1 files changed, 20 insertions, 0 deletions
diff --git a/tests/ui/const-generics/occurs-check/unused-substs-5.rs b/tests/ui/const-generics/occurs-check/unused-substs-5.rs
new file mode 100644
index 000000000..383ab4cd8
--- /dev/null
+++ b/tests/ui/const-generics/occurs-check/unused-substs-5.rs
@@ -0,0 +1,20 @@
+#![feature(generic_const_exprs)]
+#![allow(incomplete_features)]
+
+// `N + 1` also depends on `T` here even if it doesn't use it.
+fn q<T, const N: usize>(_: T) -> [u8; N + 1] {
+    todo!()
+}
+
+fn supplier<T>() -> T {
+    todo!()
+}
+
+fn catch_me<const N: usize>() where [u8; N + 1]: Default {
+    let mut x = supplier();
+    x = q::<_, N>(x); //~ ERROR mismatched types
+}
+
+fn main() {
+    catch_me::<3>();
+}