Auto merge of #52010 - toidiu:ak-crossCrateOutlives, r=nikomatsakis

Fix: infer outlives requirements across crates

Fixes https://github.com/rust-lang/rust/issues/51858

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> { //~ ERROR 15:1: 17:2: rustc_outlives
+    bar: std::slice::IterMut<'a, T>
+}
+
+fn main() {}
+

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

@@ -0,0 +1,12 @@
+error: rustc_outlives
+  --> $DIR/cross-crate.rs:15:1
+   |
+LL | / struct Foo<'a, T> { //~ ERROR 15:1: 17:2: rustc_outlives
+LL | |     bar: std::slice::IterMut<'a, T>
+LL | | }
+   | |_^
+   |
+   = note: T : 'a
+
+error: aborting due to previous error
+