From ecbb29e8cea404faab2ef55b06431942ee329941 Mon Sep 17 00:00:00 2001
From: David Bremner <david@tethera.net>
Date: Thu, 23 Jan 2014 08:24:01 -0400
Subject: notmuch-show: detect NULL pointer returned from
 notmuch_query_search_threads

We want to return an error status, not 0 or (worse) segfault.
---
 notmuch-show.c    | 6 +++++-
 test/T520-show.sh | 1 -
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/notmuch-show.c b/notmuch-show.c
index 528694be..d416fbd5 100644
--- a/notmuch-show.c
+++ b/notmuch-show.c
@@ -1015,9 +1015,13 @@ do_show (void *ctx,
     notmuch_messages_t *messages;
     notmuch_status_t status, res = NOTMUCH_STATUS_SUCCESS;
 
+    threads = notmuch_query_search_threads (query);
+    if (! threads)
+	return 1;
+
     sp->begin_list (sp);
 
-    for (threads = notmuch_query_search_threads (query);
+    for ( ;
 	 notmuch_threads_valid (threads);
 	 notmuch_threads_move_to_next (threads))
     {
diff --git a/test/T520-show.sh b/test/T520-show.sh
index bdd9d716..0657c993 100755
--- a/test/T520-show.sh
+++ b/test/T520-show.sh
@@ -6,7 +6,6 @@ test_description='"notmuch show"'
 add_email_corpus
 
 test_begin_subtest "exit code for show invalid query"
-test_subtest_known_broken
 notmuch show foo..
 exit_code=$?
 test_expect_equal 1 $exit_code
-- 
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