LuaJIT

Issues somebody may already be working on are listed last. List everything by date

• Parser: nested ?: conditionals bypass LJ_MAX_XLEVEL and overflow the C stack

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  Difficulty 2/5 1-3 hours Newbie friendliness 74/100

  LuaJIT/LuaJIT#1542 · Opened Nov 5, 2026

• JIT/FFI: negative signed integer-to-pointer casts are zero-extended on x64

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  Difficulty 4/5 3-5 days Newbie friendliness 35/100

  LuaJIT/LuaJIT#1541 · 1 comment · Opened Nov 4, 2026

• Intel APX (Advanced Performance Extensions)

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  3.0 enhancement

  Difficulty 5/5 Over a week Newbie friendliness 12/100

  LuaJIT/LuaJIT#1515 · 2 comments · Opened Sep 7, 2026

• Incorrect result for the multiplication of 0 and negative numbers in DUALNUM mode.

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  Difficulty 5/5 Over a week Newbie friendliness 18/100

  LuaJIT/LuaJIT#1511 · 1 comment · Opened Aug 18, 2026

• lj_opt_narrow moves an unguarded num->int conversion inside an ADD/SUB

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  Difficulty 4/5 3-5 days Newbie friendliness 30/100

  LuaJIT/LuaJIT#1505 · 2 comments · Opened Aug 11, 2026

• LuaJIT 3.0 Syntax Extensions

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  3.0 documentation enhancement

  Difficulty 5/5 Over a week Newbie friendliness 5/100

  LuaJIT/LuaJIT#1475 · 188 comments · 64 reactions · Opened Jun 22, 2026

• Update ffi to handle 64-bit enums and bit fields

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  3.0 enhancement FFI

  Difficulty 4/5 3-5 days Newbie friendliness 35/100

  LuaJIT/LuaJIT#1461 · 1 comment · Opened May 16, 2026

• VM instrumentation for third-party tools

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  2.1 3.0 enhancement

  Difficulty 5/5 Over a week Newbie friendliness 12/100

  LuaJIT/LuaJIT#1457 · 23 comments · 2 reactions · Opened May 12, 2026

• Wrong result when comparing int64_t and lua number

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  3.0 enhancement

  Difficulty 4/5 3-5 days Newbie friendliness 15/100

  LuaJIT/LuaJIT#1389 · 6 comments · Opened Oct 6, 2025

• Drawback of dropping the rehashing of the finalizer table

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  Difficulty 5/5 Over a week Newbie friendliness 12/100

  LuaJIT/LuaJIT#1350 · 4 reactions · Opened Mar 17, 2025

• Use addreturn in the repl?

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  3.0 enhancement

  Difficulty 2/5 1-3 hours Newbie friendliness 50/100

  LuaJIT/LuaJIT#1337 · 2 comments · 1 reaction · Opened Jan 28, 2025

• Possible crash on early OOM depending on C compiler

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  Difficulty 4/5 3-5 days Newbie friendliness 15/100

  LuaJIT/LuaJIT#1311 · 3 reactions · Opened Dec 2, 2024

• Incorrect narrowing for huge numbers.

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  Difficulty 4/5 3-5 days Newbie friendliness 18/100

  LuaJIT/LuaJIT#1236 · 1 comment · 1 reaction · Opened Jun 29, 2024

• FFI and GC anchors

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  documentation enhancement FFI

  Difficulty 5/5 Over a week Newbie friendliness 8/100

  LuaJIT/LuaJIT#1167 · 19 comments · Opened Feb 27, 2024

• luajit default allocator does not respect alignment requirements in all cases

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  Difficulty 4/5 3-5 days Newbie friendliness 25/100

  LuaJIT/LuaJIT#1161 · 6 comments · Opened Feb 12, 2024

• IRSLOAD_READONLY of FORL_STEP slot can leak to other slots

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  Difficulty 5/5 Over a week Newbie friendliness 12/100

  LuaJIT/LuaJIT#1123 · 1 comment · Opened Nov 17, 2023

• DUALNUM: IRSLOAD_TYPECHECK elision in rec_for_loop needs to be slightly more conservative

