Use core::error::Error for no-std

[antimora]

Pull Request Template

Checklist

• Confirmed that run-checks all script has been executed.

Related Issues/PRs

rust-lang/rust#103765

Changes

Removed feature gate for decorating error types with core::error.

Testing

run all checks.

[laggui]

Awesome! Though it looks like the feature is not stabilized yet

[antimora]

Awesome! Though it looks like the feature is not stabilized yet

I forgot we maintain two last versions. This works only with the latest stable Rust. So we'll have to wait.

[antimora]

Reopened since MSRV is 1.81 now per #2388

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 85.29%. Comparing base (c0e9753) to head (5ac80a5).
Report is 7 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2346   +/-   ##
=======================================
  Coverage   85.29%   85.29%           
=======================================
  Files         792      792           
  Lines      104479   104479           
=======================================
  Hits        89118    89118           
  Misses      15361    15361           

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