warning: any use of this value will cause an error
  --> $DIR/assoc_const_generic_impl.rs:11:34
   |
LL |     const I_AM_ZERO_SIZED: ()  = [()][std::mem::size_of::<Self>()];
   |     -----------------------------^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^-
   |                                  |
   |                                  index out of bounds: the len is 1 but the index is 4
   |
note: the lint level is defined here
  --> $DIR/assoc_const_generic_impl.rs:3:9
   |
LL | #![warn(const_err)]
   |         ^^^^^^^^^

error: erroneous constant encountered
  --> $DIR/assoc_const_generic_impl.rs:13:18
   |
LL |         let () = Self::I_AM_ZERO_SIZED;
   |                  ^^^^^^^^^^^^^^^^^^^^^

error: aborting due to previous error; 1 warning emitted