error[E0308]: mismatched types
  --> $DIR/issue-117669.rs:2:20
   |
LL |     let abs: i32 = 3i32.checked_abs();
   |              ---   ^^^^^^^^^^^^^^^^^^ expected `i32`, found `Option<i32>`
   |              |
   |              expected due to this
   |
   = note: expected type `i32`
              found enum `Option<i32>`
help: consider using `Option::expect` to unwrap the `Option<i32>` value, panicking if the value is an `Option::None`
   |
LL |     let abs: i32 = 3i32.checked_abs().expect("REASON");
   |                                      +++++++++++++++++

error: aborting due to 1 previous error

For more information about this error, try `rustc --explain E0308`.