From 218caa410aa38c29984be31a5229b9fa717560ee Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Wed, 17 Apr 2024 14:19:13 +0200
Subject: Merging upstream version 1.68.2+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 .../correct-supertrait-substitution.rs             | 38 ++++++++++++++++++++++
 1 file changed, 38 insertions(+)
 create mode 100644 tests/ui/traits/trait-upcasting/correct-supertrait-substitution.rs

(limited to 'tests/ui/traits/trait-upcasting/correct-supertrait-substitution.rs')

diff --git a/tests/ui/traits/trait-upcasting/correct-supertrait-substitution.rs b/tests/ui/traits/trait-upcasting/correct-supertrait-substitution.rs
new file mode 100644
index 000000000..eae5cf8d5
--- /dev/null
+++ b/tests/ui/traits/trait-upcasting/correct-supertrait-substitution.rs
@@ -0,0 +1,38 @@
+// run-pass
+#![feature(trait_upcasting)]
+
+trait Foo<T: Default + ToString>: Bar<i32> + Bar<T> {}
+trait Bar<T: Default + ToString> {
+    fn bar(&self) -> String {
+        T::default().to_string()
+    }
+}
+
+struct S1;
+
+impl Bar<i32> for S1 {}
+impl Foo<i32> for S1 {}
+
+struct S2;
+impl Bar<i32> for S2 {}
+impl Bar<bool> for S2 {}
+impl Foo<bool> for S2 {}
+
+fn test1(x: &dyn Foo<i32>) {
+    let s = x as &dyn Bar<i32>;
+    assert_eq!("0", &s.bar().to_string());
+}
+
+fn test2(x: &dyn Foo<bool>) {
+    let p = x as &dyn Bar<i32>;
+    assert_eq!("0", &p.bar().to_string());
+    let q = x as &dyn Bar<bool>;
+    assert_eq!("false", &q.bar().to_string());
+}
+
+fn main() {
+    let s1 = S1;
+    test1(&s1);
+    let s2 = S2;
+    test2(&s2);
+}
-- 
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