Sourced from thiserror's releases.

2.0.3

• Support the same Path field being repeated in both Debug and Display representation in error message (#383)
• Improve error message when a format trait used in error message is not implemented by some field (#384)

2.0.2

• Fix hang on invalid input inside #[error(...)] attribute (#382)

2.0.1

• Support errors that contain a dynamically sized final field (#375)
• Improve inference of trait bounds for fields that are interpolated multiple times in an error message (#377)

2.0.0

Breaking changes

• Referencing keyword-named fields by a raw identifier like {r#type} inside a format string is no longer accepted; simply use the unraw name like {type} (#347)

  This aligns thiserror with the standard library's formatting macros, which gained support for implicit argument capture later than the release of this feature in thiserror 1.x.

  #[derive(Error, Debug)]
  #[error("... {type} ...")]  // Before: {r#type}
  pub struct Error {
      pub r#type: Type,
  }

• Trait bounds are no longer inferred on fields whose value is shadowed by an explicit named argument in a format message (#345)

  // Before: impl<T: Octal> Display for Error<T>
  // After: impl<T> Display for Error<T>
  #[derive(Error, Debug)]
  #[error("{thing:o}", thing = "...")]
  pub struct Error<T> {
      thing: T,
  }

• Tuple structs and tuple variants can no longer use numerical {0} {1} access at the same time as supplying extra positional arguments for a format message, as this makes it ambiguous whether the number refers to a tuple field vs a different positional arg (#354)

  #[derive(Error, Debug)]
  #[error("ambiguous: {0} {}", $N)]
  //                  ^^^ Not allowed, use #[error("... {0} {n}", n = $N)]
  pub struct TupleError(i32);

• Code containing invocations of thiserror's derive(Error) must now have a direct dependency on the thiserror crate regardless of the error data structure's contents (#368, #369, #370, #372)

Features

... (truncated)

• 15fd26e Release 2.0.3
• 7046023 Simplify how has_bonus_display is accumulated
• 9cc1d0b Merge pull request #384 from dtolnay/nowrap
• 1d040f3 Use Var wrapper only for Pointer formatting
• 6a6132d Extend no-display ui test to cover another fmt trait
• a061beb Merge pull request #383 from dtolnay/both
• 6388293 Support Display and Debug of same path in error message
• dc0359e Defer binding_value construction
• 520343e Add test of Debug and Display of paths
• 49be39d Release 2.0.2
• Additional commits viewable in compare view

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