Update Rust crate thiserror to v2

[renovate]

This PR contains the following updates:

Package	Type	Update	New value	References	Sourcegraph
thiserror	dependencies	major	2.0.17	source

Test plan: CI should pass with updated dependencies. No review required: this is an automated dependency update PR.

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Release Notes

dtolnay/thiserror (thiserror)

v2.0.17

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• Use differently named __private module per patch release (#​434)

v2.0.16

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• Add to "no-std" crates.io category (#​429)

v2.0.15

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• Prevent Error::provide API becoming unavailable from a future new compiler lint (#​427)

v2.0.14

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• Allow build-script cleanup failure with NFSv3 output directory to be non-fatal (#​426)

v2.0.13

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• Documentation improvements

v2.0.12

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• Prevent elidable_lifetime_names pedantic clippy lint in generated impl (#​413)

v2.0.11

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• Add feature gate to tests that use std (#​409, #​410, thanks @​Maytha8)

v2.0.10

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• Support errors containing a generic type parameter's associated type in a field (#​408)

v2.0.9

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• Work around missing_inline_in_public_items clippy restriction being triggered in macro-generated code (#​404)

v2.0.8

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• Improve support for macro-generated derive(Error) call sites (#​399)

v2.0.7

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• Work around conflict with #[deny(clippy::allow_attributes)] (#​397, thanks @​zertosh)

v2.0.6

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• Suppress deprecation warning on generated From impls (#​396)

v2.0.5

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• Prevent deprecation warning on generated impl for deprecated type (#​394)

v2.0.4

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• Eliminate needless_lifetimes clippy lint in generated From impls (#​391, thanks @​matt-phylum)

v2.0.3

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• 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)

v2.0.2

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

v2.0.1

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• 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)

v2.0.0

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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

• Support disabling thiserror's standard library dependency by disabling the default "std" Cargo feature: thiserror = { version = "2", default-features = false } (#​373)

• Support using r#source as field name to opt out of a field named "source" being treated as an error's Error::source() (#​350)

  #[derive(Error, Debug)]
  #[error("{source} ==> {destination}")]
  pub struct Error {
      r#source: char,
      destination: char,
  }
  
  let error = Error { source: 'S', destination: 'D' };

• Infinite recursion in a generated Display impl now produces an unconditional_recursion warning (#​359)

  #[derive(Error, Debug)]
  #[error("??? {self}")]
  pub struct Error;

• A new attribute #[error(fmt = path::to::myfmt)] can be used to write formatting logic for an enum variant out-of-line (#​367)

  #[derive(Error, Debug)]
  pub enum Error {
      #[error(fmt = demo_fmt)]
      Demo { code: u16, message: Option<String> },
  }
  
  fn demo_fmt(code: &u16, message: &Option<String>, formatter: &mut fmt::Formatter) -> fmt::Result {
      write!(formatter, "{code}")?;
      if let Some(msg) = message {
          write!(formatter, " - {msg}")?;
      }
      Ok(())
  }

• Enums with an enum-level format message are now able to have individual variants that are transparent to supersede the enum-level message (#​366)

  #[derive(Error, Debug)]
  #[error("my error {0}")]
  pub enum Error {
      Json(#[from] serde_json::Error),
      Yaml(#[from] serde_yaml::Error),
      #[error(transparent)]
      Other(#[from] anyhow::Error),
  }

v1.0.69

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• Backport 2.0.2 fixes

v1.0.68

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• Handle incomplete expressions more robustly in format arguments, such as while code is being typed (#​341, #​344)

v1.0.67

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• Improve expression syntax support inside format arguments (#​335, #​337, #​339, #​340)

v1.0.66

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• Improve compile error on malformed format attribute (#​327)

v1.0.65

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• Ensure OUT_DIR is left with deterministic contents after build script execution (#​325)

v1.0.64

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• Exclude derived impls from coverage instrumentation (#​322, thanks @​oxalica)

v1.0.63

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• Documentation improvements

v1.0.62

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• Support referring to nested tuple struct fields inside #[error("…", …)] attribute (#​309)

v1.0.61

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• Use core::fmt and core::panic to facilitate error_in_core support (#​299, thanks @​jordens)

v1.0.60

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• Resolve unexpected_cfgs warning (#​298)

v1.0.59

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• Unblock testing of rustc debug-fmt-detail option (#​297)

v1.0.58

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• Make backtrace support available when using -Dwarnings (#​292)

v1.0.57

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• Generate more efficient Display impl for error message which do not contain any interpolated value (#​286, thanks @​nyurik)

v1.0.56

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• Update proc-macro2 to fix caching issue when using a rustc-wrapper such as sccache

v1.0.55

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• Work around improperly cached build script result by sccache – second attempt (#​280)

v1.0.54

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• Work around improperly cached build script result by sccache – first attempt (#​279)

v1.0.53

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• Reduce spurious rebuilds under RustRover IDE when using a nightly toolchain (#​270)

v1.0.52

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• Fix interaction with RUSTC_BOOTSTRAP (#​269)

v1.0.51

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• Improve diagnostics when an invalid attribute previously caused thiserror to generate no Error impl (#​266)

v1.0.50

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• Improve diagnostic when a #[source], #[from], or #[transparant] attribute refers to a type that has no std::error::Error impl (#​258, thanks @​de-vri-es)

v1.0.49

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• Access libcore types through ::core in generated code (#​255, thanks @​mina86)

v1.0.48

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• Improve implementation of displaying Path values in a generated Display impl (#​251, thanks @​mina86)

v1.0.47

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• Work around rust-analyzer bug (rust-lang/rust-analyzer#9911)

v1.0.46

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• Add bootstrap workaround to allow rustc to depend on thiserror (#​248, thanks @​RalfJung)

v1.0.45

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• Update backtrace support to nightly's new Error::provide API (rust-lang/rust#113464, #​246)

v1.0.44

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• Documentation improvements

v1.0.43

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v1.0.42

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• Fix compile error in derived Display impl if there was a nonstandard write! macro in scope (#​239)

v1.0.41

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v1.0.40

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• Update syn dependency to 2.x

v1.0.39

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• Set html_root_url attribute

v1.0.38

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• Documentation improvements

v1.0.37

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• Documentation improvements

v1.0.36

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• Documentation improvements (#​195, thanks @​matklad)

v1.0.35

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• More work on integrating std::any::Provider for backtrace support
• Fix "Multiple applicable provide methods in scope" error when the caller has both std::error::Error and std::any::Provide traits in scope (#​185)

v1.0.34

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• Tweak "generic member access" based Backtrace implementation (#​184)

v1.0.33

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• Expose backtraces via the new "generic member access" API on the Error trait (rust-lang/rust#99301, rust-lang/rust#96024)

v1.0.32

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• Add keywords to crates.io metadata

v1.0.31

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• Improve diagnostic when there is an enum variant containing #[from] #[backtrace] Error, Backtrace (#​163)

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