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zsh 5.0.6 hanged in freejob from TRAPCHLD

I typed:

  ps -aef|gr pulseaudio

and zsh hanged.

gr: aliased to grep -P --color=always

grep: aliased to pager-wrapper grep

pager-wrapper () {
        if [[ -t 1 ]]
        then
                $@ | less -+c -FRX
        else
                $@
        fi
}

TRAPCHLD () {
        [[ -o interactive && -n $TTY ]] && updprompt
}

updprompt () {
        [[ -n $zsh410 && -n $TTY && -n $terminfo ]] && {
                echoti rmacs
                echoti sgr0
                echoti cnorm
        } > $TTY 2> /dev/null
        psvar[2]="" 
        if [[ $domain = local.ay && "$(pmu_battery)" = "Battery" ]]
        then
                psvar[2]="[$(pmu_percent)%]" 
        elif [[ $domain = local.xvii ]]
        then
                local battery="$(acpi -b)"
                [[ $battery = *Discharging* ]] && psvar[2]="[${${battery#*Discharging, }%\%,*}%]" 
        fi
        local njobs jobstr
        njobs=$#jobstates 
        [[ $njobs -gt 1 ]] && jobstr="s" 
        [[ $njobs -ge 1 ]] && jobstr=" $njobs job$jobstr |" 
        [[ -n $TTY && $TERM = (xterm*|dtterm|mlterm|rxvt*|screen*) ]] && {
                [[ $TERM = screen* ]] || print -nP "\e]1;%m:%.\x07"
                print -nP "\e]2;${jobstr}${WINTITLE:+ $WINTITLE |} %n@%m - %~ | %y\x07"
        } > $TTY
}

This zsh instance has no children. The backtrace:

