[PATCH 2/2] lib: clamp return value of g_mime_utils_header_decode_date to >=0

[David Bremner]

For reasons not completely understood at this time, gmime (as of
2.6.22) is returning a date before 1900 on bad date input. Since this
confuses some other software, we clamp such dates to 0,
i.e. 1970-01-01.
---
 lib/message.cc | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/lib/message.cc b/lib/message.cc
index 007f1171..8a8a25b4 100644
--- a/lib/message.cc
+++ b/lib/message.cc
@@ -1034,10 +1034,15 @@ _notmuch_message_set_header_values (notmuch_message_t *message,
 
     /* GMime really doesn't want to see a NULL date, so protect its
      * sensibilities. */
-    if (date == NULL || *date == '\0')
+    if (date == NULL || *date == '\0') {
 	time_value = 0;
-    else
+    } else {
 	time_value = g_mime_utils_header_decode_date (date, NULL);
+	/*
+	 * Workaround for https://bugzilla.gnome.org/show_bug.cgi?id=779923
+	 */
+	time_value = (time_value < 0) ? 0 : time_value;
+    }
 
     message->doc.add_value (NOTMUCH_VALUE_TIMESTAMP,
 			    Xapian::sortable_serialise (time_value));
-- 
2.11.0