error[E0223]: ambiguous associated type
  --> $DIR/suggest-std-when-using-type.rs:3:14
   |
LL |     let pi = f32::consts::PI;
   |              ^^^^^^^^^^^
   |
help: you are looking for the module in `std`, not the primitive type
   |
LL |     let pi = std::f32::consts::PI;
   |              +++++

error: aborting due to 1 previous error

For more information about this error, try `rustc --explain E0223`.