[evolution] Crash under message-list.c:free_message_info_data()

[Milan Crha <mcrha src gnome org>]

commit c9d48f4a4b16877ccd9aa73a51d61f2931e22577
Author: Milan Crha <mcrha redhat com>
Date:   Tue Jan 9 11:55:04 2018 +0100

    Crash under message-list.c:free_message_info_data()
    
    Reported downstream at:
    https://bugzilla.redhat.com/show_bug.cgi?id=1485982

 src/mail/message-list.c |   34 ++++++++++++++++++++++------------
 1 files changed, 22 insertions(+), 12 deletions(-)
---
diff --git a/src/mail/message-list.c b/src/mail/message-list.c
index f460d24..4553c70 100644
--- a/src/mail/message-list.c
+++ b/src/mail/message-list.c
@@ -145,6 +145,8 @@ struct _RegenData {
 
        EActivity *activity;
        MessageList *message_list;
+       ETableSortInfo *sort_info;
+       ETableHeader *full_header;
 
        gchar *search;
 
@@ -467,6 +469,9 @@ regen_data_new (MessageList *message_list,
        RegenData *regen_data;
        EActivity *activity;
        EMailSession *session;
+       ETreeTableAdapter *adapter;
+
+       adapter = e_tree_get_table_adapter (E_TREE (message_list));
 
        activity = e_activity_new ();
        e_activity_set_cancellable (activity, cancellable);
@@ -479,6 +484,16 @@ regen_data_new (MessageList *message_list,
        regen_data->folder = message_list_ref_folder (message_list);
        regen_data->last_row = -1;
 
+       if (adapter) {
+               regen_data->sort_info = e_tree_table_adapter_get_sort_info (adapter);
+               regen_data->full_header = e_tree_table_adapter_get_header (adapter);
+
+               if (regen_data->sort_info)
+                       g_object_ref (regen_data->sort_info);
+               if (regen_data->full_header)
+                       g_object_ref (regen_data->full_header);
+       }
+
        if (message_list->just_set_folder)
                regen_data->select_uid = g_strdup (message_list->cursor_uid);
 
@@ -513,6 +528,8 @@ regen_data_unref (RegenData *regen_data)
 
                g_clear_object (&regen_data->activity);
                g_clear_object (&regen_data->message_list);
+               g_clear_object (&regen_data->sort_info);
+               g_clear_object (&regen_data->full_header);
 
                g_free (regen_data->search);
 
@@ -4904,6 +4921,8 @@ message_list_set_folder (MessageList *message_list,
                g_object_ref (folder);
        }
 
+       mail_regen_cancel (message_list);
+
        g_free (message_list->search);
        message_list->search = NULL;
 
@@ -4918,8 +4937,6 @@ message_list_set_folder (MessageList *message_list,
        /* reset the normalised sort performance hack */
        g_hash_table_remove_all (message_list->normalised_hash);
 
-       mail_regen_cancel (message_list);
-
        if (message_list->priv->folder != NULL)
                save_tree_state (message_list, message_list->priv->folder);
 
@@ -5844,12 +5861,11 @@ free_message_info_data (gpointer uid,
 
 static void
 ml_sort_uids_by_tree (MessageList *message_list,
+                     ETableSortInfo *sort_info,
+                     ETableHeader *full_header,
                       GPtrArray *uids,
                       GCancellable *cancellable)
 {
-       ETreeTableAdapter *adapter;
-       ETableSortInfo *sort_info;
-       ETableHeader *full_header;
        CamelFolder *folder;
        struct sort_array_data sort_data;
        guint i, len;
@@ -5862,12 +5878,6 @@ ml_sort_uids_by_tree (MessageList *message_list,
        folder = message_list_ref_folder (message_list);
        g_return_if_fail (folder != NULL);
 
-       adapter = e_tree_get_table_adapter (E_TREE (message_list));
-       g_return_if_fail (adapter != NULL);
-
-       sort_info = e_tree_table_adapter_get_sort_info (adapter);
-       full_header = e_tree_table_adapter_get_header (adapter);
-
        if (!sort_info || uids->len == 0 || !full_header || e_table_sort_info_sorting_get_count (sort_info) 
== 0) {
                camel_folder_sort_uids (folder, uids);
                g_object_unref (folder);
@@ -6143,7 +6153,7 @@ message_list_regen_thread (GSimpleAsyncResult *simple,
        if (regen_data->group_by_threads) {
                CamelFolderThread *thread_tree;
 
-               ml_sort_uids_by_tree (message_list, uids, cancellable);
+               ml_sort_uids_by_tree (message_list, regen_data->sort_info, regen_data->full_header, uids, 
cancellable);
 
                thread_tree = message_list_ref_thread_tree (message_list);