Fix AttributeError with cog special methods

Discord.py's internals use the __func__ attribute of special methods
(cog_command_error, cog_check, cog_before_invoke, cog_after_invoke).
Therefore the methods must be bound methods rather than static so that
the attribute exists.

2 files changed, 4 insertions, 4 deletions

diff --git a/bot/cogs/moderation.py b/bot/cogs/moderation.py
index f2ff7e6b2..2ad5b96f4 100644
--- a/bot/cogs/moderation.py
+++ b/bot/cogs/moderation.py
@@ -1282,8 +1282,8 @@ class Moderation(Scheduler, Cog):
 
     # endregion
 
-    @staticmethod
-    async def cog_command_error(ctx: Context, error: Exception) -> None:
+    # This cannot be static (must have a __func__ attribute).
+    async def cog_command_error(self, ctx: Context, error: Exception) -> None:
         """Send a notification to the invoking context on a Union failure."""
         if isinstance(error, BadUnionArgument):
             if User in error.converters:
diff --git a/bot/cogs/verification.py b/bot/cogs/verification.py
index b0c250603..f0a099f27 100644
--- a/bot/cogs/verification.py
+++ b/bot/cogs/verification.py
@@ -141,8 +141,8 @@ class Verification(Cog):
             f"{ctx.author.mention} Unsubscribed from <#{Channels.announcements}> notifications."
         )
 
-    @staticmethod
-    async def cog_command_error(ctx: Context, error: Exception) -> None:
+    # This cannot be static (must have a __func__ attribute).
+    async def cog_command_error(self, ctx: Context, error: Exception) -> None:
         """Check for & ignore any InChannelCheckFailure."""
         if isinstance(error, InChannelCheckFailure):
             error.handled = True