Repository Issue Activity (beta)

leanprover/lean4

Current issue state, recent activity, and per-issue timelines from the indexed issue data.

Open Issues
879
New in 7 Days
2
Closed in 7 Days
0
Average Open Age
576 days
Stale 30+ Days
826
Stale 90+ Days
713
Last 2 Weeks
DateOpenedClosedCommentsEventsOpen Backlog
2026-05-2800000
2026-05-271022879
2026-05-2600000
2026-05-2500000
2026-05-2400000
2026-05-2300000
2026-05-2210000
2026-05-2100000
2026-05-2000000
2026-05-1900000
2026-05-1800000
2026-05-1700000
2026-05-1600000
2026-05-1500000
This Week

Opened: 2

Closed: 0

Comments: 2

Events: 2

Top Labels
bug (1377)
P-medium (673)
P-low (428)
RFC (276)
P-high (114)
Lake (107)
enhancement (81)
server (46)
Issue Explorer
IssueAuthorStateLabelsCommentsReactionsUpdated

#13818 RFC: distinguish parser errors and elaboration errors

Opened 6 days ago
b-mehta
open
RFC
341 day ago

#13861 lake lint: support excluding modules from linting

Opened 1 day ago
astefano
open
No labels
001 day ago

#13638 RFC: Redesign of Lean FS API

Opened 24 days ago
algebraic-dev
open
RFC
1219 days ago

#8930 error: Error: tag for constructor 'ast.ZIMOP_MOP_RR' is too big, this is a limitation of the current runtime

Opened 11 months ago
tobiasgrosser
open
bug
P-high
8321 days ago

#8942 RFC: Remove Redundant Deprecation Warnings

Opened 11 months ago
Ivan-Sergeyev
closed - completed
RFC
RFC accepted
P-medium
51521 days ago

#13673 RFC: hover for `fun_induction`

Opened 22 days ago
adomani
closed - completed
RFC
0121 days ago

#11631 `grind` fails where `subst; grind` succeeds

Opened 6 months ago
b-mehta
open
feature
P-medium
2321 days ago

#13581 `set_option diagnostics true` fails with 'Unknown constant' on private `_sparseCasesOn_*` / `match_*` helpers in `module` mode

Opened 29 days ago
kim-em
closed - completed
No labels
1022 days ago

#13355 LCNF ReduceArity should also work for non-fix unused arguments.

Opened 2 months ago
hargoniX
open
bug
code-generator
P-medium
0122 days ago

#13364 Failure to generate equality theorem for matcher

Opened 2 months ago
arthur-adjedj
open
bug
P-low
3022 days ago

#13408 Kernel error for `inferInstanceAs` with let declarations

Opened 1 month ago
Rob23oba
open
bug
P-medium
0022 days ago

#13411 Hover shows resolved type but error shows unresolved metavariable

Opened 1 month ago
math-fehr
open
bug
P-medium
0022 days ago

#13424 `rw` inserts rewritten hypothesis that forward-references fvar

Opened 1 month ago
datokrat
open
bug
P-medium
0022 days ago

#13439 Recursive `unsafe opaque` declarations are not opaque

Opened 1 month ago
Rob23oba
open
bug
P-medium
3022 days ago

#13444 Termination checker error appears on the wrong invocation

Opened 1 month ago
TwoFX
closed - completed
bug
P-medium
2122 days ago

#13465 Strict positivity constraints for inductive behave differently on a type alias

Opened 1 month ago
tribbloid
open
bug
P-low
3022 days ago

#13469 Slow HTTP Server Performance

Opened 1 month ago
algebraic-dev
open
enhancement
nice to have
P-medium
4022 days ago

#13473 The inferred level for structures doesn't always work

Opened 1 month ago
Rob23oba
open
bug
P-low
0022 days ago

#13508 Wrong type in hover on nested `sepBy` antiquotation

Opened 1 month ago
mhuisi
open
bug
P-low
1022 days ago

#13509 Cannot derive functional induction principle for a recursive function: 'still depends on' named pattern matches

Opened 1 month ago
raoxiaojia
open
bug
P-medium
2022 days ago

#13561 `BitVec.ofBoolListLE` stack overflow for large lists

Opened 30 days ago
adomasbaliuka
open
P-low
0022 days ago

#13570 `set_option maxErrors` does not work

Opened 29 days ago
andres-erbsen
open
bug
P-medium
3022 days ago

#13571 Inconsistent behavior in typeclass resolution (local vs top-level instance)

Opened 29 days ago
TWal
open
bug
P-low
0022 days ago

#13632 LCNF simplifier scales super-linearly

Opened 24 days ago
sgraf812
open
bug
code-generator
P-medium
0022 days ago

#13515 Please, provide a way to ensure that given function is panic-free. For example, by making panic opaque

Opened 1 month ago
safinaskar
closed - duplicate
bug
1022 days ago

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