error: `m` is both a module and a macro
  --> $DIR/bad-link-to-proc-macro.rs:4:15
   |
LL | //! Link to [`m`].
   |               ^ ambiguous link
   |
note: the lint level is defined here
  --> $DIR/bad-link-to-proc-macro.rs:2:9
   |
LL | #![deny(rustdoc::broken_intra_doc_links)]
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
help: to link to the module, prefix with `mod@`
   |
LL | //! Link to [`mod@m`].
   |               ++++
help: to link to the macro, add an exclamation mark
   |
LL | //! Link to [`m!`].
   |                +

error: aborting due to 1 previous error