X-Git-Url: https://git.notmuchmail.org/git?p=notmuch;a=blobdiff_plain;f=lib%2Fthread.cc;h=9847cf8bfc868d6b63e24a8ff56eb2943e997d36;hp=45425056034fca555d8c679d670800872813ba13;hb=1e5b4b72c928d2ed8243be2b4edc20e60e9bd158;hpb=67e368ac7ba84b0ea70356c2bdb3a14018009294

diff --git a/lib/thread.cc b/lib/thread.cc
index 45425056..9847cf8b 100644
--- a/lib/thread.cc
+++ b/lib/thread.cc
@@ -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);
     }