...and wasm tests too

tests/ui/wasm/simd-to-array-80108.rs

@@ -10,6 +10,8 @@ pub struct Vector([i32; 4]);
 
 impl Vector {
     pub const fn to_array(self) -> [i32; 4] {
-        self.0
+        // This used to just be `.0`, but that was banned in
+        // <https://github.com/rust-lang/compiler-team/issues/838>
+        unsafe { std::mem::transmute(self) }
     }
 }