__lll_lock_wait_private ()
    at ../nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:95
95      ../nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S: No such file or directory.
(gdb) bt
#0  __lll_lock_wait_private ()
    at ../nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:95
#1  0x00007fe153d2efb9 in _L_lock_3719 () from /lib/x86_64-linux-gnu/libc.so.6
#2  0x00007fe153d2a2bb in _int_free (av=0x7fe154053620 <main_arena>, 
    p=0xbf0680, have_lock=0) at malloc.c:3943
#3  0x0000000000441d0d in freejob (jn=jn@entry=0x9afe30, 
    deleting=deleting@entry=1) at ../../Src/jobs.c:1240
#4  0x00000000004408b8 in deletejob (jn=jn@entry=0x9afe30, 
    disowning=disowning@entry=0) at ../../Src/jobs.c:1295
#5  0x0000000000440b0f in printjob (jn=jn@entry=0x9afe30, lng=0, 
    synch=synch@entry=0) at ../../Src/jobs.c:1012
#6  0x0000000000441c10 in update_job (jn=0x9afe30) at ../../Src/jobs.c:565
#7  0x0000000000470bb1 in wait_for_processes () at ../../Src/signals.c:515
#8  0x00000000004712c5 in zhandler (sig=17) at ../../Src/signals.c:594
#9  <signal handler called>
#10 0x00007fe153d2a022 in _int_free (av=0x7fe154053620 <main_arena>, 
    p=<optimized out>, have_lock=0) at malloc.c:3990
#11 0x0000000000445eae in lexrestore () at ../../Src/lex.c:344
#12 0x0000000000447dbf in parse_subscript (s=0x7fe154b9d42f "]", 
    sub=sub@entry=1, endchar=endchar@entry=93) at ../../Src/lex.c:1692
#13 0x0000000000457dc3 in isident (s=s@entry=0x7fe154b9d428 "psvar[2]")
    at ../../Src/params.c:1036
#14 0x000000000045e66c in assignsparam (s=s@entry=0x7fe154b9d428 "psvar[2]", 
    val=val@entry=0xbf19a0 "", flags=flags@entry=0) at ../../Src/params.c:2631
#15 0x0000000000422f8a in addvars (state=0x7fffa1a3b030, pc=<optimized out>, 
    addflags=addflags@entry=0) at ../../Src/exec.c:2279
#16 0x0000000000423271 in execsimple (state=state@entry=0x7fffa1a3b030)
    at ../../Src/exec.c:1113
#17 0x000000000042a4d0 in execlist (state=state@entry=0x7fffa1a3b030, 
    dont_change_job=dont_change_job@entry=1, exiting=exiting@entry=0)
    at ../../Src/exec.c:1259
#18 0x000000000042aa60 in execode (p=p@entry=0x9be400, 
    dont_change_job=dont_change_job@entry=1, exiting=exiting@entry=0, 
    context=context@entry=0x48acce "shfunc") at ../../Src/exec.c:1070
#19 0x0000000000424ab1 in runshfunc (prog=0x9be400, wrap=0x0, 
    name=0x7fe154ba82c8 "updprompt") at ../../Src/exec.c:4895
#20 0x00000000004250f6 in doshfunc (shfunc=shfunc@entry=0x9d1950, 
    doshargs=doshargs@entry=0x7fe154ba8268, noreturnval=noreturnval@entry=0)
    at ../../Src/exec.c:4775
#21 0x00000000004254a0 in execshfunc (shf=0x9d1950, args=0x7fe154ba8268)
    at ../../Src/exec.c:4432
#22 0x0000000000428cf9 in execshfunc (args=<optimized out>, 
    shf=<optimized out>) at ../../Src/exec.c:4400
#23 execcmd (state=0x7fffa1a3b7c0, input=input@entry=0, output=131696, 
    output@entry=0, how=0, how@entry=18, last1=0) at ../../Src/exec.c:3269
#24 0x000000000042921e in execpline2 (state=state@entry=0x7fffa1a3b7c0, 
    pcode=pcode@entry=67, how=how@entry=18, input=0, output=0, 
    last1=last1@entry=0) at ../../Src/exec.c:1691
#25 0x00000000004295e6 in execpline (state=state@entry=0x7fffa1a3b7c0, 
    slcode=<optimized out>, how=how@entry=18, last1=0) at ../../Src/exec.c:1478
#26 0x000000000042a791 in execlist (state=state@entry=0x7fffa1a3b7c0, 
    dont_change_job=dont_change_job@entry=1, exiting=exiting@entry=0)
    at ../../Src/exec.c:1261
#27 0x000000000042aa60 in execode (p=p@entry=0x9bc9a0, 
    dont_change_job=dont_change_job@entry=1, exiting=exiting@entry=0, 
    context=context@entry=0x48acce "shfunc") at ../../Src/exec.c:1070
#28 0x0000000000424ab1 in runshfunc (prog=0x9bc9a0, wrap=0x0, 
    name=0x7fe154ba8218 "TRAPCHLD") at ../../Src/exec.c:4895
#29 0x00000000004250f6 in doshfunc (shfunc=shfunc@entry=0x9d1860, 
    doshargs=doshargs@entry=0xbeaee0, noreturnval=noreturnval@entry=1)
    at ../../Src/exec.c:4775
#30 0x000000000046febd in dotrapargs (sig=17, 
    sigtr=sigtr@entry=0x6c2504 <sigtrapped+68>, sigfn=0x9d1860)
    at ../../Src/signals.c:1229
#31 0x0000000000470d78 in dotrap (sig=sig@entry=17) at ../../Src/signals.c:1322
#32 0x0000000000441a6e in update_job (jn=0x9afdb0) at ../../Src/jobs.c:570
#33 0x0000000000470bb1 in wait_for_processes () at ../../Src/signals.c:515
