[Pkg-zsh-devel] Bug#790282: zsh frozen after typing Ctrl-Z then bg

[Vincent Lefevre]

Package: zsh
Version: 5.0.8-1
Severity: normal

I started emacs from zsh, then wanted to put it in background.
So, I did Ctrl-Z, then bg. But instead of getting the prompt
back, zsh is frozen. Ctrl-C has no effect. Here's 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  0x00007fc1c05b352a in _L_lock_10381 () from /lib/x86_64-linux-gnu/libc.so.6
#2  0x00007fc1c05b1065 in __GI___libc_malloc (bytes=8) at malloc.c:2887
#3  0x0000000000451660 in zalloc (size=<optimized out>, size at entry=8)
    at ../../Src/mem.c:900
#4  0x000000000044516b in addbgstatus (pid=pid at entry=27181, status=148)
    at ../../Src/jobs.c:2015
#5  0x00000000004739d5 in wait_for_processes () at ../../Src/signals.c:532
#6  0x0000000000474105 in zhandler (sig=17) at ../../Src/signals.c:594
#7  <signal handler called>
#8  _int_malloc (av=0x7fc1c08d8620 <main_arena>, bytes=304) at malloc.c:3389
#9  0x00007fc1c05b1070 in __GI___libc_malloc (bytes=304) at malloc.c:2891
#10 0x0000000000422ea2 in zcontext_save_partial (parts=parts at entry=7)
    at ../../Src/context.c:56
#11 0x0000000000422f3a in zcontext_save () at ../../Src/context.c:78
#12 0x0000000000449d40 in parse_subscript (s=0x7fc1c142c68e "1]", 
    sub=sub at entry=1, endchar=endchar at entry=93) at ../../Src/lex.c:1615
#13 0x000000000045a243 in isident (s=s at entry=0x7fc1c142c688 "psvar[1]")
    at ../../Src/params.c:1076
#14 0x0000000000460dee in assignsparam (s=s at entry=0x7fc1c142c688 "psvar[1]", 
    val=val at entry=0x12012d0 "0", flags=flags at entry=0)
    at ../../Src/params.c:2691
#15 0x0000000000424871 in addvars (state=0x7ffc6952e5d0, pc=<optimized out>, 
    addflags=addflags at entry=0) at ../../Src/exec.c:2317
#16 0x000000000042d291 in execsimple (state=state at entry=0x7ffc6952e5d0)
    at ../../Src/exec.c:1117
#17 0x000000000042ad30 in execlist (state=state at entry=0x7ffc6952e5d0, 
    dont_change_job=dont_change_job at entry=1, exiting=exiting at entry=0)
    at ../../Src/exec.c:1274
#18 0x000000000042b300 in execode (p=p at entry=0xfc41a0, 
    dont_change_job=dont_change_job at entry=1, exiting=exiting at entry=0, 
    context=context at entry=0x48eb37 "shfunc") at ../../Src/exec.c:1074
#19 0x000000000042be01 in runshfunc (prog=0xfc41a0, wrap=0x0, 
    name=0x7fc1c142c660 "precmd") at ../../Src/exec.c:5167
#20 0x000000000042c466 in doshfunc (shfunc=0xfc9690, 
    doshargs=doshargs at entry=0x0, noreturnval=noreturnval at entry=1)
    at ../../Src/exec.c:5037
#21 0x0000000000483771 in callhookfunc (name=0x497b3f "precmd", lnklst=0x0, 
    arrayp=1, retval=0x0) at ../../Src/utils.c:1332
#22 0x000000000048b953 in preprompt () at ../../Src/utils.c:1416
#23 0x000000000043d1c3 in loop (toplevel=toplevel at entry=1, 
    justonce=justonce at entry=0) at ../../Src/init.c:129
#24 0x00000000004404de in zsh_main (argc=<optimized out>, argv=<optimized out>)
    at ../../Src/init.c:1674
#25 0x00007fc1c0556b45 in __libc_start_main (main=0x40fc90 <main>, argc=1, 
    argv=0x7ffc6952eca8, init=<optimized out>, fini=<optimized out>, 
    rtld_fini=<optimized out>, stack_end=0x7ffc6952ec98) at libc-start.c:287
#26 0x000000000040fcbe in _start ()

When I typed Ctrl-\, zsh quit.

-- Package-specific info:

Packages which provide vendor completions:

Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name           Version      Architecture Description
+++-==============-============-============-=================================
ii  pulseaudio     6.0-2        amd64        PulseAudio sound server
ii  systemd        220-7        amd64        system and service manager
ii  vlc-nox        2.2.1-2+b1   amd64        multimedia player and streamer (w

The following files were modified:

/etc/systemd/logind.conf

dpkg-query: no path found matching pattern /usr/share/zsh/vendor-functions/


-- System Information:
Debian Release: stretch/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (500, 'testing'), (500, 'stable'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.0.0-2-amd64 (SMP w/2 CPU cores)
Locale: LANG=POSIX, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: sysvinit (via /sbin/init)

Versions of packages zsh depends on:
ii  dpkg        1.18.1
ii  libc6       2.19-18
ii  libcap2     1:2.24-9
ii  libtinfo5   5.9+20150516-2
ii  zsh-common  5.0.8-1

Versions of packages zsh recommends:
ii  libncursesw5  5.9+20150516-2
ii  libpcre3      2:8.35-7

Versions of packages zsh suggests:
ii  zsh-doc  5.0.8-1

-- no debconf information