1 files changed, 32 insertions, 0 deletions
diff --git a/src/test/ui/compile-fail-migration/dep-graph-variance-alias.rs b/src/test/ui/compile-fail-migration/dep-graph-variance-alias.rs
new file mode 100644
index 00000000000..18cfd001804
--- /dev/null
+++ b/src/test/ui/compile-fail-migration/dep-graph-variance-alias.rs
@@ -0,0 +1,32 @@
+// Copyright 2016 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.
+
+// Test that changing what a `type` points to does not go unnoticed
+// by the variance analysis.
+
+// compile-flags: -Z query-dep-graph
+
+#![feature(rustc_attrs)]
+#![allow(dead_code)]
+#![allow(unused_variables)]
+
+fn main() { }
+
+struct Foo<T> {
+    f: T
+}
+
+#[rustc_if_this_changed(Krate)]
+type TypeAlias<T> = Foo<T>;
+
+#[rustc_then_this_would_need(ItemVariances)] //~ ERROR OK
+struct Use<T> {
+    x: TypeAlias<T>
+}