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Intervening doc comment with no section headers resets the section header count

bugSomething isn't workingSomething isn't working

Status: Open.

#13485 In leanprover/lean4;

· robsimmons opened on Apr 20, 2026

False positive 'unused variable' in linter

bugSomething isn't workingSomething isn't working

Status: Open.

#13483 In leanprover/lean4;

· lovely-error opened on Apr 20, 2026

The inferred level for structures doesn't always work

bugSomething isn't workingSomething isn't working

Status: Open.

#13473 In leanprover/lean4;

· Rob23oba opened on Apr 19, 2026

Slow HTTP Server Performance

enhancementNew feature or requestNew feature or request

nice to haveCool feature that would be really nice to haveCool feature that would be really nice to have

Status: Open.

Feature

#13469 In leanprover/lean4;

· algebraic-dev opened on Apr 18, 2026

Strict positivity constraints for inductive behave differently on a type alias

bugSomething isn't workingSomething isn't working

Status: Open.

#13465 In leanprover/lean4;

· tribbloid opened on Apr 18, 2026

IO.Process.output duplicates buffered file writes when exec fails

Status: Open.

#13463 In leanprover/lean4;

· kim-em opened on Apr 18, 2026

Incremental build cache can cause incorrect test results

bugSomething isn't workingSomething isn't working

Status: Open.

#13449 In leanprover/lean4;

· robin-aws opened on Apr 17, 2026

Termination checker error appears on the wrong invocation

bugSomething isn't workingSomething isn't working

Status: Open.

#13444 In leanprover/lean4;

· TwoFX opened on Apr 17, 2026

Recursive unsafe opaque declarations are not opaque

bugSomething isn't workingSomething isn't working

Status: Open.

#13439 In leanprover/lean4;

· Rob23oba opened on Apr 17, 2026

Lean.registerBuiltinAttribute with a .beforeElaboration attributes has no effect on structures

bugSomething isn't workingSomething isn't working

Status: Open.

#13433 In leanprover/lean4;

· grunweg opened on Apr 16, 2026

rw inserts rewritten hypothesis that forward-references fvar

bugSomething isn't workingSomething isn't working

Status: Open.

#13424 In leanprover/lean4;

· datokrat opened on Apr 15, 2026

Lake artifact cache: 'missing data file' for non-exported transitive imports via meta import chains

Status: Open.

#13419 In leanprover/lean4;

· nomeata opened on Apr 15, 2026