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RFC: specify --packages to lake using an environment variable

RFCRequest for commentsRequest for comments

Status: Open.

#13344 In leanprover/lean4;

· xhalo32 opened on Apr 9, 2026

feat: lake build --summary flag to print build outcome table

changelog-lakeLakeLake

Status: Open.

#13316 In leanprover/lean4;

· kim-em opened on Apr 8, 2026

deriving BEq inside public meta section does not produce a meta instance

Status: Open.

#13313 In leanprover/lean4;

· kim-em opened on Apr 8, 2026

CMakeLists logic misses aarch leantar

bugSomething isn't workingSomething isn't working

Status: Open.

#13306 In leanprover/lean4;

· mattrobball opened on Apr 7, 2026

Parallel tactic combinators leak subtasks on re-elaboration (cancel token not propagated)

Status: Open.

#13300 In leanprover/lean4;

· nomeata opened on Apr 7, 2026

(kernel) declaration has metavariables with postponed field notation

bugSomething isn't workingSomething isn't working

Status: Open.

#13288 In leanprover/lean4;

· Rob23oba opened on Apr 5, 2026

"unused variable" warning for variable used by typclass inference

bugSomething isn't workingSomething isn't working

Status: Open.

#13269 In leanprover/lean4;

· andres-erbsen opened on Apr 3, 2026

named local syntax can only have two name components

bugSomething isn't workingSomething isn't working

Status: Open.

#13268 In leanprover/lean4;

· Rob23oba opened on Apr 3, 2026

kernel error in simple grind proof

bugSomething isn't workingSomething isn't working

Status: Open.

#13265 In leanprover/lean4;

· b-mehta opened on Apr 3, 2026

split fails with let declarations

bugSomething isn't workingSomething isn't working

Status: Open.

#13263 In leanprover/lean4;

· Rob23oba opened on Apr 2, 2026

Inconsistent name resolution with generalized field notation in opened namespaces

bugSomething isn't workingSomething isn't working

Status: Open.

#13261 In leanprover/lean4;

· fiforeach opened on Apr 2, 2026

RFC: Don't shake deprecated modules

RFCRequest for commentsRequest for comments

Status: Open.

#13236 In leanprover/lean4;

· SnirBroshi opened on Apr 1, 2026