error[E0308]: `if` and `else` have incompatible types
  --> $DIR/if-branch-types.rs:2:38
   |
LL |     let x = if true { 10i32 } else { 10u32 };
   |                       -----          ^^^^^ expected `i32`, found `u32`
   |                       |
   |                       expected because of this

error: aborting due to previous error

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