error: index out of bounds: the len is 1 but the index is 1
  --> $DIR/issue-54348.rs:3:5
   |
LL |     [1][1.5 as usize];
   |     ^^^^^^^^^^^^^^^^^
   |
   = note: `#[deny(const_err)]` on by default

error: index out of bounds: the len is 1 but the index is 1
  --> $DIR/issue-54348.rs:4:5
   |
LL |     [1][1u64 as usize];
   |     ^^^^^^^^^^^^^^^^^^

error: aborting due to 2 previous errors