Segfault after clicking on a task

[qdii]

Describe the bug
After clicking on "Tasks", the desktop app SEGFAULTs

To Reproduce
Steps to reproduce the behavior:

1. Launch the app
2. Click on "Tâches" (one of the task lists, see screenshot)

Expected behavior
The application loads the list of tasks

Screenshots

Desktop (please complete the following information):

• ArchLinux
• Version 4.18.0

Additional context

(gdb) bt
#0  signal_emit_valist_unlocked (instance=instance@entry=0x55555722a120, signal_id=signal_id@entry=1, detail=detail@entry=1492, var_args=var_args@entry=0x7fffff7ff250) at ../glib/gobject/gsignal.c:3302
#1  0x00007ffff7c1bd89 in g_signal_emit_valist (instance=0x55555722a120, signal_id=1, detail=1492, var_args=var_args@entry=0x7fffff7ff250) at ../glib/gobject/gsignal.c:3278
#2  0x00007ffff7c1be44 in g_signal_emit (instance=<optimized out>, signal_id=<optimized out>, detail=<optimized out>) at ../glib/gobject/gsignal.c:3598
#3  0x00007ffff7c07326 in g_object_dispatch_properties_changed (object=0x55555722a120, n_pspecs=<optimized out>, pspecs=<optimized out>) at ../glib/gobject/gobject.c:1889
#4  0x00007ffff7bfad78 in g_object_notify_queue_thaw (object=0x55555722a120, take_ref=0) at ../glib/gobject/gobject.c:761
#5  0x00007ffff7c0cbba in g_object_constructor (type=<optimized out>, n_construct_properties=<optimized out>, construct_params=0x7fffff7ff4c0) at ../glib/gobject/gobject.c:3056
#6  0x00007ffff79dd157 in gee_abstract_collection_constructor (type=<optimized out>, n_construct_properties=<optimized out>, construct_properties=<optimized out>)
    at /usr/src/debug/libgee/libgee/gee/abstractcollection.c:530
#7  0x00007ffff79dd1e7 in gee_abstract_list_constructor (type=<optimized out>, n_construct_properties=<optimized out>, construct_properties=<optimized out>)
    at /usr/src/debug/libgee/libgee/gee/abstractlist.c:540
#8  0x00007ffff79dcfa7 in gee_abstract_bidir_list_constructor (type=<optimized out>, n_construct_properties=<optimized out>, construct_properties=<optimized out>)
    at /usr/src/debug/libgee/libgee/gee/abstractbidirlist.c:386
#9  0x00007ffff7c0c692 in g_object_new_with_custom_constructor (class=class@entry=0x5555559f1620, params=params@entry=0x7fffff7ff670, n_params=n_params@entry=3) at ../glib/gobject/gobject.c:2585
#10 0x00007ffff7c0ea05 in g_object_new_internal (class=0x5555559f1620, params=0x7fffff7ff670, n_params=3) at ../glib/gobject/gobject.c:2663
#11 g_object_new_valist (object_type=<optimized out>, first_property_name=first_property_name@entry=0x7ffff7a5d8ad "g-type", var_args=var_args@entry=0x7fffff7ff940) at ../glib/gobject/gobject.c:3003
#12 0x00007ffff7c0f2c0 in g_object_new (object_type=<optimized out>, first_property_name=first_property_name@entry=0x7ffff7a5d8ad "g-type") at ../glib/gobject/gobject.c:2479
#13 0x00007ffff79e25d0 in gee_abstract_collection_construct (object_type=<optimized out>, g_type=g_type@entry=93824997077904, g_dup_func=g_dup_func@entry=0x7ffff7c07900 <g_object_ref>, 
    g_destroy_func=g_destroy_func@entry=0x7ffff7c0ad20 <g_object_unref>) at /usr/src/debug/libgee/libgee/gee/abstractcollection.c:453
#14 0x00007ffff79e2610 in gee_abstract_list_construct (object_type=<optimized out>, g_type=g_type@entry=93824997077904, g_dup_func=g_dup_func@entry=0x7ffff7c07900 <g_object_ref>, 
    g_destroy_func=g_destroy_func@entry=0x7ffff7c0ad20 <g_object_unref>) at /usr/src/debug/libgee/libgee/gee/abstractlist.c:487
#15 0x00007ffff79e2650 in gee_abstract_bidir_list_construct (object_type=<optimized out>, g_type=g_type@entry=93824997077904, g_dup_func=g_dup_func@entry=0x7ffff7c07900 <g_object_ref>, 
    g_destroy_func=g_destroy_func@entry=0x7ffff7c0ad20 <g_object_unref>) at /usr/src/debug/libgee/libgee/gee/abstractbidirlist.c:333
#16 0x00007ffff79e70d2 in gee_array_list_construct (object_type=<optimized out>, g_type=g_type@entry=93824997077904, g_dup_func=g_dup_func@entry=0x7ffff7c07900 <g_object_ref>, 
    g_destroy_func=g_destroy_func@entry=0x7ffff7c0ad20 <g_object_unref>, equal_func=equal_func@entry=0x0, equal_func_target=equal_func_target@entry=0x0, equal_func_target_destroy_notify=0x0)
    at /usr/src/debug/libgee/libgee/gee/arraylist.c:396
#17 0x00007ffff79e7b90 in gee_array_list_new (g_type=93824997077904, g_dup_func=0x7ffff7c07900 <g_object_ref>, g_destroy_func=0x7ffff7c0ad20 <g_object_unref>, equal_func=equal_func@entry=0x0, 
    equal_func_target=equal_func_target@entry=0x0, equal_func_target_destroy_notify=equal_func_target_destroy_notify@entry=0x0) at /usr/src/debug/libgee/libgee/gee/arraylist.c:443
#18 0x00007ffff7e84d0a in services_store_get_subitems_uncomplete (self=0x55555582edc0, i=0x5555560833c0) at core/libplanify.so.0.1.p/Services/Store.c:4941
#19 0x00007ffff7f12bd7 in objects_item_get_items_uncomplete (self=0x5555560833c0) at core/libplanify.so.0.1.p/Objects/Item.c:9376
#20 0x00007ffff7f21272 in objects_section_get_subitem_size (self=self@entry=0x555557188070, item=item@entry=0x5555560833c0) at core/libplanify.so.0.1.p/Objects/Section.c:1100
#21 0x00007ffff7f212c0 in objects_section_get_subitem_size (self=self@entry=0x555557188070, item=item@entry=0x5555560e2a30) at core/libplanify.so.0.1.p/Objects/Section.c:1144
#22 0x00007ffff7f212c0 in objects_section_get_subitem_size (self=self@entry=0x555557188070, item=item@entry=0x5555560e2a30) at core/libplanify.so.0.1.p/Objects/Section.c:1144
#23 0x00007ffff7f212c0 in objects_section_get_subitem_size (self=self@entry=0x555557188070, item=item@entry=0x5555560e2a30) at core/libplanify.so.0.1.p/Objects/Section.c:1144
#24 0x00007ffff7f212c0 in objects_section_get_subitem_size (self=self@entry=0x555557188070, item=item@entry=0x5555560e2a30) at core/libplanify.so.0.1.p/Objects/Section.c:1144
#25 0x00007ffff7f212c0 in objects_section_get_subitem_size (self=self@entry=0x555557188070, item=item@entry=0x5555560e2a30) at core/libplanify.so.0.1.p/Objects/Section.c:1144
#26 0x00007ffff7f212c0 in objects_section_get_subitem_size (self=self@entry=0x555557188070, item=item@entry=0x5555560e2a30) at core/libplanify.so.0.1.p/Objects/Section.c:1144