1 files changed, 18 insertions, 0 deletions
diff --git a/src/test/ui/const-generics/backcompat/trait-resolution-breakage.rs b/src/test/ui/const-generics/backcompat/trait-resolution-breakage.rs
new file mode 100644
index 000000000..df1c99e86
--- /dev/null
+++ b/src/test/ui/const-generics/backcompat/trait-resolution-breakage.rs
@@ -0,0 +1,18 @@
+// check-pass
+
+trait Trait<T> {
+    const ASSOC_CONST: usize = 0;
+}
+
+impl Trait<()> for u8 {}
+
+// `u8::ASSOC_CONST` is resolved today, but will be ambiguous
+// under lazy normalization.
+fn foo<T, U>() -> [(T, U); u8::ASSOC_CONST]
+where
+    u8: Trait<T> + Trait<U>,
+{
+    todo!()
+}
+
+fn main() {}