src/date-time.cpp:171:GDateTime* unity::indicator::datetime::DateTime::get() const: assertion failed: (m_dt)

[Benjamin Drung]

After upgrading to Ubuntu 19.10, indicator-datetime 15.10+19.10.20190819.1-0ubuntu1 crashes right from the start:

$ /usr/lib/x86_64-linux-gnu/indicator-datetime/indicator-datetime-service
(process:17641): Indicator-Datetime-WARNING **: 01:46:35.442: Unrecognized TZID: 'Etc/Utc'
(process:17641): Indicator-Datetime-WARNING **: 01:46:35.442: Unrecognized TZID: 'Etc/Utc'
(process:17641): Indicator-Datetime-WARNING **: 01:46:35.448: Unrecognized TZID: 'Etc/Utc'
(process:17641): libecal-CRITICAL **: 01:46:35.457: e_cal_component_datetime_get_value: assertion 'dt != NULL' failed
(process:17641): libecal-CRITICAL **: 01:46:35.457: e_cal_component_datetime_get_value: assertion 'dt != NULL' failed
(process:17641): libical-glib-CRITICAL **: 01:46:35.457: i_cal_time_as_timet: assertion 'I_CAL_IS_TIME (tt)' failed
(process:17641): libical-glib-CRITICAL **: 01:46:35.457: i_cal_time_as_timet: assertion 'I_CAL_IS_TIME (tt)' failed
[...]
(process:17641): libical-glib-CRITICAL **: 01:46:35.458: i_cal_time_as_timet: assertion 'I_CAL_IS_TIME (tt)' failed
(process:17641): libecal-CRITICAL **: 01:46:35.458: e_cal_component_datetime_get_value: assertion 'dt != NULL' failed
(process:17641): libecal-CRITICAL **: 01:46:35.458: e_cal_component_datetime_get_value: assertion 'dt != NULL' failed
(process:17641): libical-glib-CRITICAL **: 01:46:35.458: i_cal_time_as_timet: assertion 'I_CAL_IS_TIME (tt)' failed
(process:17641): libical-glib-CRITICAL **: 01:46:35.458: i_cal_time_as_timet: assertion 'I_CAL_IS_TIME (tt)' failed
**
Indicator-Datetime:ERROR:/build/indicator-datetime-P60bPZ/indicator-datetime-15.10+19.10.20190819.1/src/date-time.cpp:171:GDateTime* unity::indicator::datetime::DateTime::get() const: assertion failed: (m_dt)
Bail out! Indicator-Datetime:ERROR:/build/indicator-datetime-P60bPZ/indicator-datetime-15.10+19.10.20190819.1/src/date-time.cpp:171:GDateTime* unity::indicator::datetime::DateTime::get() const: assertion failed: (m_dt)

[Benjamin Drung (bdrung)]

I am not the only one running into this bug: https://ubuntu-mate.community/t/clock-indicator-wont-appear-19-10/20424

[Sebastien Bacher (seb128)]

Could you get a backtrace using gdb?

[Martin Wimpress  (flexiondotorg)]

Added to Trello: https://trello.com/c/j7sTOblj/241-bug1848969-src-date-timecpp171gdatetime-unityindicatordatetimedatetimeget-const-assertion-failed-mdt

[Benjamin Drung (bdrung)]

Here is the backtrace:

