polymorphize: non-promoted unevaluated constants

This commit makes polymorphization visit non-promoted unevaluated
constants rather than visit their substs directly.

Signed-off-by: David Wood <david@davidtw.co>

2 files changed, 33 insertions, 0 deletions

diff --git a/src/test/ui/polymorphization/promoted-function-2.rs b/src/test/ui/polymorphization/promoted-function-2.rs
new file mode 100644
index 00000000000..2831f861f55
--- /dev/null
+++ b/src/test/ui/polymorphization/promoted-function-2.rs
@@ -0,0 +1,16 @@
+// build-fail
+// compile-flags:-Zpolymorphize=on
+#![crate_type = "lib"]
+#![feature(lazy_normalization_consts, rustc_attrs)]
+//~^ WARN the feature `lazy_normalization_consts` is incomplete
+
+#[rustc_polymorphize_error]
+fn test<T>() {
+    //~^ ERROR item has unused generic parameters
+    let x = [0; 3 + 4];
+}
+
+pub fn caller() {
+    test::<String>();
+    test::<Vec<String>>();
+}
diff --git a/src/test/ui/polymorphization/promoted-function-2.stderr b/src/test/ui/polymorphization/promoted-function-2.stderr
new file mode 100644
index 00000000000..38d4808c48c
--- /dev/null
+++ b/src/test/ui/polymorphization/promoted-function-2.stderr
@@ -0,0 +1,17 @@
+warning: the feature `lazy_normalization_consts` is incomplete and may not be safe to use and/or cause compiler crashes
+  --> $DIR/promoted-function-2.rs:4:12
+   |
+LL | #![feature(lazy_normalization_consts, rustc_attrs)]
+   |            ^^^^^^^^^^^^^^^^^^^^^^^^^
+   |
+   = note: `#[warn(incomplete_features)]` on by default
+   = note: see issue #72219 <https://github.com/rust-lang/rust/issues/72219> for more information
+
+error: item has unused generic parameters
+  --> $DIR/promoted-function-2.rs:8:4
+   |
+LL | fn test<T>() {
+   |    ^^^^ - generic parameter `T` is unused
+
+error: aborting due to previous error; 1 warning emitted
+