error: expected one of `!` or `::`, found keyword `const`
  --> $DIR/public-instead-of-pub-3.rs:3:12
   |
LL |     public const X: i32 = 123;
   |            ^^^^^ expected one of `!` or `::`
   |
help: write `pub` instead of `public` to make the item public
   |
LL -     public const X: i32 = 123;
LL +     pub const X: i32 = 123;
   |

error: aborting due to 1 previous error