Thread 1 "indicator-datet" received signal SIGABRT, Aborted.
__GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:50
50 ../sysdeps/unix/sysv/linux/raise.c: Datei oder Verzeichnis nicht gefunden.
(gdb) bt
#0 0x00007ffff6eaa3eb in __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:50
#1 0x00007ffff6e89899 in __GI_abort () at abort.c:79
#2 0x00007ffff7283b23 in g_assertion_message
    (domain=<optimized out>, file=<optimized out>, line=<optimized out>, func=0x5555556310c8 "GDateTime* unity::indicator::datetime::DateTime::get() const", message=<optimized out>)
    at ../../../glib/gtestutils.c:2912
#3 0x00007ffff72e032f in g_assertion_message_expr
    (domain=domain@entry=0x55555562d017 "Indicator-Datetime", file=file@entry=0x555555631108 "/build/indicator-datetime-P60bPZ/indicator-datetime-15.10+19.10.20190819.1/src/date-time.cpp", line=line@entry=171, func=func@entry=0x5555556310c8 "GDateTime* unity::indicator::datetime::DateTime::get() const", expr=expr@entry=0x5555556310a0 "m_dt") at ../../../glib/gtestutils.c:2938
#4 0x00005555555cda9c in unity::indicator::datetime::DateTime::get() const (this=0x7fffffffd878) at ./src/date-time.cpp:171
#5 0x00005555555cdd15 in unity::indicator::datetime::DateTime::get() const (this=0x7fffffffd878) at ./src/date-time.cpp:171
#6 0x00005555555cdd15 in unity::indicator::datetime::DateTime::format(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) const
    (this=this@entry=0x7fffffffd878, fmt="%F %T %z") at ./src/date-time.cpp:179
#7 0x00005555555d2d83 in unity::indicator::datetime::EdsEngine::Impl::get_appointment(_ECalClient*, std::shared_ptr<_GCancellable>&, _ECalComponent*, _GTimeZone*) (client=<optimized out>, cancellable=Warnung: RTTI symbol not found for class 'std::_Sp_counted_deleter<_GCancellable*, unity::indicator::datetime::EdsEngine::Impl::Impl(std::shared_ptr<unity::indicator::datetime::Myself> const&)::{lambda(_GCancellable*)#1}, std::allocator<void>, (__gnu_cxx::_Lock_policy)2>'
Warnung: RTTI symbol not found for class 'std::_Sp_counted_deleter<_GCancellable*, unity::indicator::datetime::EdsEngine::Impl::Impl(std::shared_ptr<unity::indicator::datetime::Myself> const&)::{lambda(_GCancellable*)#1}, std::allocator<void>, (__gnu_cxx::_Lock_policy)2>'

std::shared_ptr<struct _GCancellable> (use count 23, weak count 0) = {...}, component=component@entry=0x7fffe405c560 [ECalComponent], gtz=gtz@entry=0x5555556f1960)
    at /usr/include/c++/9/bits/char_traits.h:300
#8 0x00005555555dfe7e in unity::indicator::datetime::EdsEngine::Impl::add_event_to_subtask(_ECalComponent*, unity::indicator::datetime::EdsEngine::Impl::ClientSubtask*, _GTimeZone*)
    (gtz=0x5555556f1960, subtask=0x555555774a50, component=0x7fffe405c560 [ECalComponent]) at ./src/engine-eds.cpp:1166
#9 0x00005555555dfe7e in unity::indicator::datetime::EdsEngine::Impl::on_event_fetch_list_done(void*) (gsubtask=0x555555774a50) at ./src/engine-eds.cpp:866
#10 0x00005555555dfe7e in unity::indicator::datetime::EdsEngine::Impl::fetch_detached_instances(_GObject*, _GAsyncResult*, void*) (res=<optimized out>, gsubtask=0x555555774a50)
    at ./src/engin...

[Sebastien Bacher (seb128)]

Setting as rls-ff-notfixing since from a Desktop Team perspective/workflow it's our of our active set now and we are not going to consider it as a blocker. It's just a workflow detail though and doesn't mean the bug shouldn't be/isn't going to be fixed

[Benjamin Drung (bdrung)]

The underlying issue is that i_cal_timezone_get_builtin_timezone_from_tzid and i_cal_timezone_get_builtin_timezone included from /usr/include/libical-glib/i-cal-timezone.h (libical-dev) fail to determine the timezone for "Etc/Utc" or "Etc/UTC".

[Benjamin Drung (bdrung)]

Correction: Applying following patch does not solve this assertion failure:

diff --git a/src/engine-eds.cpp b/src/engine-eds.cpp
index 153a9ea..8e2674f 100644
--- a/src/engine-eds.cpp
+++ b/src/engine-eds.cpp
@@ -879,6 +879,11 @@ private:
         if (tzid == nullptr)
             return nullptr;

+ // Workaround: Etc/Utc is not known to i_cal_timezone_get_builtin_timezone_from_tzid/i_cal_timezone_get_builtin_timezone
+ if (strcmp("Etc/Utc", tzid) == 0) {
+ return g_time_zone_new("Z");
+ }
+
         auto itz = i_cal_timezone_get_builtin_timezone_from_tzid(tzid); // usually works

         if (itz == nullptr) // fallback

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.