error[E0369]: cannot multiply `&T` by `f64`
  --> $DIR/resolution-in-overloaded-op.rs:8:7
   |
LL |     a * b
   |     - ^ - f64
   |     |
   |     &T
   |
help: consider introducing a `where` clause, but there might be an alternative better way to express this requirement
   |
LL | fn foo<T: MyMul<f64, f64>>(a: &T, b: f64) -> f64 where &T: Mul<f64, Output = f64> {
   |                                                  ++++++++++++++++++++++++++++++++

error: aborting due to 1 previous error

For more information about this error, try `rustc --explain E0369`.