Error code E0585
A documentation comment that doesn't document anything was found.
Erroneous code example:
fn main() { // The following doc comment will fail: /// This is a useless doc comment! }
Documentation comments need to be followed by items, including functions, types, modules, etc. Examples:
#![allow(unused)] fn main() { /// I'm documenting the following struct: struct Foo; /// I'm documenting the following function: fn foo() {} }