From 15f07ac1e56a43de9466d1d845eb4ea0cbd72be9 Mon Sep 17 00:00:00 2001
From: CoolCat467 <52022020+CoolCat467@users.noreply.github.com>
Date: Sat, 5 Aug 2023 12:08:23 -0500
Subject: [PATCH] Add slots to exceptions

---
 trio/_core/_exceptions.py | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/trio/_core/_exceptions.py b/trio/_core/_exceptions.py
index bdc7b31c21..d4e74aec86 100644
--- a/trio/_core/_exceptions.py
+++ b/trio/_core/_exceptions.py
@@ -14,6 +14,8 @@ class TrioInternalError(Exception):
 
     """
 
+    __slots__ = ()
+
 
 class RunFinishedError(RuntimeError):
     """Raised by `trio.from_thread.run` and similar functions if the
@@ -21,10 +23,14 @@ class RunFinishedError(RuntimeError):
 
     """
 
+    __slots__ = ()
+
 
 class WouldBlock(Exception):
     """Raised by ``X_nowait`` functions if ``X`` would block."""
 
+    __slots__ = ()
+
 
 class Cancelled(BaseException, metaclass=NoPublicConstructor):
     """Raised by blocking calls if the surrounding scope has been cancelled.
@@ -59,6 +65,8 @@ class Cancelled(BaseException, metaclass=NoPublicConstructor):
 
     """
 
+    __slots__ = ()
+
     def __str__(self) -> str:
         return "Cancelled"
 
@@ -73,6 +81,8 @@ class BusyResourceError(Exception):
 
     """
 
+    __slots__ = ()
+
 
 class ClosedResourceError(Exception):
     """Raised when attempting to use a resource after it has been closed.
@@ -86,6 +96,8 @@ class ClosedResourceError(Exception):
 
     """
 
+    __slots__ = ()
+
 
 class BrokenResourceError(Exception):
     """Raised when an attempt to use a resource fails due to external
@@ -102,6 +114,8 @@ class BrokenResourceError(Exception):
 
     """
 
+    __slots__ = ()
+
 
 class EndOfChannel(Exception):
     """Raised when trying to receive from a :class:`trio.abc.ReceiveChannel`
@@ -110,3 +124,5 @@ class EndOfChannel(Exception):
     This is analogous to an "end-of-file" condition, but for channels.
 
     """
+
+    __slots__ = ()