From d6791111f30d814bed876514a2793eb988e2a3d8 Mon Sep 17 00:00:00 2001
From: Fixator10 <fixator10@gmail.com>
Date: Mon, 28 Sep 2020 15:14:49 +0400
Subject: [PATCH] fix `[p]set nickname` when no nickname specified (#4451)

---
 redbot/core/core_commands.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/redbot/core/core_commands.py b/redbot/core/core_commands.py
index c3bb97778..bf4b00a0b 100644
--- a/redbot/core/core_commands.py
+++ b/redbot/core/core_commands.py
@@ -1953,7 +1953,7 @@ class Core(commands.commands._RuleDropper, commands.Cog, CoreLogic):
     async def _nickname(self, ctx: commands.Context, *, nickname: str = None):
         """Sets [botname]'s nickname."""
         try:
-            if len(nickname) > 32:
+            if nickname and len(nickname) > 32:
                 await ctx.send(_("Failed to change nickname. Must be 32 characters or fewer."))
                 return
             await ctx.guild.me.edit(nick=nickname)