From 52962f1b97fc081c96b6bbe11b5b9f1fe4c848af Mon Sep 17 00:00:00 2001
From: Ske <voltasalt@gmail.com>
Date: Fri, 19 Jul 2019 02:14:46 +0200
Subject: [PATCH] Bounds check proxy tags before extracting inner message

---
 PluralKit.Bot/Services/ProxyService.cs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/PluralKit.Bot/Services/ProxyService.cs b/PluralKit.Bot/Services/ProxyService.cs
index eb284ae9..b7d1f367 100644
--- a/PluralKit.Bot/Services/ProxyService.cs
+++ b/PluralKit.Bot/Services/ProxyService.cs
@@ -72,7 +72,7 @@ namespace PluralKit.Bot
                 var prefix = potential.Member.Prefix ?? "";
                 var suffix = potential.Member.Suffix ?? "";
 
-                if (message.StartsWith(prefix) && message.EndsWith(suffix)) {
+                if (message.Length >= prefix.Length + suffix.Length && message.StartsWith(prefix) && message.EndsWith(suffix)) {
                     var inner = message.Substring(prefix.Length, message.Length - prefix.Length - suffix.Length);
                     if (leadingMention != null) inner = $"{leadingMention} {inner}";
                     return new ProxyMatch { Member = potential.Member, System = potential.System, InnerText = inner };