1 files changed, 28 insertions, 0 deletions
diff --git a/src/test/ui/compile-fail-migration/variance-trait-object-bound.rs b/src/test/ui/compile-fail-migration/variance-trait-object-bound.rs
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index 00000000000..b120588ecab
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+++ b/src/test/ui/compile-fail-migration/variance-trait-object-bound.rs
@@ -0,0 +1,28 @@
+// Copyright 2014 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.
+
+// Checks that regions which appear in a trait object type are
+// observed by the variance inference algorithm (and hence
+// `TOption` is contavariant w/r/t `'a` and not bivariant).
+//
+// Issue #18262.
+
+#![feature(rustc_attrs)]
+
+use std::mem;
+
+trait T { fn foo(&self); }
+
+#[rustc_variance]
+struct TOption<'a> { //~ ERROR [-]
+    v: Option<Box<T + 'a>>,
+}
+
+fn main() { }