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Pull requests: leanprover/lean4

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Pull requests list

Rc plus tracing
#12078 opened Jan 21, 2026 by marcelolynch • Draft
doc: document rewrite, rw and rwa according to new guidelines
#12074 opened Jan 20, 2026 by Vierkantor Loading…
perf: more tweaks to injEq generation toolchain-available A toolchain is available for this PR, at leanprover/lean4-pr-releases:pr-release-NNNN
#12073 opened Jan 20, 2026 by nomeata • Draft
12
perf: Nat.testBit builtin no-alloc implementation 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
#12071 opened Jan 20, 2026 by Kha • Draft
4
perf: make Environment.getModuleIdx? constant-time 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
#12068 opened Jan 20, 2026 by Kha • Draft
6
perf: strip unneeded symbols from libleanshared* 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
#12060 opened Jan 20, 2026 by hargoniX Loading…
4
feat: bijection between Char and Fin Char.numCodePoints toolchain-available A toolchain is available for this PR, at leanprover/lean4-pr-releases:pr-release-NNNN WIP This is work in progress, and only a PR for the sake of CI or sharing. No review yet.
#12058 opened Jan 20, 2026 by TwoFX • Draft
2
(draft) patch rc with race fix toolchain-available A toolchain is available for this PR, at leanprover/lean4-pr-releases:pr-release-NNNN
#12054 opened Jan 20, 2026 by marcelolynch Loading…
2
fix: Avoid deadlock by not throttling workers when the task manager is shutting down toolchain-available A toolchain is available for this PR, at leanprover/lean4-pr-releases:pr-release-NNNN
#12052 opened Jan 20, 2026 by marcelolynch Loading…
4
fix: potential deadlock on thread pool shutdown toolchain-available A toolchain is available for this PR, at leanprover/lean4-pr-releases:pr-release-NNNN
#12050 opened Jan 19, 2026 by Kha • Draft
4
test PR for !bench (don't merge) toolchain-available A toolchain is available for this PR, at leanprover/lean4-pr-releases:pr-release-NNNN
#12049 opened Jan 19, 2026 by Garmelon • Draft
4
feat: lazy initialization of closed terms
#12044 opened Jan 19, 2026 by hargoniX • Draft
8
feat: generalize basic Inhabited/Nonempty instances from Monad to Applicative toolchain-available A toolchain is available for this PR, at leanprover/lean4-pr-releases:pr-release-NNNN
#12041 opened Jan 19, 2026 by fgdorais Loading…
1
5
fix: lake: cache blockers for CI integration builds-mathlib CI has verified that Mathlib builds against this PR 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
#12037 opened Jan 18, 2026 by tydeu • Draft
2
feat: link OpenSSL toolchain-available A toolchain is available for this PR, at leanprover/lean4-pr-releases:pr-release-NNNN
#12030 opened Jan 16, 2026 by algebraic-dev • Draft
@algebraic-dev
2
experiment: immediate noncomputable check 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
#12028 opened Jan 16, 2026 by Kha • Draft
2
perf: use static initializers where possible changelog-compiler Compiler, runtime, and FFI
#12023 opened Jan 16, 2026 by hargoniX • Draft
16
perf: link with identical code folding toolchain-available A toolchain is available for this PR, at leanprover/lean4-pr-releases:pr-release-NNNN
#12022 opened Jan 16, 2026 by Kha • Draft
6
feat: add two useful lemmas about Int.ediv 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
#12019 opened Jan 15, 2026 by datokrat Loading…
2
feat: various small list/array/vector API improvements 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
#12017 opened Jan 15, 2026 by datokrat Loading…
5
perf: separate meta and non-meta initializers
#12016 opened Jan 15, 2026 by Kha • Draft
chore: (debug) add tracing to attempt to catch hang 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
#12013 opened Jan 15, 2026 by thorimur • Draft
3
fix: pretty-printing of class abbrev syntax toolchain-available A toolchain is available for this PR, at leanprover/lean4-pr-releases:pr-release-NNNN
#12007 opened Jan 14, 2026 by grunweg • Draft
6
perf: make repeat an elaborator
#12002 opened Jan 14, 2026 by Kha • Draft
2
feat: lemmas about sums of lists/arrays/vectors 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
#11994 opened Jan 13, 2026 by datokrat Loading…
4
ProTip! Updated in the last three days: updated:>2026-01-17.