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Pull requests list

chore: missing annotations changelog-no Do not include this PR in the release changelog toolchain-available A toolchain is available for this PR, at leanprover/lean4-pr-releases:pr-release-NNNN
#12368 opened Feb 6, 2026 by leodemoura Loading…
2
perf: add a second elim dead vars pass toolchain-available A toolchain is available for this PR, at leanprover/lean4-pr-releases:pr-release-NNNN
#12367 opened Feb 6, 2026 by hargoniX • Draft
4
feat: vector iterator builds-manual CI has verified that the Lean Language Reference builds against this PR builds-mathlib CI has verified that Mathlib builds against this PR changelog-library Library mathlib4-nightly-available A branch for this PR exists at leanprover-community/mathlib4-nightly-testing:lean-pr-testing-NNNN toolchain-available A toolchain is available for this PR, at leanprover/lean4-pr-releases:pr-release-NNNN
#12363 opened Feb 6, 2026 by datokrat • Draft
2
fix: handling of ite/dite expressions in cbv tactic changelog-tactics User facing tactics toolchain-available A toolchain is available for this PR, at leanprover/lean4-pr-releases:pr-release-NNNN
#12361 opened Feb 6, 2026 by wkrozowski • Draft
2
feat: verification of string patterns toolchain-available A toolchain is available for this PR, at leanprover/lean4-pr-releases:pr-release-NNNN
#12360 opened Feb 6, 2026 by TwoFX • Draft
2
feat: prove xs.extract start stop = (xs.take stop).drop start for lists builds-manual CI has verified that the Lean Language Reference builds against this PR builds-mathlib CI has verified that Mathlib builds against this PR changelog-library Library mathlib4-nightly-available A branch for this PR exists at leanprover-community/mathlib4-nightly-testing:lean-pr-testing-NNNN toolchain-available A toolchain is available for this PR, at leanprover/lean4-pr-releases:pr-release-NNNN
#12359 opened Feb 6, 2026 by datokrat Loading…
3
chore: refactor let and match elaborator to be used from the do elaborator toolchain-available A toolchain is available for this PR, at leanprover/lean4-pr-releases:pr-release-NNNN
#12354 opened Feb 6, 2026 by sgraf812 Loading…
4
feat: upstream slice API improvements from human-eval-lean toolchain-available A toolchain is available for this PR, at leanprover/lean4-pr-releases:pr-release-NNNN
#12352 opened Feb 6, 2026 by datokrat • Draft
2
feat: shake: track [csimp] uses changelog-other toolchain-available A toolchain is available for this PR, at leanprover/lean4-pr-releases:pr-release-NNNN
#12351 opened Feb 6, 2026 by Kha Loading…
2
feat: some unification hints breaks-mathlib This is not necessarily a blocker for merging: but there needs to be a plan builds-manual CI has verified that the Lean Language Reference builds against this PR changelog-library Library fast-ci Forces the use of large runners so that e.g. PR releases are created faster mathlib4-nightly-available A branch for this PR exists at leanprover-community/mathlib4-nightly-testing:lean-pr-testing-NNNN toolchain-available A toolchain is available for this PR, at leanprover/lean4-pr-releases:pr-release-NNNN
#12341 opened Feb 6, 2026 by leodemoura Loading…
2
fix: use target type's instances in delta deriving builds-manual CI has verified that the Lean Language Reference builds against this PR builds-mathlib CI has verified that Mathlib builds against this PR mathlib4-nightly-available A branch for this PR exists at leanprover-community/mathlib4-nightly-testing:lean-pr-testing-NNNN toolchain-available A toolchain is available for this PR, at leanprover/lean4-pr-releases:pr-release-NNNN
#12339 opened Feb 6, 2026 by kim-em • Draft
2
fix: remove iff True from array lemmas changelog-library Library toolchain-available A toolchain is available for this PR, at leanprover/lean4-pr-releases:pr-release-NNNN
#12330 opened Feb 5, 2026 by jt0202 Loading…
3
