From 5315a95c1d3a755147159abfd62847aefe6b83bb Mon Sep 17 00:00:00 2001
From: Louis Dominic <83048873+Kuro-Rui@users.noreply.github.com>
Date: Fri, 6 Jan 2023 22:36:20 +0700
Subject: [PATCH] Delete lib from sys.modules when an exception happens during
 load

---
 redbot/core/bot.py | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/redbot/core/bot.py b/redbot/core/bot.py
index f94324783b5c..a3a7205cfd0d 100644
--- a/redbot/core/bot.py
+++ b/redbot/core/bot.py
@@ -1630,7 +1630,11 @@ async def load_extension(self, spec: ModuleSpec):
 
         lib = module_from_spec(spec)
         sys.modules[name] = lib
-        spec.loader.exec_module(lib)
+        try:
+            spec.loader.exec_module(lib)
+        except Exception:
+            del sys.modules[name]
+            raise
 
         if not hasattr(lib, "setup"):
             del lib
@@ -1638,7 +1642,8 @@ async def load_extension(self, spec: ModuleSpec):
 
         try:
             await lib.setup(self)
-        except Exception as e:
+        except Exception:
+            del sys.modules[name]
             await self._remove_module_references(lib.__name__)
             await self._call_module_finalizers(lib, name)
             raise