1 files changed, 24 insertions, 0 deletions
diff --git a/src/test/ui/specialization/min_specialization/issue-79224.rs b/src/test/ui/specialization/min_specialization/issue-79224.rs
new file mode 100644
index 000000000..408732fe9
--- /dev/null
+++ b/src/test/ui/specialization/min_specialization/issue-79224.rs
@@ -0,0 +1,24 @@
+#![feature(min_specialization)]
+use std::fmt::{self, Display};
+
+pub enum Cow<'a, B: ?Sized + 'a, O = <B as ToOwned>::Owned>
+where
+    B: ToOwned,
+{
+    Borrowed(&'a B),
+    Owned(O),
+}
+
+impl ToString for Cow<'_, str> {
+    fn to_string(&self) -> String {
+        String::new()
+    }
+}
+
+impl<B: ?Sized> Display for Cow<'_, B> { //~ ERROR: the trait bound `B: Clone` is not satisfied [E0277]
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { //~ ERROR: the trait bound `B: Clone` is not satisfied [E0277]
+        write!(f, "foo")
+    }
+}
+
+fn main() {}