[Aptitude-devel] Bug#823734: aptitude: Segfaults in TUI if you press "!" when there is no conflict

[Axel Beckert]

Package: aptitude
Version: 0.8.1-1
Severity: normal

If I press "!" in aptitude's TUI and there's no conflict to solve,
aptitude segfaults.

This can happen if you e.g. accidentially press "!" twice in a row
instead of only once to solve a conflict.

Backtrace:

#0  imm::set<std::pair<aptitude_resolver_package, generic_choice<aptitude_universe> >, imm::key_compare<aptitude_resolver_package, generic_choice<aptitude_universe>, aptitude::util::compare3_f<aptitude_resolver_package> >, imm::nil_t, imm::nil_t, 4>::const_iterator::const_iterator (root=..., this=0x7fffffffc7e0)
    at ../../src/generic/util/immset.h:592
#1  imm::set<std::pair<aptitude_resolver_package, generic_choice<aptitude_universe> >, imm::key_compare<aptitude_resolver_package, generic_choice<aptitude_universe>, aptitude::util::compare3_f<aptitude_resolver_package> >, imm::nil_t, imm::nil_t, 4>::begin (this=<optimized out>)
    at ../../src/generic/util/immset.h:1061
#2  imm::map<aptitude_resolver_package, generic_choice<aptitude_universe>, aptitude::util::compare3_f<aptitude_resolver_package>, imm::nil_t, imm::nil_t>::begin (this=<optimized out>) at ../../src/generic/util/immset.h:1272
#3  generic_choice_set<aptitude_universe>::begin (this=<optimized out>) at ../../src/generic/problemresolver/choice_set.h:310
#4  0x000055555578b358 in resolver_manager::approve_all_broken_deps (this=0x555556d987d0) at ../../../../src/generic/apt/resolver_manager.cc:1606
#5  0x000055555567adf6 in do_apply_solution () at ../../src/ui.cc:2332
#6  0x00007ffff71d6338 in sigc::slot0<void>::operator() (this=0x555555cd4d48) at /usr/include/sigc++-2.0/sigc++/functors/slot.h:440
#7  cwidget::widgets::widget::handle_key (this=this at entry=0x555555cd3bb0, k=...) at widget.cc:242
#8  0x00007ffff71ad406 in cwidget::widgets::passthrough::handle_key (this=0x555555cd3bb0, k=...) at passthrough.cc:98
#9  0x00007ffff71d9ab3 in cwidget::widgets::widget::dispatch_key (this=0x555555cd3bb0, k=...) at widget.cc:267
#10 0x00007ffff718e1f1 in cwidget::widgets::menubar::handle_key (this=0x555555cc09b0, k=...) at menubar.cc:641
#11 0x00007ffff71d9ab3 in cwidget::widgets::widget::dispatch_key (this=0x555555cc09b0, k=...) at widget.cc:267
#12 0x00007ffff715bdc9 in cwidget::toplevel::input_thread::get_input_event::dispatch (this=0x7fffe00008c0) at toplevel.cc:400
#13 0x00007ffff71536b5 in cwidget::toplevel::mainloop (synch=synch at entry=0) at toplevel.cc:1171
#14 0x000055555568c64a in ui_main () at ../../src/ui.cc:3075
#15 0x00005555555b50e0 in main (argc=<optimized out>, argv=<optimized out>) at ../../src/main.cc:1398

-- Package-specific info:
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-- System Information:
Debian Release: stretch/sid
  APT prefers unstable
  APT policy: (990, 'unstable'), (980, 'unstable-debug'), (600, 'testing'), (111, 'buildd-unstable'), (111, 'buildd-experimental'), (110, 'experimental'), (105, 'experimental-debug')
Architecture: amd64 (x86_64)

Kernel: Linux 4.5.0-2-amd64 (SMP w/4 CPU cores)
Locale: LANG=C.UTF-8, LC_CTYPE=C.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages aptitude depends on:
ii  aptitude-common            0.8.1-1
ii  libapt-pkg5.0              1.2.11
ii  libboost-filesystem1.58.0  1.58.0+dfsg-5+b1
ii  libboost-iostreams1.58.0   1.58.0+dfsg-5+b1
ii  libboost-system1.58.0      1.58.0+dfsg-5+b1
ii  libc6                      2.22-7
ii  libcwidget3v5              0.5.17-4+b1
ii  libgcc1                    1:6.1.1-1
ii  libncursesw5               6.0+20160319-1
ii  libsigc++-2.0-0v5          2.8.0-1
ii  libsqlite3-0               3.12.2-1
ii  libstdc++6                 6.1.1-1
ii  libtinfo5                  6.0+20160319-1
ii  libxapian22v5              1.2.23-1

Versions of packages aptitude recommends:
ii  libparse-debianchangelog-perl  1.2.0-8
ii  sensible-utils                 0.0.9

Versions of packages aptitude suggests:
ii  apt-xapian-index                0.47+nmu2
ii  aptitude-doc-en [aptitude-doc]  0.8.1-1
ii  debtags                         2.1
ii  tasksel                         3.34

-- no debconf information