error[E0600]: cannot apply unary operator `-` to type `usize`
  --> $DIR/unsigned-literal-negation.rs:2:13
   |
LL |     let x = -1 as usize;
   |             ^^ cannot apply unary operator `-`
   |
   = note: unsigned values cannot be negated
help: you may have meant the maximum value of `usize`
   |
LL |     let x = usize::MAX;
   |             ~~~~~~~~~~

error[E0600]: cannot apply unary operator `-` to type `usize`
  --> $DIR/unsigned-literal-negation.rs:3:13
   |
LL |     let x = (-1) as usize;
   |             ^^^^ cannot apply unary operator `-`
   |
   = note: unsigned values cannot be negated
help: you may have meant the maximum value of `usize`
   |
LL |     let x = usize::MAX;
   |             ~~~~~~~~~~

error[E0600]: cannot apply unary operator `-` to type `u32`
  --> $DIR/unsigned-literal-negation.rs:4:18
   |
LL |     let x: u32 = -1;
   |                  ^^ cannot apply unary operator `-`
   |
   = note: unsigned values cannot be negated
help: you may have meant the maximum value of `u32`
   |
LL |     let x: u32 = u32::MAX;
   |                  ~~~~~~~~

error: aborting due to 3 previous errors

For more information about this error, try `rustc --explain E0600`.