error: unused doc comment
  --> $DIR/unused-doc-comments-for-macros.rs:7:5
   |
LL | /     /// line1
LL | |     /// line2
LL | |     /// line3
   | |_____--------^
   |       |
   |       rustdoc does not generate documentation for macro invocations
   |
   = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
note: the lint level is defined here
  --> $DIR/unused-doc-comments-for-macros.rs:1:9
   |
LL | #![deny(unused_doc_comments)]
   |         ^^^^^^^^^^^^^^^^^^^

error: unused doc comment
  --> $DIR/unused-doc-comments-for-macros.rs:13:5
   |
LL | /     /// line1
LL | |     /// line2
LL | |     /// line3
   | |_____--------^
   |       |
   |       rustdoc does not generate documentation for macro invocations
   |
   = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion

error: aborting due to 2 previous errors