notmuch search: Avoid infinite stream of exceptions from "notmuch search"

That is, give a nice error message and exit if no search terms are
provided. Thanks to Priit Laes <plaes@plaes.org> for reporting the
error and providing an early version of the fix.

1 files changed, 4 insertions, 0 deletions

diff --git a/notmuch-search.c b/notmuch-search.c
index f7f9e70c..2b1c0fea 100644
--- a/notmuch-search.c
+++ b/notmuch-search.c
@@ -138,6 +138,10 @@ notmuch_search_command (void *ctx, int argc, char *argv[])
 	fprintf (stderr, "Out of memory.\n");
 	return 1;
     }
+    if (*query_str == '\0') {
+	fprintf (stderr, "Error: notmuch search requires at least one search term.\n");
+	return 1;
+    }
 
     query = notmuch_query_create (notmuch, query_str);
     if (query == NULL) {