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Sep 16th, 2019
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  1. #![allow(unreachable_code)]
  2.  
  3.  
  4. fn main() {
  5. println!("{:?}", {
  6. struct Foo { x: i64 }; let foo = Foo { x: 0 }; println!("{}", foo)
  7. });
  8. }
  9.  
  10.  
  11. /* ~~~~=== stderr ===~~~~
  12. Compiling playground v0.0.1 (/playground)
  13. error[E0277]: `main::Foo` doesn't implement `std::fmt::Display`
  14. --> src/main.rs:6:71
  15. |
  16. 6 | struct Foo { x: i64 }; let foo = Foo { x: 0 }; println!("{}", foo)
  17. | ^^^ `main::Foo` cannot be formatted with the default formatter
  18. |
  19. = help: the trait `std::fmt::Display` is not implemented for `main::Foo`
  20. = note: in format strings you may be able to use `{:?}` (or {:#?} for pretty-print) instead
  21. = note: required by `std::fmt::Display::fmt`
  22.  
  23. error: aborting due to previous error
  24.  
  25. For more information about this error, try `rustc --explain E0277`.
  26. error: Could not compile `playground`.
  27.  
  28. To learn more, run the command again with --verbose.
  29.  
  30. */
  31.  
  32. /* ~~~~=== stdout ===~~~~
  33.  
  34. */
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