src/test/ui/issues/issue-38715.stderr

   1 error: a macro named `foo` has already been exported
   2   --> $DIR/issue-38715.rs:5:1
   3    |
   4 LL | macro_rules! foo { () => {} }
   5    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `foo` already exported
   6    |
   7    = note: #[deny(duplicate_macro_exports)] on by default
   8    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2018 edition!
   9    = note: for more information, see issue #35896 <https://github.com/rust-lang/rust/issues/35896>
  10 note: previous macro export is now shadowed
  11   --> $DIR/issue-38715.rs:2:1
  12    |
  13 LL | macro_rules! foo { ($i:ident) => {} }
  14    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  15
  16 error: aborting due to previous error
  17