Lua lanes deadlock in garbage collector

gistfile1.txt

Thread 2 (Thread 0x7f378bf98700 (LWP 30758)):                                                                                                                                                   
#0  0x00007f378bfa503f in pthread_cond_wait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0                                                                                                       
No symbol table info available.                                                                                                                                                                 
#1  0x00007f378c3f9542 in SIGNAL_WAIT (ref=0x10868e0, mu=0x10854b0, abs_secs=-1) at threading.c:554                                                                                             
        rc = 0
        __PRETTY_FUNCTION__ = "SIGNAL_WAIT"
#2  0x00007f378c3f418b in LG_linda_receive (L=0x108b020) at lanes.c:639
        s = 0x10a0760
        prev_status = RUNNING
        K = 0x10854b0
        linda = 0x10868b0
        pushed = 0
        expected_pushed_min = 2
        expected_pushed_max = 2
        cancel = CANCEL_NONE
        keeper_receive = 0x7f378c4000d8 <keepercall_receive>
        timeout = -1
        key_i = 3
#3  0x000000000040a500 in luaD_precall (L=0x108b020, func=0x108b490, nresults=2) at ldo.c:320
        ci = 0x108b2e0
        n = 0
        cl = 0x1099b00
        funcr = 176
#4  0x00000000004184c3 in luaV_execute (L=0x108b020, nexeccalls=1) at lvm.c:591
        b = 5
        nresults = 2
        i = 41992732
        ra = 0x108b490
        cl = 0x10a0140
        base = 0x108b410
        k = 0x109c990
        pc = 0x109c8a8
#5  0x000000000040a7a7 in luaD_call (L=0x108b020, func=0x108b400, nResults=-1) at ldo.c:378
No locals.
#6  0x0000000000406e18 in f_call (L=0x108b020, ud=0x7f378bf97f00) at lapi.c:800
        c = 0x7f378bf97f00
#7  0x0000000000409730 in luaD_rawrunprotected (L=0x108b020, f=0x406de3 <f_call>, ud=0x7f378bf97f00)
    at ldo.c:116
        lj = {previous = 0x0, b = {{__jmpbuf = {139876548314880, -2537068089551786840, 0, 139876571291648, 
                0, 139876548314880, -2537068089652450136, 2496561480379886760}, __mask_was_saved = 0, 
              __saved_mask = {__val = {139876548312576, 139876414521376, 40, 0, 139876571291648, 0, 
                  139876548314880, 139876558068816, 139876571291648, 139876548314880, 139876548312640, 
                  4304406, 40, 0, 0, 0}}}}, status = 0}
#8  0x000000000040aba5 in luaD_pcall (L=0x108b020, func=0x406de3 <f_call>, u=0x7f378bf97f00, old_top=32, 
    ef=16) at ldo.c:464
        status = 0
        oldnCcalls = 0
        old_ci = 0
        old_allowhooks = 1 '\001'
        old_errfunc = 0
#9  0x0000000000406ec9 in lua_pcall (L=0x108b020, nargs=0, nresults=-1, errfunc=1) at lapi.c:821
        c = {func = 0x108b400, nresults = -1}
        status = 0
        func = 16
#10 0x00007f378c3f60df in lane_main (vs=0x10a0760) at lanes.c:1810
        s = 0x10a0760
        rc = 0
        rc2 = 0
        L = 0x108b020
        __PRETTY_FUNCTION__ = "lane_main"
#11 0x00007f378bfa10a2 in start_thread () from /usr/lib/libpthread.so.0
No symbol table info available.
#12 0x00007f378c94f49d in clone () from /usr/lib/libc.so.6
No symbol table info available.

Thread 1 (Thread 0x7f378d53d700 (LWP 30757)):
#0  0x00007f378bfa779c in __lll_lock_wait () from /usr/lib/libpthread.so.0
No symbol table info available.
#1  0x00007f378bfa3467 in _L_lock_531 () from /usr/lib/libpthread.so.0
No symbol table info available.
