1 files changed, 27 insertions, 0 deletions
diff --git a/src/test/ui/variance/variance-covariant-arg-trait-match.rs b/src/test/ui/variance/variance-covariant-arg-trait-match.rs
new file mode 100644
index 000000000..68dd449d5
--- /dev/null
+++ b/src/test/ui/variance/variance-covariant-arg-trait-match.rs
@@ -0,0 +1,27 @@
+#![allow(dead_code)]
+
+// Test that even when `T` is only used in covariant position, it
+// is treated as invariant.
+
+trait Get<T> {
+    fn get(&self) -> T;
+}
+
+fn get_min_from_max<'min, 'max, G>()
+    where 'max : 'min, G : Get<&'max i32>
+{
+    // Previously OK, now an error as traits are invariant.
+    impls_get::<G,&'min i32>()
+    //~^ ERROR lifetime may not live long enough
+}
+
+fn get_max_from_min<'min, 'max, G>()
+    where 'max : 'min, G : Get<&'min i32>
+{
+    impls_get::<G,&'max i32>()
+    //~^ ERROR lifetime may not live long enough
+}
+
+fn impls_get<G,T>() where G : Get<T> { }
+
+fn main() { }