Bug#921923: gnome-calendar: Segfault when adding CalDAV calendar

[Tim Dengel]

Package: gnome-calendar
Version: 3.31.90-1
Severity: important

Dear Maintainer,


* What led up to the situation?
 - I tried to add a new CalDAV calendar through the calendar settings
* What exactly did you do (or not do) that was effective (or
  ineffective)?
 - Clicked on the calendar icon in the app's title bar (Tooltip: "Manage Calendars")[0]
 - Clicked on "Caldendar settings"
 - Clicked on drop-down menu "Add"
 - Clicked on "From the Internet..."
 - Entered CalDAV URL
 - Entered correct[1] Username and Password
 - Clicked on "Connect"
* What was the outcome of this action?
 - Segfault
* What outcome did you expect instead?
 - No segfault

[0] I translated the UI element texts, as gnome-calendar seems to ignore LANG=C.
[1] Incorrect username or password will not trigger the segfault, but also display no information about unsucessful login 

Here is a backtrace of the segfault:
#0  0x000055555559ff98 in discover_sources_cb (source=0x7fffc00216f0 [ESource], result=<optimized out>, user_data=user_data at entry=0x555555b59820) at ../src/gcal-source-dialog.c:1545
        self = 0x555555b59820 [GcalSourceDialog]
        discovered_sources = 0x0
        user_addresses = 0x0
        aux = <optimized out>
        error = 0x0
#1  0x00007ffff7291719 in g_task_return_now (task=0x5555557050e0 [GTask]) at ../../../gio/gtask.c:1148
#2  0x00007ffff7291759 in complete_in_idle_cb (task=0x5555557050e0) at ../../../gio/gtask.c:1162
#3  0x00007ffff70c7dd8 in g_main_dispatch (context=0x555555629240) at ../../../glib/gmain.c:3182
        dispatch = 0x7ffff70c4780 <g_idle_dispatch>
        prev_source = 0x0
        was_in_call = 0
        user_data = 0x5555557050e0
        callback = 0x7ffff7291750 <complete_in_idle_cb>
        cb_funcs = <optimized out>
        cb_data = 0x7fffc0013660
        need_destroy = <optimized out>
        source = 0x7fffc0040c60
        current = 0x5555555fad40
        i = 0
        __FUNCTION__ = "g_main_dispatch"
#4  0x00007ffff70c7dd8 in g_main_context_dispatch (context=context at entry=0x555555629240) at ../../../glib/gmain.c:3847
#5  0x00007ffff70c81c8 in g_main_context_iterate (context=context at entry=0x555555629240, block=block at entry=1, dispatch=dispatch at entry=1, self=<optimized out>) at ../../../glib/gmain.c:3920
        max_priority = 2147483647
        timeout = 89
        some_ready = 1
        nfds = <optimized out>
        allocated_nfds = 6
        fds = 0x5555567da2a0
#6  0x00007ffff70c825c in g_main_context_iteration (context=context at entry=0x555555629240, may_block=may_block at entry=1) at ../../../glib/gmain.c:3981
        retval = <optimized out>
#7  0x00007ffff72bc99d in g_application_run (application=0x55555561c0e0 [GcalApplication], argc=<optimized out>, argv=0x7fffffffe138) at ../../../gio/gapplication.c:2470
        arguments = 0x5555555e2fd0
        status = 0
        context = 0x555555629240
        acquired_context = 1
        __FUNCTION__ = "g_application_run"
#8  0x0000555555571ebb in main (argc=1, argv=0x7fffffffe138) at ../src/main.c:40
        app = 0x55555561c0e0


-- System Information:
Debian Release: buster/sid
  APT prefers unstable-debug
  APT policy: (500, 'unstable-debug'), (500, 'unstable'), (1, 'experimental-debug'), (1, 'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 4.18.0-3-amd64 (SMP w/8 CPU cores)
Kernel taint flags: TAINT_WARN
Locale: LANG=de_DE.UTF-8, LC_CTYPE=de_DE.UTF-8 (charmap=UTF-8), LANGUAGE=de_DE.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages gnome-calendar depends on:
ii  dconf-gsettings-backend [gsettings-backend]  0.30.1-2
ii  gsettings-desktop-schemas                    3.28.1-1
ii  libc6                                        2.28-7
ii  libcairo2                                    1.16.0-2
ii  libdazzle-1.0-0                              3.30.2-2
ii  libecal-1.2-19                               3.30.5-1
ii  libedataserver-1.2-23                        3.30.5-1
ii  libedataserverui-1.2-2                       3.30.5-1
ii  libgeoclue-2-0                               2.5.2-1
ii  libglib2.0-0                                 2.58.3-1
ii  libgoa-1.0-0b                                3.30.1-2
ii  libgtk-3-0                                   3.24.5-1
ii  libgweather-3-15                             3.28.2-2
ii  libical3                                     3.0.4-3
ii  libpango-1.0-0                               1.42.4-6
ii  libpangocairo-1.0-0                          1.42.4-6
ii  libsoup2.4-1                                 2.64.2-2

Versions of packages gnome-calendar recommends:
ii  evolution-data-server  3.30.5-1

gnome-calendar suggests no packages.

-- no debconf information