![allow(dead_code)]
+
+use std::cell::Cell;
+
+struct Foo<'a: 'b, 'b> {
+    x: Cell<&'a u32>,
+    y: Cell<&'b u32>,
+}
+
+fn bar<'a, 'b>(x: Cell<&'a u32>, y: Cell<&'b u32>) {
+    Foo { x, y };
+    //~^ ERROR free region `'_#1r` does not outlive free region `'_#2r`
+    //~| WARNING not reporting region error due to -Znll
+}
+
+fn main() {}