#34 0x00000000004712c5 in zhandler (sig=17) at ../../Src/signals.c:594
#35 <signal handler called>
#36 0x00007fe153ce63b6 in do_sigsuspend (set=0x7fffa1a3c370)
    at ../sysdeps/unix/sysv/linux/sigsuspend.c:31
#37 __GI___sigsuspend (set=set@entry=0x7fffa1a3c370)
    at ../sysdeps/unix/sysv/linux/sigsuspend.c:41
#38 0x0000000000470766 in signal_suspend (sig=sig@entry=17, 
    wait_cmd=wait_cmd@entry=0) at ../../Src/signals.c:375
#39 0x0000000000442186 in zwaitjob (job=<optimized out>, wait_cmd=0)
    at ../../Src/jobs.c:1454
#40 0x0000000000442867 in waitjobs () at ../../Src/jobs.c:1499
#41 0x0000000000429c0b in execpline (state=state@entry=0x7fffa1a3cc40, 
    slcode=<optimized out>, how=<optimized out>, how@entry=18, last1=0)
    at ../../Src/exec.c:1554
#42 0x000000000042a791 in execlist (state=state@entry=0x7fffa1a3cc40, 
    dont_change_job=dont_change_job@entry=1, exiting=exiting@entry=0)
    at ../../Src/exec.c:1261
#43 0x000000000044a7b1 in execif (state=0x7fffa1a3cc40, do_exec=0)
    at ../../Src/loop.c:525
#44 0x0000000000428126 in execcmd (state=0x7fffa1a3cc40, input=8, 
    input@entry=0, output=output@entry=0, how=-1, how@entry=18, last1=0)
    at ../../Src/exec.c:3232
#45 0x000000000042921e in execpline2 (state=state@entry=0x7fffa1a3cc40, 
    pcode=pcode@entry=195, how=how@entry=18, input=0, output=0, 
    last1=last1@entry=0) at ../../Src/exec.c:1691
#46 0x00000000004295e6 in execpline (state=state@entry=0x7fffa1a3cc40, 
    slcode=<optimized out>, how=how@entry=18, last1=0) at ../../Src/exec.c:1478
#47 0x000000000042a791 in execlist (state=state@entry=0x7fffa1a3cc40, 
    dont_change_job=dont_change_job@entry=1, exiting=exiting@entry=0)
    at ../../Src/exec.c:1261
#48 0x000000000042aa60 in execode (p=p@entry=0x9da200, 
    dont_change_job=dont_change_job@entry=1, exiting=exiting@entry=0, 
    context=context@entry=0x48acce "shfunc") at ../../Src/exec.c:1070
#49 0x0000000000424ab1 in runshfunc (prog=0x9da200, wrap=0x0, 
    name=0x7fe154ba8090 "pager-wrapper") at ../../Src/exec.c:4895
#50 0x00000000004250f6 in doshfunc (shfunc=shfunc@entry=0x9da2c0, 
    doshargs=doshargs@entry=0x7fe154ba7f68, noreturnval=noreturnval@entry=0)
    at ../../Src/exec.c:4775
#51 0x00000000004254a0 in execshfunc (shf=0x9da2c0, args=0x7fe154ba7f68)
    at ../../Src/exec.c:4432
#52 0x0000000000428cf9 in execshfunc (args=<optimized out>, 
    shf=<optimized out>) at ../../Src/exec.c:4400
#53 execcmd (state=0x7fffa1a3d470, input=8, input@entry=11, 
    output=output@entry=0, how=-1, how@entry=18, last1=0)
    at ../../Src/exec.c:3269
#54 0x000000000042921e in execpline2 (state=state@entry=0x7fffa1a3d470, 
    pcode=<optimized out>, how=how@entry=18, input=11, output=output@entry=0, 
    last1=last1@entry=0) at ../../Src/exec.c:1691
#55 0x00000000004291dd in execpline2 (state=state@entry=0x7fffa1a3d470, 
    pcode=pcode@entry=163, how=how@entry=18, input=0, output=0, 
    last1=last1@entry=0) at ../../Src/exec.c:1752
#56 0x00000000004295e6 in execpline (state=state@entry=0x7fffa1a3d470, 
    slcode=<optimized out>, how=how@entry=18, last1=0) at ../../Src/exec.c:1478
#57 0x000000000042a791 in execlist (state=state@entry=0x7fffa1a3d470, 
    dont_change_job=dont_change_job@entry=0, exiting=exiting@entry=0)
    at ../../Src/exec.c:1261
#58 0x000000000042aa60 in execode (p=p@entry=0x7fe154ba7ce8, 
    dont_change_job=dont_change_job@entry=0, exiting=exiting@entry=0, 
    context=context@entry=0x48c2f1 "toplevel") at ../../Src/exec.c:1070
#59 0x000000000043b5cc in loop (toplevel=toplevel@entry=1, 
    justonce=justonce@entry=0) at ../../Src/init.c:185
#60 0x000000000043e6f6 in zsh_main (argc=<optimized out>, argv=<optimized out>)
    at ../../Src/init.c:1625
#61 0x00007fe153cd2b45 in __libc_start_main (main=0x40f1a0 <main>, argc=1, 
    argv=0x7fffa1a3d6a8, init=<optimized out>, fini=<optimized out>, 
    rtld_fini=<optimized out>, stack_end=0x7fffa1a3d698) at libc-start.c:287
#62 0x000000000040f1ce in _start ()

-- 
Vincent Lefèvre <vincent@xxxxxxxxxx> - Web: <https://www.vinc17.net/>
100% accessible validated (X)HTML - Blog: <https://www.vinc17.net/blog/>
Work: CR INRIA - computer arithmetic / AriC project (LIP, ENS-Lyon)
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