1 files changed, 24 insertions, 0 deletions
diff --git a/src/test/ui/const-generics/defaults/generic-expr-default.rs b/src/test/ui/const-generics/defaults/generic-expr-default.rs
new file mode 100644
index 000000000..8fe43feb7
--- /dev/null
+++ b/src/test/ui/const-generics/defaults/generic-expr-default.rs
@@ -0,0 +1,24 @@
+#![feature(generic_const_exprs)]
+#![allow(incomplete_features)]
+
+pub struct Foo<const N: usize, const M: usize = { N + 1 }>;
+pub fn needs_evaluatable_bound<const N1: usize>() -> Foo<N1> {
+    //~^ error: unconstrained generic constant
+    loop {}
+}
+pub fn has_evaluatable_bound<const N1: usize>() -> Foo<N1> where [(); N1 + 1]: {
+    loop {}
+}
+
+type FooAlias<const N: usize, const NP: usize = { N + 1 }> = [(); NP];
+fn needs_evaluatable_bound_alias<T, const N: usize>() -> FooAlias<N>
+{
+    //~^^ error: unconstrained generic constant
+    todo!()
+}
+fn has_evaluatable_bound_alias<const N: usize>() -> FooAlias<N>
+where [(); N + 1]: {
+    todo!()
+}
+
+fn main() {}