Relax error bound

[SarguelUnda]

This relax the bound on logos Error type for more interoperability with error library like anyhow. I could not see where or if those bounds were mandatory. We still need the default trait for constructor but it is ok to use a manual implementation over a wrapper type like

struct MyAppLexError(anyhow::Error)

It would be harder/misleading to do so for Clone and PartialEq hence the pull request.

[jeertmans]

Hi @SarguelUnda, thanks for your PR!

As you can see, your changes require a increase of the minimal supported Ruest version (MSRV): do you have any idea what is causing this? I guess you can fiund the explaination in the changelog of Rust 1.81? Or maybe is was already broken before, as it seems to be triggered by a dependency we have.

[SarguelUnda]

Hello,

from running the command locally it seems to be the home deps from the afl package from the fuzz local crate that trigger this error.

cargo msrv verify -- cargo check --workspace --features debug:

Compatibility Check #1: Rust 1.74.0
  [FAIL]   Is incompatible

  ╭───────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────╮
  │ error: package `home v0.5.11` cannot be built because it requires rustc 1.81 or newer, while the currently active rustc version is 1.74.0 │
  │ Either upgrade to rustc 1.81 or newer, or use                                                                                             │
  │ cargo update [email protected] --precise ver                                                                                                    │
  │ where `ver` is the latest version of `home` supporting rustc 1.74.0                                                                       │
  │                                                                                                                                           │
  ╰───────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────╯

cargo tree --workspace

logos-fuzz v0.15.0
├── afl v0.15.13
│   ├── libc v0.2.169
│   ├── rustc_version v0.4.1 (*)
│   └── xdg v2.5.2
│   [build-dependencies]
│   └── home v0.5.11
│       └── windows-sys v0.59.0
│           └── windows-targets v0.52.6 (*)
├── arbitrary v1.4.1
└── logos-codegen v0.15.0 (*)

[sokorototo]

This somewhat tracks, as an error type really only needs Debug and Display