1 files changed, 21 insertions, 0 deletions
diff --git a/tests/ui/regions/regions-outlives-projection-trait-def.rs b/tests/ui/regions/regions-outlives-projection-trait-def.rs
new file mode 100644
index 000000000..5c37a585a
--- /dev/null
+++ b/tests/ui/regions/regions-outlives-projection-trait-def.rs
@@ -0,0 +1,21 @@
+// Test that `<F as Foo<'a>>::Type: 'b`, where `trait Foo<'a> { Type:
+// 'a; }`, does not require that `F: 'b`.
+
+// check-pass
+#![allow(dead_code)]
+
+trait SomeTrait<'a> {
+    type Type: 'a;
+}
+
+impl<'a: 'c, 'c, T> SomeTrait<'a> for &'c T where T: SomeTrait<'a> {
+    type Type = <T as SomeTrait<'a>>::Type;
+    //          ~~~~~~~~~~~~~~~~~~~~~~~~~~
+    //                       |
+    // Note that this type must outlive 'a, due to the trait
+    // definition.  If we fall back to OutlivesProjectionComponents
+    // here, then we would require that `T:'a`, which is too strong.
+}
+
+
+fn main() { }