test to capture that cross crate outlives requirements are not inferred

src/test/ui/rfc-2093-infer-outlives/cross-crate.rs

@@ -0,0 +1,20 @@
+// Copyright 2015 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.
+
+#![feature(rustc_attrs)]
+#![feature(infer_outlives_requirements)]
+
+// #[rustc_outlives]
+struct Foo<'a, T> {
+    bar: std::slice::IterMut<'a, T> //~ ERROR 16:5: 16:36: the parameter type `T` may not live long enough [E0309]
+}
+
+fn main() {}
+

src/test/ui/rfc-2093-infer-outlives/cross-crate.stderr

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+error[E0309]: the parameter type `T` may not live long enough
+  --> $DIR/cross-crate.rs:16:5
+   |
+LL | struct Foo<'a, T> {
+   |                - help: consider adding an explicit lifetime bound `T: 'a`...
+LL |     bar: std::slice::IterMut<'a, T> //~ ERROR 16:5: 16:36: the parameter type `T` may not live long enough [E0309]
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |
+note: ...so that the type `T` will meet its required lifetime bounds
+  --> $DIR/cross-crate.rs:16:5
+   |
+LL |     bar: std::slice::IterMut<'a, T> //~ ERROR 16:5: 16:36: the parameter type `T` may not live long enough [E0309]
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0309`.