Potential kernel problem
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Description
Hi Folks
I'm trying to get familiar with the Lean proof assistant.
https://github.com/perlindgren/lean_vips/tree/kernel-err
(so the kernel-err branch)
theorem prog_sum
The proof errors out with:
(kernel) application type mismatch
Eq.trans
(congrArg (fun x => x.snd + 4#32 &&& 4026531840#32 ||| 12#32)
...
I tried with 4.18. 4.19. 4.20.0-rc2 and .rc5, under Manjaro x86, and additionally 4.20.0-rc5, under Macos (aarch64 Macbook-pro M4), same problem.
Best regards
Per
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 with the kernel-err branch and LeanVips/Basic.lean at the linked theorem prog_sum around line 131, then reproduce the reported kernel application type mismatch on a supported Lean version. Compare the behavior across the versions and platforms mentioned; done means establishing a minimal, confirmed kernel issue or documenting why the proof failure is expected.
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
- Mostly clear
- Newbie friendliness
- 30/100