From dc207be04fd29c9637f6172001cb7e51fe1a3f96 Mon Sep 17 00:00:00 2001
From: "R.I.Pienaar" <rip@devco.net>
Date: Wed, 29 Jan 2020 12:59:21 +0100
Subject: [PATCH] handles 0 length tokens correctly

Without this nats-req '$JS.TEMPLATE..DELETE' '' causes a panic
---
 server/sublist.go | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/server/sublist.go b/server/sublist.go
index 04ff98e9..8c07c97e 100644
--- a/server/sublist.go
+++ b/server/sublist.go
@@ -1190,13 +1190,12 @@ func isSubsetMatch(tokens []string, test string) bool {
 			return true
 		}
 		t1 := tokens[i]
+
 		l = len(t1)
-		if l == 0 {
-			return false
-		}
-		if t1[0] == fwc && l == 1 {
+		if l == 0 || t1[0] == fwc && l == 1 {
 			return false
 		}
+
 		if t1[0] == pwc && len(t1) == 1 {
 			m := t2[0] == pwc && len(t2) == 1
 			if !m {