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  Difficulty 4/5 3-5 days Newbie friendliness 18/100

  LuaJIT/LuaJIT#1122 · 1 comment · Opened Nov 17, 2023

• v3.0 Tracking Issue

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  3.0

  Difficulty 5/5 Over a week Newbie friendliness 3/100

  LuaJIT/LuaJIT#1092 · Opened Sep 21, 2023

• X64 widening elimination can interact badly with CSE

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  Difficulty 4/5 3-5 days Newbie friendliness 15/100

  LuaJIT/LuaJIT#1086 · 3 comments · Opened Sep 18, 2023

• Plans for PowerPC Little Endian ppc64le support

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  Difficulty 5/5 Over a week Newbie friendliness 8/100

  LuaJIT/LuaJIT#633 · 1 comment · 6 reactions · Opened Nov 5, 2020

• Add support for RISC-V

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  3.0 new port

  Difficulty 5/5 Over a week Newbie friendliness 8/100

  LuaJIT/LuaJIT#628 · 30 comments · 39 reactions · Opened Oct 19, 2020

• Fix table bump optimization

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  3.0 enhancement

  Difficulty 5/5 Over a week Newbie friendliness 12/100

  LuaJIT/LuaJIT#606 · 4 comments · Opened Jul 31, 2020

• table.insert does not call the __len metamethod

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  enhancement

  Difficulty 3/5 1-2 days Newbie friendliness 35/100

  LuaJIT/LuaJIT#578 · 3 comments · Opened Apr 25, 2020

• Port for s390x

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  Difficulty 5/5 Over a week Newbie friendliness 12/100

  LuaJIT/LuaJIT#397 · 3 comments · 1 reaction · Opened Feb 20, 2018

• Trace stitching bails on calls to blacklisted functions

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  enhancement

  Difficulty 5/5 Over a week Newbie friendliness 8/100

  LuaJIT/LuaJIT#318 · 2 comments · Opened Apr 4, 2017

• FFI: Enum cdata tostring should include enum name

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  enhancement FFI low priority

  Difficulty 3/5 1-2 days Newbie friendliness 45/100

  LuaJIT/LuaJIT#135 · Opened Feb 29, 2016

• Merge PPC64 LE Linux !LJ_GC64 interpreter and JIT into LuaJIT repository

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  Difficulty 5/5 Over a week Newbie friendliness 8/100

  LuaJIT/LuaJIT#134 · Opened Feb 25, 2016

• Cleanup of LuaJIT test suite

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  help wanted

  Difficulty 5/5 Over a week Newbie friendliness 12/100

  LuaJIT/LuaJIT#129 · 3 comments · Opened Jan 31, 2016

• Automated regression testing

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  Difficulty 5/5 Over a week Newbie friendliness 12/100

  LuaJIT/LuaJIT#86 · 7 comments · 3 reactions · Opened Oct 1, 2015

• FFI: Add ffi.complex module for complex numbers

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  enhancement FFI low priority

  Difficulty 5/5 Over a week Newbie friendliness 12/100

  LuaJIT/LuaJIT#58 · 1 comment · 1 reaction · Opened Aug 20, 2015

• FFI: Compile calls to C functions with aggregates passed or returned by value

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  3.0 difficult enhancement FFI

  Difficulty 5/5 Over a week Newbie friendliness 10/100

  LuaJIT/LuaJIT#57 · 1 reaction · Opened Aug 20, 2015

• Clone Mike Pall

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  difficult enhancement

  Difficulty 5/5 Over a week Newbie friendliness 5/100

  LuaJIT/LuaJIT#45 · 25 comments · 119 reactions · Opened Aug 18, 2015

• Add s390x port

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  new port

  Difficulty 5/5 Over a week Newbie friendliness 8/100

  LuaJIT/LuaJIT#43 · 9 comments · Opened Aug 18, 2015

• FFI: Add vector/SIMD operations

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  difficult enhancement FFI low priority

