1 files changed, 26 insertions, 0 deletions
diff --git a/src/test/ui/const-generics/generic_const_exprs/eval-privacy.rs b/src/test/ui/const-generics/generic_const_exprs/eval-privacy.rs
new file mode 100644
index 000000000..8023b998a
--- /dev/null
+++ b/src/test/ui/const-generics/generic_const_exprs/eval-privacy.rs
@@ -0,0 +1,26 @@
+#![crate_type = "lib"]
+#![feature(generic_const_exprs)]
+#![allow(incomplete_features)]
+
+pub struct Const<const U: u8>;
+
+pub trait Trait {
+    type AssocTy;
+    fn assoc_fn() -> Self::AssocTy;
+}
+
+impl<const U: u8> Trait for Const<U> // OK, trait impl predicates
+where
+    Const<{ my_const_fn(U) }>: ,
+{
+    type AssocTy = Const<{ my_const_fn(U) }>;
+    //~^ ERROR private type
+    fn assoc_fn() -> Self::AssocTy {
+        Const
+    }
+}
+
+const fn my_const_fn(val: u8) -> u8 {
+    // body of this function doesn't matter
+    val
+}