#2  0x00007f378bfa3290 in pthread_mutex_lock () from /usr/lib/libpthread.so.0
No symbol table info available.
#3  0x00007f378c400d33 in keeper_acquire (ptr=0x10a6b40) at keeper.c:628
        i = 0
        K = 0x10854b0
#4  0x00007f378c3f4aa2 in linda_id (L=0x1069010, which=0x7f378c401ebd "delete") at lanes.c:966
        K = 0x1fbc4b210
        l = 0x10a6b40
#5  0x00007f378c3fb743 in deep_userdata_gc (L=0x1069010) at tools.c:862
        idfunc = 0x7f378c3f4905 <linda_id>
        proxy = 0x10a6bd8
        p = 0x107d6d0
        v = 0
#6  0x000000000040a500 in luaD_precall (L=0x1069010, func=0x10785e0, nresults=0) at ldo.c:320
        ci = 0x1069370
        n = 32767
        cl = 0x1086e40
        funcr = 768
#7  0x000000000040a792 in luaD_call (L=0x1069010, func=0x10785e0, nResults=0) at ldo.c:377
No locals.
#8  0x000000000040d1f2 in GCTM (L=0x1069010) at lgc.c:467
        oldah = 1 '\001'
        oldt = 104304
        g = 0x10690c8
        o = 0x10a6bb0
        udata = 0x10a6bb0
        tm = 0x1086f00
#9  0x000000000040d803 in singlestep (L=0x1069010) at lgc.c:594
        g = 0x10690c8
#10 0x000000000040d8dd in luaC_step (L=0x1069010) at lgc.c:617
        g = 0x10690c8
        lim = 1200
#11 0x00000000004065ff in lua_createtable (L=0x1069010, narray=0, nrec=0) at lapi.c:580
No locals.
#12 0x00007f378c3feeb6 in luaG_inter_copy (L=0x1085670, L2=0x1069010, n=1, mode_=eLM_FromKeeper)
    at tools.c:2114
        top_L = 1
        top_L2 = 3
        i = 4294967295
        j = 1
        tmpBuf = "Z\b\000\000\001\000\000\000\bY\b\001\000\000\000"
        pBuf = 0x7f378c402324 "?"
        copyok = 1
#13 0x00007f378c3ff018 in luaG_inter_move (L=0x1085670, L2=0x1069010, n=1, mode_=eLM_FromKeeper)
    at tools.c:2152
        ret = 0
#14 0x00007f378c400f2c in keeper_call (K=0x1085670, _func=0x7f378c3fff51 <keepercall_send>, L=0x1069010, 
    linda=0x60719f0, starting_index=2) at keeper.c:700
        args = 2
        Ktos = 0
        retvals = 1
#15 0x00007f378c3f3a1e in LG_linda_send (L=0x1069010) at lanes.c:428
        _oldtop_KL = 0
        K = 0x10854b0
        KL = 0x1085670
        linda = 0x60719f0
        ret = 0
        cancel = CANCEL_NONE
        pushed = 17270272
        timeout = -1
        key_i = 2
#16 0x000000000040a500 in luaD_precall (L=0x1069010, func=0x10785a0, nresults=0) at ldo.c:320
        ci = 0x1069348
        n = 1
        cl = 0x1086bf0
        funcr = 704
#17 0x00000000004184c3 in luaV_execute (L=0x1069010, nexeccalls=3) at lvm.c:591
        b = 0
        nresults = 0
        i = 16412
        ra = 0x10785a0
        cl = 0x1e7fc50
        base = 0x10785a0
        k = 0x1071350
        pc = 0x107169c
#18 0x000000000040a7a7 in luaD_call (L=0x1069010, func=0x1069410, nResults=-1) at ldo.c:378
No locals.