  Difficulty 5/5 Over a week Newbie friendliness 8/100

  LuaJIT/LuaJIT#40 · 2 comments · 2 reactions · Opened Aug 18, 2015

• FFI: Add user-definable intrinsics

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  enhancement FFI low priority

  Difficulty 5/5 Over a week Newbie friendliness 8/100

  LuaJIT/LuaJIT#39 · 2 comments · 2 reactions · Opened Aug 18, 2015

• New Garbage Collector

  May be free again A pull request for this issue was closed without being merged. Open

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  3.0 difficult enhancement

  Difficulty 5/5 Over a week Newbie friendliness 5/100

  LuaJIT/LuaJIT#38 · 20 comments · 20 reactions · Opened Aug 18, 2015

• Add Value-Range Propagation (VRP)

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  enhancement low priority

  Difficulty 5/5 Over a week Newbie friendliness 12/100

  LuaJIT/LuaJIT#36 · Opened Aug 18, 2015

• FFI: Redesign handling of float type

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  difficult enhancement FFI low priority

  Difficulty 5/5 Over a week Newbie friendliness 12/100

  LuaJIT/LuaJIT#32 · 1 reaction · Opened Aug 18, 2015

• FFI: Redesign handling of uint32_t

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  difficult enhancement FFI

  Difficulty 5/5 Over a week Newbie friendliness 8/100

  LuaJIT/LuaJIT#31 · 2 comments · Opened Aug 18, 2015

• FFI: Handle all constant declarations

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  3.0 enhancement FFI

  Difficulty 4/5 Over a week Newbie friendliness 22/100

  LuaJIT/LuaJIT#29 · Opened Aug 18, 2015

• FFI: Correctly handle redeclarations

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  3.0 enhancement FFI

  Difficulty 4/5 3-5 days Newbie friendliness 18/100

  LuaJIT/LuaJIT#28 · 7 comments · 1 reaction · Opened Aug 18, 2015

• FFI: Add internal pre-processor

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  3.0 enhancement FFI

  Difficulty 5/5 Over a week Newbie friendliness 12/100

  LuaJIT/LuaJIT#27 · 5 comments · Opened Aug 18, 2015

• Replace package.* library with pure Lua code

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  3.0 cleanup

  Difficulty 5/5 Over a week Newbie friendliness 8/100

  LuaJIT/LuaJIT#22 · 1 comment · Opened Aug 18, 2015

• FFI: Initialize nested structs/unions

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  difficult enhancement FFI

  Difficulty 5/5 Over a week Newbie friendliness 15/100

  LuaJIT/LuaJIT#20 · Opened Aug 18, 2015

• Better integration of FFI number types

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  difficult enhancement FFI low priority

  Difficulty 5/5 Over a week Newbie friendliness 8/100

  LuaJIT/LuaJIT#17 · 1 comment · Opened Aug 18, 2015

• Replace more builtins with bytecode

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  3.0 cleanup enhancement help wanted

  Difficulty 5/5 Over a week Newbie friendliness 8/100

  LuaJIT/LuaJIT#15 · 8 comments · Opened Aug 18, 2015

• Tune loop unrolling heuristics

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  difficult enhancement

  Difficulty 5/5 Over a week Newbie friendliness 8/100

  LuaJIT/LuaJIT#11 · 1 comment · Opened Aug 18, 2015

• Reorganize simple builtins

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  3.0 enhancement

  Difficulty 5/5 Over a week Newbie friendliness 15/100

  LuaJIT/LuaJIT#10 · 1 comment · Opened Aug 18, 2015

• Stores to dead, unused objects prevent allocation sinking

  Possibly taken @XmiliaH claimed this 2130 days ago. Open

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  3.0 enhancement

  Difficulty 5/5 Over a week Newbie friendliness 6/100

  LuaJIT/LuaJIT#651 · Opened Dec 29, 2020

• Enable / implement PPC64 LE Linux !LJ_GC64 interpreter and JIT

  Possibly taken A pull request linked to this issue is open or already merged. Open

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  new port

  Difficulty 5/5 Over a week Newbie friendliness 8/100

  LuaJIT/LuaJIT#42 · 36 comments · 2 reactions · Opened Aug 18, 2015