error[E0080]: values of the type `[u8; SIZE]` are too big for the current architecture
  --> $SRC_DIR/core/src/mem/mod.rs:LL:COL
   |
LL |     intrinsics::size_of::<T>()
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^ inside `std::mem::size_of::<[u8; SIZE]>` at $SRC_DIR/core/src/mem/mod.rs:LL:COL
   |
  ::: $DIR/issue-55878.rs:7:26
   |
LL |     println!("Size: {}", std::mem::size_of::<[u8; u64::MAX as usize]>());
   |                          ---------------------------------------------- inside `main` at $DIR/issue-55878.rs:7:26

error: erroneous constant used
  --> $DIR/issue-55878.rs:7:26
   |
LL |     println!("Size: {}", std::mem::size_of::<[u8; u64::MAX as usize]>());
   |                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ referenced constant has errors
   |
   = note: `#[deny(const_err)]` on by default
   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
   = note: for more information, see issue #71800 <https://github.com/rust-lang/rust/issues/71800>
   = note: this error originates in the macro `$crate::format_args_nl` (in Nightly builds, run with -Z macro-backtrace for more info)

error: aborting due to 2 previous errors

For more information about this error, try `rustc --explain E0080`.