feat: move instance-class check to declaration site breaks-mathlib This is not necessarily a blocker for merging: but there needs to be a plan builds-manual CI has verified that the Lean Language Reference builds against this PR mathlib4-nightly-available A branch for this PR exists at leanprover-community/mathlib4-nightly-testing:lean-pr-testing-NNNN merge-ci Enable merge queue CI checks for PR. In particular, produce artifacts for all major platforms. toolchain-available A toolchain is available for this PR, at leanprover/lean4-pr-releases:pr-release-NNNN
#12325 opened Feb 5, 2026 by Kha • Draft
4
fix: avoid unaligned pointer dereference changelog-library Library toolchain-available A toolchain is available for this PR, at leanprover/lean4-pr-releases:pr-release-NNNN
#12318 opened Feb 5, 2026 by eric-wieser Loading…
1
10
feat: make try? find induction proofs for forall-quantified goals toolchain-available A toolchain is available for this PR, at leanprover/lean4-pr-releases:pr-release-NNNN
#12316 opened Feb 4, 2026 by kim-em • Draft
feat: language server adaptions for multi-version workspaces toolchain-available A toolchain is available for this PR, at leanprover/lean4-pr-releases:pr-release-NNNN
#12310 opened Feb 4, 2026 by mhuisi • Draft
chore: CI: avoid fetching full repo in PR Release toolchain-available A toolchain is available for this PR, at leanprover/lean4-pr-releases:pr-release-NNNN
#12309 opened Feb 4, 2026 by Kha Loading…
feat: instances should always be non-recursive awaiting-mathlib We should not merge this until we have a successful Mathlib build fast-ci Forces the use of large runners so that e.g. PR releases are created faster mathlib4-nightly-available A branch for this PR exists at leanprover-community/mathlib4-nightly-testing:lean-pr-testing-NNNN merge-ci Enable merge queue CI checks for PR. In particular, produce artifacts for all major platforms. toolchain-available A toolchain is available for this PR, at leanprover/lean4-pr-releases:pr-release-NNNN
#12307 opened Feb 4, 2026 by Kha • Draft
2
chore: do not rely on Name.lt for ordering fvars in acLt builds-mathlib CI has verified that Mathlib builds against this PR fast-ci Forces the use of large runners so that e.g. PR releases are created faster mathlib4-nightly-available A branch for this PR exists at leanprover-community/mathlib4-nightly-testing:lean-pr-testing-NNNN toolchain-available A toolchain is available for this PR, at leanprover/lean4-pr-releases:pr-release-NNNN
#12306 opened Feb 4, 2026 by Kha • Draft
2
refactor: eliminate simp +instances uses related to iterators/ranges/slices toolchain-available A toolchain is available for this PR, at leanprover/lean4-pr-releases:pr-release-NNNN
#12304 opened Feb 4, 2026 by datokrat • Draft
3
perf: experiment: separate defeq/whnf kernel diagnostics toolchain-available A toolchain is available for this PR, at leanprover/lean4-pr-releases:pr-release-NNNN
#12303 opened Feb 4, 2026 by nomeata • Draft
5
feat: lake: disabling the artifact cache also disables fetching changelog-lake Lake mathlib4-nightly-available A branch for this PR exists at leanprover-community/mathlib4-nightly-testing:lean-pr-testing-NNNN toolchain-available A toolchain is available for this PR, at leanprover/lean4-pr-releases:pr-release-NNNN
#12300 opened Feb 4, 2026 by tydeu • Draft
1
feat: add cbv_eval attribute changelog-tactics User facing tactics toolchain-available A toolchain is available for this PR, at leanprover/lean4-pr-releases:pr-release-NNNN
#12296 opened Feb 3, 2026 by wkrozowski • Draft
15
fix: type class resolution cache changelog-language Language features and metaprograms toolchain-available A toolchain is available for this PR, at leanprover/lean4-pr-releases:pr-release-NNNN
#12286 opened Feb 3, 2026 by leodemoura Loading…
14
fix: IO.FS.removeFile should delete read-only files on Windows builds-mathlib CI has verified that Mathlib builds against this PR changelog-library Library mathlib4-nightly-available A branch for this PR exists at leanprover-community/mathlib4-nightly-testing:lean-pr-testing-NNNN release-ci Enable all CI checks for a PR, like is done for releases toolchain-available A toolchain is available for this PR, at leanprover/lean4-pr-releases:pr-release-NNNN
#12282 opened Feb 2, 2026 by tydeu Loading…
3
ProTip! What’s not been updated in a month: updated:<2026-01-06.