Auto merge of #2337 - RalfJung:rustup, r=RalfJung

rustup

Adds a regression test for https://github.com/rust-lang/rust/issues/96185

rust-version

@@ -1 +1 @@
-41ad4d9b2dbb895666337d162eda52619a6056db
+f342bea9d19f14616c6559312552e6d0ee529cfd

tests/pass/enums.rs

@@ -119,6 +119,18 @@ fn more_discriminant_overflow() {
     }
 }
 
+fn overaligned_casts() {
+    #[allow(dead_code)]
+    #[repr(align(8))]
+    enum Aligned {
+        Zero = 0,
+        One = 1,
+    }
+
+    let aligned = Aligned::Zero;
+    assert_eq!(aligned as u8, 0);
+}
+
 fn main() {
     test(MyEnum::MyEmptyVariant);
     test(MyEnum::MyNewtypeVariant(42));
@@ -127,4 +139,5 @@ fn main() {
 
     discriminant_overflow();
     more_discriminant_overflow();
+    overaligned_casts();
 }