error[E0252]: the name `autodiff` is defined multiple times
  --> $DIR/visibility.rs:12:5
   |
LL | use std::autodiff::autodiff;
   |     ----------------------- previous import of the macro `autodiff` here
...
LL | use my_macro::autodiff; // bring `autodiff` in scope
   |     ^^^^^^^^^^^^^^^^^^ `autodiff` reimported here
   |
   = note: `autodiff` must be defined only once in the macro namespace of this module
help: you can use `as` to change the binding name of the import
   |
LL | use my_macro::autodiff as other_autodiff; // bring `autodiff` in scope
   |                        +++++++++++++++++

error: this rustc version does not support autodiff
  --> $DIR/visibility.rs:14:1
   |
LL | #[autodiff]
   | ^^^^^^^^^^^

error: aborting due to 2 previous errors

For more information about this error, try `rustc --explain E0252`.