From 698f8c2f01ea549d77d7dc3338a12e04c11057b9 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Wed, 17 Apr 2024 14:02:58 +0200
Subject: Adding upstream version 1.64.0+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 src/test/ui/traits/normalize-supertrait.rs | 37 ++++++++++++++++++++++++++++++
 1 file changed, 37 insertions(+)
 create mode 100644 src/test/ui/traits/normalize-supertrait.rs

(limited to 'src/test/ui/traits/normalize-supertrait.rs')

diff --git a/src/test/ui/traits/normalize-supertrait.rs b/src/test/ui/traits/normalize-supertrait.rs
new file mode 100644
index 000000000..021a93eac
--- /dev/null
+++ b/src/test/ui/traits/normalize-supertrait.rs
@@ -0,0 +1,37 @@
+// Regression test for #77653
+// When monomorphizing `f` we need to prove `dyn Derived<()>: Base<()>`. This
+// requires us to normalize the `Base<<() as Proj>::S>` to `Base<()>` when
+// comparing the supertrait `Derived<()>` to the expected trait.
+
+// build-pass
+
+trait Proj {
+    type S;
+}
+
+impl Proj for () {
+    type S = ();
+}
+
+impl Proj for i32 {
+    type S = i32;
+}
+
+trait Base<T> {
+    fn is_base(&self);
+}
+
+trait Derived<B: Proj>: Base<B::S> + Base<()> {
+    fn is_derived(&self);
+}
+
+fn f<P: Proj>(obj: &dyn Derived<P>) {
+    obj.is_derived();
+    Base::<P::S>::is_base(obj);
+    Base::<()>::is_base(obj);
+}
+
+fn main() {
+    let x: fn(_) = f::<()>;
+    let x: fn(_) = f::<i32>;
+}
-- 
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