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nightly releases are failing since 2026-06-11

bugSomething isn't workingSomething isn't working

Status: Open.

#14042 In leanprover/lean4;

· whxvd opened on Jun 14, 2026

solve_by_elim failure

bugSomething isn't workingSomething isn't working

Status: Open.

#14014 In leanprover/lean4;

· BrunoDutertre opened on Jun 11, 2026

lake: specify conflict semantics for require X with <opts> when X is required twice

LakeLake related issueLake related issue

questionFurther information is requestedFurther information is requested

Status: Open.

#14005 In leanprover/lean4;

· kim-em opened on Jun 11, 2026

lake: dump link-args response file on link failure

Status: Open.

#14004 In leanprover/lean4;

· kim-em opened on Jun 11, 2026

IO.Process.run throws an error on non-UTF8 stdout or stderr.

bugSomething isn't workingSomething isn't working

Status: Open.

#14003 In leanprover/lean4;

· mzinkevi opened on Jun 11, 2026

IO.Process.output can throw an error while the underlying spawned process is still running

bugSomething isn't workingSomething isn't working

Status: Open.

#14001 In leanprover/lean4;

· mzinkevi opened on Jun 11, 2026

IO.Process.output hangs on large input strings

bugSomething isn't workingSomething isn't working

Status: Open.

#14000 In leanprover/lean4;

· mzinkevi opened on Jun 10, 2026

lake: module archives are not content-stable, preventing cache deduplication and reuse

Status: Open.

#13996 In leanprover/lean4;

· marcelolynch opened on Jun 10, 2026

RFC: Make Bool.xor a standalone definition with dedicated simp and grind support

Status: Open.

#13994 In leanprover/lean4;

· linesthatinterlace opened on Jun 10, 2026

Lean.Json.parse panics with "Nat.pow exponent is too big" on large exponents

bugSomething isn't workingSomething isn't working

Status: Open.

#13987 In leanprover/lean4;

· hexdrift-ctrl opened on Jun 9, 2026

Decimal Float literals can round incorrectly by 1 ulp

bugSomething isn't workingSomething isn't working

Status: Open.

#13982 In leanprover/lean4;

· hexdrift-ctrl opened on Jun 9, 2026

Declaration ... must be marked as meta error when adding an existing simproc to a custom simp attribute

bugSomething isn't workingSomething isn't working

P-mediumWe may work on this issue if we find the timeWe may work on this issue if we find the time

Status: Open.

#13962 In leanprover/lean4;

· MackieLoeffel opened on Jun 5, 2026