compiler/rustc_error_codes/src/error_codes/E0739.md

   1 `#[track_caller]` can not be applied on struct.
   2
   3 Erroneous code example:
   4
   5 ```compile_fail,E0739
   6 #[track_caller]
   7 struct Bar {
   8     a: u8,
   9 }
  10 ```
  11
  12 [RFC 2091]: https://github.com/rust-lang/rfcs/blob/master/text/2091-inline-semantic.md