leanprover-community / leanprover-community/mathlib4
After leanprover/lean4#2734, `norm_cast` often needs an additional `beta_reduce` beforehand.
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Description
All such regressions have been noted with a comment referencing leanprover/lean4#2734.
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by reviewing the regression comments that reference leanprover/lean4#2734 and investigate the affected norm_cast uses involving beta_reduce. Done means the reported regressions no longer require an additional beta_reduce beforehand.
Written by the indexing model from the issue text.
Assessment
- Domain
- compilers
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 25/100