Package: aptitude
Version: 0.8.3-1

Hi Manuel,

after an aptitude "Performing actions" run I typed "q" and pressed
enter.

While the "Updating … and quitting" screen was shown I already started
to type "update-alternatives --config" and aptitude segfaulted with the
following backtraces:

warning: core file may not match specified executable file.
[New LWP 7417]
[New LWP 7428]
[New LWP 7418]
[New LWP 32113]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
Core was generated by `aptitude -u'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0  0x00007fead2446720 in _xend () at 
../sysdeps/unix/sysv/linux/x86/elision-unlock.c:33
33      ../sysdeps/unix/sysv/linux/x86/elision-unlock.c: No such file or 
directory.
[Current thread is 1 (Thread 0x7feacebc6700 (LWP 7417))]
(gdb) bt
#0  0x00007fead2446720 in _xend () at 
../sysdeps/unix/sysv/linux/x86/elision-unlock.c:33
#1  __lll_unlock_elision (lock=0x7fead3689360 
<cwidget::toplevel::input_thread::input_event_mutex>, private=0)
    at ../sysdeps/unix/sysv/linux/x86/elision-unlock.c:29
#2  0x00007fead33e3b9a in cwidget::toplevel::input_thread::operator()() () from 
/usr/lib/x86_64-linux-gnu/libcwidget.so.3
#3  0x00007fead33e3bc1 in void* 
cwidget::threads::thread::bootstrap<cwidget::threads::bootstrap_proxy<cwidget::toplevel::input_thread>
 >(void*) ()
   from /usr/lib/x86_64-linux-gnu/libcwidget.so.3
#4  0x00007fead243b464 in start_thread (arg=0x7feacebc6700) at 
pthread_create.c:333
#5  0x00007fead18e297f in clone () at 
../sysdeps/unix/sysv/linux/x86_64/clone.S:105
(gdb) 

HTH.

-- Package-specific info:
Terminal: eterm-color
$DISPLAY is set.
which aptitude: /usr/bin/aptitude

aptitude version information:
aptitude 0.8.3
Compiler: g++ 6.1.1 20160802
Compiled against:
  apt version 5.0.0
  NCurses version 6.0
  libsigc++ version: 2.8.0
  Gtk+ support disabled.
  Qt support disabled.

Current library versions:
  NCurses version: ncurses 6.0.20160625
  cwidget version: 0.5.17
  Apt version: 5.0.0

aptitude linkage:
        linux-vdso.so.1 (0x00007ffdcb720000)
        libapt-pkg.so.5.0 => /usr/lib/x86_64-linux-gnu/libapt-pkg.so.5.0 
(0x00007f4b9bdcf000)
        libncursesw.so.5 => /lib/x86_64-linux-gnu/libncursesw.so.5 
(0x00007f4b9bb9f000)
        libtinfo.so.5 => /lib/x86_64-linux-gnu/libtinfo.so.5 
(0x00007f4b9b975000)
        libsigc-2.0.so.0 => /usr/lib/x86_64-linux-gnu/libsigc-2.0.so.0 
(0x00007f4b9b76e000)
        libcwidget.so.3 => /usr/lib/x86_64-linux-gnu/libcwidget.so.3 
(0x00007f4b9b471000)
        libsqlite3.so.0 => /usr/lib/x86_64-linux-gnu/libsqlite3.so.0 
(0x00007f4b9b16c000)
        libboost_iostreams.so.1.61.0 => 
/usr/lib/x86_64-linux-gnu/libboost_iostreams.so.1.61.0 (0x00007f4b9af54000)
        libboost_filesystem.so.1.61.0 => 
/usr/lib/x86_64-linux-gnu/libboost_filesystem.so.1.61.0 (0x00007f4b9ad3b000)
        libboost_system.so.1.61.0 => 
/usr/lib/x86_64-linux-gnu/libboost_system.so.1.61.0 (0x00007f4b9ab37000)
        libxapian.so.22 => /usr/lib/x86_64-linux-gnu/libxapian.so.22 
(0x00007f4b9a733000)
        libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 
(0x00007f4b9a516000)
        libstdc++.so.6 => /usr/lib/x86_64-linux-gnu/libstdc++.so.6 
(0x00007f4b9a193000)
        libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007f4b99e8f000)
        libgcc_s.so.1 => /lib/x86_64-linux-gnu/libgcc_s.so.1 
(0x00007f4b99c78000)
        libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f4b998da000)
        libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007f4b996d6000)
        libresolv.so.2 => /lib/x86_64-linux-gnu/libresolv.so.2 
(0x00007f4b994bf000)
        libz.so.1 => /lib/x86_64-linux-gnu/libz.so.1 (0x00007f4b992a2000)
        libbz2.so.1.0 => /lib/x86_64-linux-gnu/libbz2.so.1.0 
(0x00007f4b99092000)
        liblzma.so.5 => /lib/x86_64-linux-gnu/liblzma.so.5 (0x00007f4b98e6f000)
        liblz4.so.1 => /usr/lib/x86_64-linux-gnu/liblz4.so.1 
(0x00007f4b98c5d000)
        librt.so.1 => /lib/x86_64-linux-gnu/librt.so.1 (0x00007f4b98a55000)
        libuuid.so.1 => /lib/x86_64-linux-gnu/libuuid.so.1 (0x00007f4b9884e000)
        /lib64/ld-linux-x86-64.so.2 (0x000055f50b58e000)
-- System Information:
Debian Release: stretch/sid
  APT prefers unstable
  APT policy: (990, 'unstable'), (600, 'testing'), (500, 'unstable-debug'), 
(500, 'buildd-unstable'), (110, 'experimental'), (1, 'experimental-debug'), (1, 
'buildd-experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 4.8.0-rc5-amd64 (SMP w/8 CPU cores)
Locale: LANG=C.UTF-8, LC_CTYPE=C.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: sysvinit (via /sbin/init)

Versions of packages aptitude depends on:
ii  aptitude-common            0.8.3-1
ii  libapt-pkg5.0              1.3~rc4
ii  libboost-filesystem1.61.0  1.61.0+dfsg-2.1+b1
ii  libboost-iostreams1.61.0   1.61.0+dfsg-2.1+b1
ii  libboost-system1.61.0      1.61.0+dfsg-2.1+b1
ii  libc6                      2.24-2
ii  libcwidget3v5              0.5.17-4+b1
ii  libgcc1                    1:6.2.0-3
ii  libncursesw5               6.0+20160625-1
ii  libsigc++-2.0-0v5          2.8.0-2
ii  libsqlite3-0               3.14.1-1
ii  libstdc++6                 6.2.0-3
ii  libtinfo5                  6.0+20160625-1
ii  libxapian22v5              1.2.23-1

Versions of packages aptitude recommends:
ii  libparse-debianchangelog-perl  1.2.0-10
ii  sensible-utils                 0.0.9

Versions of packages aptitude suggests:
ii  apt-xapian-index                0.48
ii  aptitude-doc-en [aptitude-doc]  0.8.3-1
ii  debtags                         2.1.2
pn  tasksel                         <none>

-- no debconf information

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