SIGSEGV on running regression tests with LuaJIT

[ligurio]

sergeyb@pony:~/sources/molly$ LUA_PATH="?/init.lua;./?.lua;/home/sergeyb/.luarocks/share/lua/5.1/?.lua;/home/sergeyb/.luarocks/share/lua/5.1/?/init.lua;
/usr/local/share/lua/5.1/?.lua;/usr/local/share/lua/5.1/?/init.lua" LUA_CPATH="/home/sergeyb/.luarocks/lib/lua/5.1/?.so;/usr/local/lib/lua/5.1/?.so" gdb /usr/bin/luajit test/tests.lua                                             
GNU gdb (Ubuntu 9.2-0ubuntu1~20.04.1) 9.2                                                                                                               
...
(gdb) run test/tests.lua
...
Program received signal SIGSEGV, Segmentation fault.
0x00007ffff7fc0540 in ?? ()
(gdb) bt
#0  0x00007ffff7fc0540 in ?? ()
#1  0x00005555555b52f7 in lj_BC_FUNCC () at buildvm_x86.dasc:809
#2  0x0000555555567a4a in gc_call_finalizer (g=g@entry=0x400003b8, L=L@entry=0x40000378, o=o@entry=0x4002e6e8, mo=<optimized out>) at lj_gc.c:475
#3  0x0000555555587ff6 in gc_finalize (L=L@entry=0x40000378) at lj_gc.c:521
#4  0x0000555555588158 in lj_gc_finalize_udata (L=<optimized out>) at lj_gc.c:528
#5  cpfinalize (L=0x40000378, dummy=<optimized out>, ud=<optimized out>) at lj_state.c:236
#6  0x00005555555b5666 in lj_vm_cpcall () at buildvm_x86.dasc:1179
#7  0x00005555555aa86e in lua_close (L=0x40000378) at lj_state.c:262
#8  0x000055555555b68e in main (argc=2, argv=<optimized out>) at luajit.c:580
(gdb) 

LuaJIT 2.1.0-beta3 -- Copyright (C) 2005-2017 Mike Pall. http://luajit.org/

[ligurio]

Short reproducer:

-- $ luarocks install --local lunitx 0.8-1
-- $ luarocks install --local lua-cjson 2.1.0.6-1
-- $ LUA_PATH=$(luarocks path --lr-path) LUA_CPATH=$(luarocks path --lr-cpath) luajit mini.lua
--
-- LUA_PATH="?/init.lua;./?.lua;/home/sergeyb/.luarocks/share/lua/5.1/?.lua;/home/sergeyb/.luarocks/share/lua/5.1/?/init.lua;/usr/local/share/lua/5.1/?.lua;/usr/local/share/lua/5.1/?/init.lua" LUA_CPATH="/home/sergeyb/.luarocks/lib/lua/5.1/?.so;/usr/local/lib/lua/5.1/?.so" /usr/bin/luajit mini.lua

local lunit = require('lunitx')
local json = require('cjson')

local history_suite = lunit.module('history', 'seeall')
function history_suite.test_to_json()
    local a = json.encode({})
end

[ligurio]

LuaJIT issue is WONTFIX, see LuaJIT#961.