#19 0x0000000000406e18 in f_call (L=0x1069010, ud=0x7ffffbc4bbc0) at lapi.c:800
        c = 0x7ffffbc4bbc0
#20 0x0000000000409730 in luaD_rawrunprotected (L=0x1069010, f=0x406de3 <f_call>, ud=0x7ffffbc4bbc0)
    at ldo.c:116
        lj = {previous = 0x7ffffbc4bd90, b = {{__jmpbuf = {0, -2496570376804799320, 4209744, 
                140737417363536, 0, 0, -2496570376771244888, 2496561480379886760}, __mask_was_saved = 0, 
              __saved_mask = {__val = {140737417362096, 139876557779814, 4210053, 2, 
                  0 <repeats 12 times>}}}}, status = 0}
#21 0x000000000040aba5 in luaD_pcall (L=0x1069010, func=0x406de3 <f_call>, u=0x7ffffbc4bbc0, old_top=64, 
    ef=48) at ldo.c:464
        status = 0
        oldnCcalls = 1
        old_ci = 40
        old_allowhooks = 1 '\001'
        old_errfunc = 0
#22 0x0000000000406ec9 in lua_pcall (L=0x1069010, nargs=0, nresults=-1, errfunc=2) at lapi.c:821
        c = {func = 0x1069410, nresults = -1}
        status = 0
        func = 48
#23 0x000000000040406b in docall (L=0x1069010, narg=0, clear=0) at lua.c:102
        status = 0
        base = 2
#24 0x000000000040490e in handle_script (L=0x1069010, argv=0x7ffffbc4c058, n=1) at lua.c:250
        status = 0
        fname = 0x7ffffbc4df44 "tests/linda_perf.lua"
        narg = 0
#25 0x0000000000404e79 in pmain (L=0x1069010) at lua.c:362
        s = 0x7ffffbc4bf50
        argv = 0x7ffffbc4c058
        script = 1
        has_i = 0
        has_v = 0
        has_e = 0
#26 0x000000000040a500 in luaD_precall (L=0x1069010, func=0x10693e0, nresults=0) at ldo.c:320
        ci = 0x10692a8
        n = 0
        cl = 0x106a1a0
        funcr = 16
#27 0x000000000040a792 in luaD_call (L=0x1069010, func=0x10693e0, nResults=0) at ldo.c:377
No locals.
#28 0x0000000000406fdf in f_Ccall (L=0x1069010, ud=0x7ffffbc4bf10) at lapi.c:846
        c = 0x7ffffbc4bf10
        cl = 0x106a1a0
#29 0x0000000000409730 in luaD_rawrunprotected (L=0x1069010, f=0x406f04 <f_Ccall>, ud=0x7ffffbc4bf10)
    at ldo.c:116
        lj = {previous = 0x0, b = {{__jmpbuf = {0, -2496570376918045528, 4209744, 140737417363536, 0, 0, 
                -2496570377018708824, 2496561480379886760}, __mask_was_saved = 0, __saved_mask = {__val = {
                  0, 0, 15950173696781020328, 4209744, 140737417363536, 0, 0, 15950173696680357032, 
                  2496561480379886760, 0, 139874199928956, 139876557561856, 0, 139876561384992, 616, 
                  4209744}}}}, status = 0}
#30 0x000000000040aba5 in luaD_pcall (L=0x1069010, func=0x406f04 <f_Ccall>, u=0x7ffffbc4bf10, old_top=16, 
    ef=0) at ldo.c:464
        status = 0
        oldnCcalls = 0
        old_ci = 0
        old_allowhooks = 1 '\001'
        old_errfunc = 0
#31 0x000000000040703b in lua_cpcall (L=0x1069010, func=0x404d02 <pmain>, ud=0x7ffffbc4bf50) at lapi.c:856
        c = {func = 0x404d02 <pmain>, ud = 0x7ffffbc4bf50}
        status = 0
#32 0x0000000000404f55 in main (argc=2, argv=0x7ffffbc4c058) at lua.c:387
        status = 0
        s = {argc = 2, argv = 0x7ffffbc4c058, status = 0}
        L = 0x1069010