1 files changed, 30 insertions, 0 deletions
diff --git a/src/test/ui/const-generics/defaults/rp_impl_trait_fail.rs b/src/test/ui/const-generics/defaults/rp_impl_trait_fail.rs
new file mode 100644
index 000000000..80013e7b4
--- /dev/null
+++ b/src/test/ui/const-generics/defaults/rp_impl_trait_fail.rs
@@ -0,0 +1,30 @@
+struct Uwu<const N: u32 = 1, const M: u32 = N>;
+
+trait Trait {}
+impl<const N: u32> Trait for Uwu<N> {}
+
+fn rawr() -> impl Trait {
+    //~^ error: the trait bound `Uwu<10, 12>: Trait` is not satisfied
+    Uwu::<10, 12>
+}
+
+trait Traitor<const N: u8 = 1, const M: u8 = N> {}
+
+impl<const N: u8> Traitor<N, 2> for u32 {}
+impl Traitor<1, 2> for u64 {}
+
+fn uwu<const N: u8>() -> impl Traitor<N> {
+    //~^ error: the trait bound `u32: Traitor<N>` is not satisfied
+    1_u32
+}
+
+fn owo() -> impl Traitor {
+    //~^ error: the trait bound `u64: Traitor` is not satisfied
+    1_u64
+}
+
+fn main() {
+    rawr();
+    uwu();
+    owo();
+}