1 files changed, 44 insertions, 0 deletions
diff --git a/src/test/ui/polymorphization/const_parameters/closures.stderr b/src/test/ui/polymorphization/const_parameters/closures.stderr
new file mode 100644
index 000000000..fdf817cae
--- /dev/null
+++ b/src/test/ui/polymorphization/const_parameters/closures.stderr
@@ -0,0 +1,44 @@
+warning: the feature `generic_const_exprs` is incomplete and may not be safe to use and/or cause compiler crashes
+  --> $DIR/closures.rs:3:12
+   |
+LL | #![feature(generic_const_exprs, rustc_attrs)]
+   |            ^^^^^^^^^^^^^^^^^^^
+   |
+   = note: `#[warn(incomplete_features)]` on by default
+   = note: see issue #76560 <https://github.com/rust-lang/rust/issues/76560> for more information
+
+error: item has unused generic parameters
+  --> $DIR/closures.rs:19:19
+   |
+LL | pub fn unused<const T: usize>() -> usize {
+   |               -------------- generic parameter `T` is unused
+LL |
+LL |     let add_one = |x: usize| x + 1;
+   |                   ^^^^^^^^^^
+
+error: item has unused generic parameters
+  --> $DIR/closures.rs:17:8
+   |
+LL | pub fn unused<const T: usize>() -> usize {
+   |        ^^^^^^ -------------- generic parameter `T` is unused
+
+error: item has unused generic parameters
+  --> $DIR/closures.rs:28:19
+   |
+LL | pub fn used_parent<const T: usize>() -> usize {
+   |                    -------------- generic parameter `T` is unused
+LL |     let x: usize = T;
+LL |     let add_one = |x: usize| x + 1;
+   |                   ^^^^^^^^^^
+
+error: item has unused generic parameters
+  --> $DIR/closures.rs:48:13
+   |
+LL | pub fn unused_upvar<const T: usize>() -> usize {
+   |                     -------------- generic parameter `T` is unused
+LL |     let x: usize = T;
+LL |     let y = || x;
+   |             ^^
+
+error: aborting due to 4 previous errors; 1 warning emitted
+