error[E0753]: expected outer doc comment
  --> $DIR/issue-86781-bad-inner-doc.rs:7:1
   |
LL | //! Inner doc comment
   | ^^^^^^^^^^^^^^^^^^^^^
...
LL | pub struct Foo;
   | --------------- the inner doc comment doesn't annotate this struct
   |
help: to annotate the struct, change the doc comment from inner to outer style
   |
LL | /// Inner doc comment
   |   ~

error: aborting due to 1 previous error

For more information about this error, try `rustc --explain E0753`.