also test with PhantomData

Author: RalfJung

src/test/ui/consts/const-eval/issue-55541.rs

@@ -4,18 +4,24 @@
 
 #![feature(extern_types, const_transmute)]
 
+use std::marker::PhantomData;
+
 extern "C" {
   pub type ExternType;
 }
 unsafe impl Sync for ExternType {}
+static MAGIC_FFI_STATIC: u8 = 42;
 
 #[repr(transparent)]
 pub struct Wrapper(ExternType);
-
-static MAGIC_FFI_STATIC: u8 = 42;
-
 pub static MAGIC_FFI_REF: &'static Wrapper = unsafe {
   std::mem::transmute(&MAGIC_FFI_STATIC)
 };
 
+#[repr(transparent)]
+pub struct Wrapper2(PhantomData<Vec<i32>>, ExternType);
+pub static MAGIC_FFI_REF2: &'static Wrapper2 = unsafe {
+  std::mem::transmute(&MAGIC_FFI_STATIC)
+};
+
 fn main() {}