leanprover-community / leanprover-community/mathlib4
`pp.unicode.fun=true` is not turned on during tests
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Description
We run tests using lake env lean test/X.lean, but apparently this does not pick up
def moreServerArgs := #[
"-Dpp.unicode.fun=true", -- pretty-prints `fun a ↦ b`
"-DrelaxedAutoImplicit=false"
]
from the lakefile.
This complicates testing outputs that involve lambdas.
(Workaround: put set_option pp.unicode.fun in the relevant test files.)
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 in the lakefile at moreServerArgs and compare how lake env lean test/X.lean invokes Lean with the test files. Check why pp.unicode.fun=true is not applied, then verify that lambda-related test output uses Unicode without adding set_option pp.unicode.fun to individual test files.
Written by the indexing model from the issue text.
Assessment
- Domain
- build-system, testing-qa
- Issue type
- Bug
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 45/100