1 files changed, 16 insertions, 0 deletions
diff --git a/tests/ui/enum-discriminant/issue-70453-polymorphic-ctfe.rs b/tests/ui/enum-discriminant/issue-70453-polymorphic-ctfe.rs
new file mode 100644
index 000000000..42a062239
--- /dev/null
+++ b/tests/ui/enum-discriminant/issue-70453-polymorphic-ctfe.rs
@@ -0,0 +1,16 @@
+#![feature(core_intrinsics)]
+
+extern crate core;
+use core::intrinsics::discriminant_value;
+
+#[repr(usize)]
+enum MyWeirdOption<T> {
+    None = 0,
+    Some(T) = core::mem::size_of::<*mut T>(),
+    //~^ ERROR generic parameters may not be used
+}
+
+fn main() {
+    assert_eq!(discriminant_value(&MyWeirdOption::<()>::None), 0);
+    assert_eq!(discriminant_value(&MyWeirdOption::Some(())), core::mem::size_of::<usize>());
+}