From e790367b1ed54eeea98937e67c59d80432a177d2 Mon Sep 17 00:00:00 2001
From: Damien Elmes <gpg@ankiweb.net>
Date: Mon, 16 Mar 2020 13:16:43 +1000
Subject: [PATCH] ensure id list not empty

---
 rslib/src/search/parser.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/rslib/src/search/parser.rs b/rslib/src/search/parser.rs
index b3768aaae..e102070a2 100644
--- a/rslib/src/search/parser.rs
+++ b/rslib/src/search/parser.rs
@@ -247,7 +247,7 @@ fn search_node_for_text_with_argument<'a>(
 /// ensure a list of ids contains only numbers and commas, returning unchanged if true
 /// used by nid: and cid:
 fn check_id_list(s: Cow<str>) -> ParseResult<Cow<str>> {
-    if s.as_bytes().iter().any(|&c| !is_digit(c) && c != b',') {
+    if s.is_empty() || s.as_bytes().iter().any(|&c| !is_digit(c) && c != b',') {
         Err(ParseError {})
     } else {
         Ok(s)