1 files changed, 17 insertions, 0 deletions
diff --git a/tests/ui/enum-discriminant/issue-70453-generics-in-discr-ice.rs b/tests/ui/enum-discriminant/issue-70453-generics-in-discr-ice.rs
new file mode 100644
index 000000000..a0fb788a5
--- /dev/null
+++ b/tests/ui/enum-discriminant/issue-70453-generics-in-discr-ice.rs
@@ -0,0 +1,17 @@
+#![feature(core_intrinsics)]
+
+extern crate core;
+use core::intrinsics::discriminant_value;
+
+#[repr(usize)]
+enum MyWeirdOption<T> {
+//~^ ERROR parameter `T` is never used
+    None = 0,
+    Some = std::mem::size_of::<T>(),
+    //~^ ERROR generic parameters may not be used in const operations
+}
+
+fn main() {
+    assert_eq!(discriminant_value(&MyWeirdOption::<u8>::None), 0);
+    assert_eq!(discriminant_value(&MyWeirdOption::<u8>::Some), 1);
+}