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XML parser for !DOCTYPE does not handle spaces in PubidLiteral

bugSomething isn't workingSomething isn't working

Status: Open.

#12109 In leanprover/lean4;

· halfaya opened on Jan 22, 2026

Universe normalization is too late to prevent unfolding in defeq check

Status: Open.

#12102 In leanprover/lean4;

· kbuzzard opened on Jan 22, 2026

#eval (- 2 ^ 63 : ISize) / (-1) crashes

bugSomething isn't workingSomething isn't working

Status: Open.

#12097 In leanprover/lean4;

· eric-wieser opened on Jan 21, 2026

Possible deadlock on task manager finalization / shutdown when threads are being throttled by max_std_workers

bugSomething isn't workingSomething isn't working

Status: Open.

#12094 In leanprover/lean4;

· marcelolynch opened on Jan 21, 2026

<code>instance</code> command should reject instances of non-class types

bugSomething isn't workingSomething isn't working

Status: Open.

#12075 In leanprover/lean4;

· NicolasRouquette opened on Jan 20, 2026

RFC: Separate out <code>doc.verso</code> option between module docs and declaration docs

RFCRequest for commentsRequest for comments

Status: Open.

#12070 In leanprover/lean4;

· Vierkantor opened on Jan 20, 2026

Verso docstring appears to ignore header on 0th line

bugSomething isn't workingSomething isn't working

Status: Open.

#12067 In leanprover/lean4;

· Vierkantor opened on Jan 20, 2026

Verso docstrings on <code>where</code>-clause declaration cause errors

bugSomething isn't workingSomething isn't working

Status: Open.

#12066 In leanprover/lean4;

· Vierkantor opened on Jan 20, 2026

Verso docstrings and <code>#guard_msgs</code> cause panic: unexpected context-free info tree node

bugSomething isn't workingSomething isn't working

Status: Open.

#12065 In leanprover/lean4;

· Vierkantor opened on Jan 20, 2026

Verso suggests adding <code>+error</code> to suppress warnings

bugSomething isn't workingSomething isn't working

Status: Open.

#12064 In leanprover/lean4;

· Vierkantor opened on Jan 20, 2026

Verso docstring syntax error messages do not suggest correct fixes

bugSomething isn't workingSomething isn't working

Status: Open.

#12063 In leanprover/lean4;

· Vierkantor opened on Jan 20, 2026

Verso module doc syntax error causes "Unsupported syntax: failed to pretty-print term"

bugSomething isn't workingSomething isn't working

Status: Open.

#12062 In leanprover/lean4;

· Vierkantor opened on Jan 20, 2026