1 files changed, 29 insertions, 0 deletions
diff --git a/src/test/ui/const-generics/defaults/rp_impl_trait.rs b/src/test/ui/const-generics/defaults/rp_impl_trait.rs
new file mode 100644
index 000000000..dde8eea45
--- /dev/null
+++ b/src/test/ui/const-generics/defaults/rp_impl_trait.rs
@@ -0,0 +1,29 @@
+// run-pass
+struct Uwu<const N: u32 = 1, const M: u32 = N>;
+
+trait Trait {}
+impl<const N: u32> Trait for Uwu<N> {}
+
+fn rawr<const N: u32>() -> impl Trait {
+    Uwu::<N>
+}
+
+trait Traitor<const N: u8 = 1, const M: u8 = N> { }
+
+impl<const N: u8> Traitor<N> for u32 {}
+impl Traitor<1, 1> for u64 {}
+
+fn uwu<const N: u8>() -> impl Traitor<N> {
+    1_u32
+}
+
+fn owo() -> impl Traitor {
+    1_u64
+}
+
+fn main() {
+    rawr::<3>();
+    rawr::<7>();
+    uwu::<{ u8::MAX }>();
+    owo();
+}