[evolution-data-server] I#365 - Calendar: Crash on local calandar file change

[Milan Crha <mcrha src gnome org>]

commit 84a05c8165e322c23b2dea88c0006dd325b673b7
Author: Milan Crha <mcrha redhat com>
Date:   Thu Nov 4 17:00:20 2021 +0100

    I#365 - Calendar: Crash on local calandar file change
    
    Closes https://gitlab.gnome.org/GNOME/evolution-data-server/-/issues/365

 src/calendar/backends/file/e-cal-backend-file.c | 1 +
 src/calendar/backends/http/e-cal-backend-http.c | 7 ++++++-
 src/calendar/libecal/e-cal-component.c          | 2 ++
 3 files changed, 9 insertions(+), 1 deletion(-)
---
diff --git a/src/calendar/backends/file/e-cal-backend-file.c b/src/calendar/backends/file/e-cal-backend-file.c
index f40bf807c..79ae53632 100644
--- a/src/calendar/backends/file/e-cal-backend-file.c
+++ b/src/calendar/backends/file/e-cal-backend-file.c
@@ -904,6 +904,7 @@ scan_vcalendar (ECalBackendFile *cbfile)
                        if (e_cal_component_set_icalcomponent (comp, icomp)) {
                                /* Thus it's not freed while being used in the 'comp' */
                                g_object_ref (icomp);
+                               i_cal_object_set_owner (I_CAL_OBJECT (icomp), G_OBJECT (priv->vcalendar));
 
                                check_dup_uid (cbfile, comp);
 
diff --git a/src/calendar/backends/http/e-cal-backend-http.c b/src/calendar/backends/http/e-cal-backend-http.c
index a7e930ca0..bfe9b4554 100644
--- a/src/calendar/backends/http/e-cal-backend-http.c
+++ b/src/calendar/backends/http/e-cal-backend-http.c
@@ -477,13 +477,18 @@ ecb_http_get_changes_sync (ECalMetaBackend *meta_backend,
        } else {
                iter = i_cal_component_begin_component (maincomp, I_CAL_VCALENDAR_COMPONENT);
                subcomp = i_cal_comp_iter_deref (iter);
+               if (subcomp)
+                       i_cal_object_set_owner (I_CAL_OBJECT (subcomp), G_OBJECT (maincomp));
        }
 
        while (subcomp && success) {
                ICalComponent *next_subcomp = NULL;
 
-               if (iter)
+               if (iter) {
                        next_subcomp = i_cal_comp_iter_next (iter);
+                       if (next_subcomp)
+                               i_cal_object_set_owner (I_CAL_OBJECT (next_subcomp), G_OBJECT (maincomp));
+               }
 
                if (i_cal_component_isa (subcomp) == I_CAL_VCALENDAR_COMPONENT) {
                        success = e_cal_meta_backend_gather_timezones_sync (meta_backend, subcomp, TRUE, 
cancellable, error);
diff --git a/src/calendar/libecal/e-cal-component.c b/src/calendar/libecal/e-cal-component.c
index a3dddcc8f..c7629813a 100644
--- a/src/calendar/libecal/e-cal-component.c
+++ b/src/calendar/libecal/e-cal-component.c
@@ -95,6 +95,8 @@ foreach_subcomponent (ICalComponent *icalcomp,
        while (subcomp) {
                ICalComponent *next_subcomp;
 
+               i_cal_object_set_owner (I_CAL_OBJECT (subcomp), G_OBJECT (icalcomp));
+
                next_subcomp = i_cal_comp_iter_next (iter);
 
                if (!func (icalcomp, subcomp, user_data)) {