From a4b7ed7a42c716ab9f05e351f003d589124fd55d Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Wed, 17 Apr 2024 14:18:58 +0200
Subject: Adding upstream version 1.68.2+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 .../associated-types-projection-in-supertrait.rs   | 45 ++++++++++++++++++++++
 1 file changed, 45 insertions(+)
 create mode 100644 tests/ui/associated-types/associated-types-projection-in-supertrait.rs

(limited to 'tests/ui/associated-types/associated-types-projection-in-supertrait.rs')

diff --git a/tests/ui/associated-types/associated-types-projection-in-supertrait.rs b/tests/ui/associated-types/associated-types-projection-in-supertrait.rs
new file mode 100644
index 000000000..ead405fcf
--- /dev/null
+++ b/tests/ui/associated-types/associated-types-projection-in-supertrait.rs
@@ -0,0 +1,45 @@
+// run-pass
+#![allow(dead_code)]
+// Test that we are handle to correctly handle a projection type
+// that appears in a supertrait bound. Issue #20559.
+
+
+trait A
+{
+    type TA;
+
+    fn dummy(&self) { }
+}
+
+trait B<TB>
+{
+    fn foo (&self, t : TB) -> String;
+}
+
+trait C<TC : A> : B<<TC as A>::TA> { }
+
+struct X;
+
+impl A for X
+{
+    type TA = i32;
+}
+
+struct Y;
+
+impl C<X> for Y { }
+
+// Both of these impls are required for successful compilation
+impl B<i32> for Y
+{
+    fn foo (&self, t : i32) -> String
+    {
+        format!("First {}", t)
+    }
+}
+
+fn main ()
+{
+    let y = Y;
+    assert_eq!(y.foo(5), format!("First 5"));
+}
-- 
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