error[E0277]: cannot add `u32` to `i32`
  --> $DIR/ufcs-qpath-self-mismatch.rs:4:6
   |
LL |     <i32 as Add<u32>>::add(1, 2);
   |      ^^^ no implementation for `i32 + u32`
   |
   = help: the trait `Add<u32>` is not implemented for `i32`
   = help: the following other types implement trait `Add<Rhs>`:
             `&i32` implements `Add<i32>`
             `&i32` implements `Add`
             `i32` implements `Add<&i32>`
             `i32` implements `Add`

error[E0308]: mismatched types
  --> $DIR/ufcs-qpath-self-mismatch.rs:7:28
   |
LL |     <i32 as Add<i32>>::add(1u32, 2);
   |     ---------------------- ^^^^ expected `i32`, found `u32`
   |     |
   |     arguments to this function are incorrect
   |
help: the return type of this call is `u32` due to the type of the argument passed
  --> $DIR/ufcs-qpath-self-mismatch.rs:7:5
   |
LL |     <i32 as Add<i32>>::add(1u32, 2);
   |     ^^^^^^^^^^^^^^^^^^^^^^^----^^^^
   |                            |
   |                            this argument influences the return type of `Add`
note: method defined here
  --> $SRC_DIR/core/src/ops/arith.rs:LL:COL
help: change the type of the numeric literal from `u32` to `i32`
   |
LL |     <i32 as Add<i32>>::add(1i32, 2);
   |                             ~~~

error[E0308]: mismatched types
  --> $DIR/ufcs-qpath-self-mismatch.rs:9:31
   |
LL |     <i32 as Add<i32>>::add(1, 2u32);
   |     ----------------------    ^^^^ expected `i32`, found `u32`
   |     |
   |     arguments to this function are incorrect
   |
help: the return type of this call is `u32` due to the type of the argument passed
  --> $DIR/ufcs-qpath-self-mismatch.rs:9:5
   |
LL |     <i32 as Add<i32>>::add(1, 2u32);
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^----^
   |                               |
   |                               this argument influences the return type of `Add`
note: method defined here
  --> $SRC_DIR/core/src/ops/arith.rs:LL:COL
help: change the type of the numeric literal from `u32` to `i32`
   |
LL |     <i32 as Add<i32>>::add(1, 2i32);
   |                                ~~~

error[E0277]: cannot add `u32` to `i32`
  --> $DIR/ufcs-qpath-self-mismatch.rs:4:5
   |
LL |     <i32 as Add<u32>>::add(1, 2);
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ no implementation for `i32 + u32`
   |
   = help: the trait `Add<u32>` is not implemented for `i32`
   = help: the following other types implement trait `Add<Rhs>`:
             `&i32` implements `Add<i32>`
             `&i32` implements `Add`
             `i32` implements `Add<&i32>`
             `i32` implements `Add`

error: aborting due to 4 previous errors

Some errors have detailed explanations: E0277, E0308.
For more information about an error, try `rustc --explain E0277`.