X-Git-Url: https://git.notmuchmail.org/git?p=notmuch;a=blobdiff_plain;f=lib%2Fthread.cc;h=561ca5bec783cd9a014563412acac76f5205dac0;hp=45425056034fca555d8c679d670800872813ba13;hb=86cbd215eb67d7b996c977352a50e70c101cb641;hpb=67e368ac7ba84b0ea70356c2bdb3a14018009294

diff --git a/lib/thread.cc b/lib/thread.cc
index 45425056..561ca5be 100644
--- a/lib/thread.cc
+++ b/lib/thread.cc
@@ -13,7 +13,7 @@
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see http://www.gnu.org/licenses/ .
+ * along with this program.  If not, see https://www.gnu.org/licenses/ .
  *
  * Author: Carl Worth <cworth@cworth.org>
  */
@@ -251,8 +251,8 @@ _thread_add_message (notmuch_thread_t *thread,
 		 term != NULL;
 		 term = term->next)
 	    {
-		/* We ignore initial 'K'. */
-		if (strcmp(tag, (term->string + 1)) == 0) {
+		/* Check for an empty string, and then ignore initial 'K'. */
+		if (*(term->string) && strcmp(tag, (term->string + 1)) == 0) {
 		    message_excluded = TRUE;
 		    break;
 		}
@@ -353,10 +353,8 @@ _thread_add_matched_message (notmuch_thread_t *thread,
 {
     time_t date;
     notmuch_message_t *hashed_message;
-    const char *cur_subject;
 
     date = notmuch_message_get_date (message);
-    cur_subject = notmuch_thread_get_subject(thread);
 
     if (date < thread->oldest || ! thread->matched_messages) {
 	thread->oldest = date;
@@ -366,6 +364,7 @@ _thread_add_matched_message (notmuch_thread_t *thread,
 
     if (date > thread->newest || ! thread->matched_messages) {
 	thread->newest = date;
+	const char *cur_subject = notmuch_thread_get_subject(thread);
 	if (sort != NOTMUCH_SORT_OLDEST_FIRST || EMPTY_STRING(cur_subject))
 	    _thread_set_subject_from_message (thread, message);
     }
@@ -448,6 +447,7 @@ _notmuch_thread_create (void *ctx,
 
     notmuch_messages_t *messages;
     notmuch_message_t *message;
+    notmuch_status_t status;
 
     seed_message = _notmuch_message_create (local, notmuch, seed_doc_id, NULL);
     if (! seed_message)
@@ -505,7 +505,11 @@ _notmuch_thread_create (void *ctx,
      * oldest or newest subject is desired. */
     notmuch_query_set_sort (thread_id_query, NOTMUCH_SORT_OLDEST_FIRST);
 
-    for (messages = notmuch_query_search_messages (thread_id_query);
+    status = notmuch_query_search_messages (thread_id_query, &messages);
+    if (status)
+	goto DONE;
+
+    for (;
 	 notmuch_messages_valid (messages);
 	 notmuch_messages_move_to_next (messages))
     {