From 6e378fb2536f571ab62fd270a3f951ce56c47c59 Mon Sep 17 00:00:00 2001
From: Christian Heller <c.heller@plomlompom.de>
Date: Fri, 26 Sep 2025 01:44:07 +0200
Subject: [PATCH] Avoid mutables in class attribute defaults.

---
 src/ircplom/client.py | 8 ++++++--
 src/test.txt          | 8 ++++++++
 2 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/src/ircplom/client.py b/src/ircplom/client.py
index b2eca33..1473807 100644
--- a/src/ircplom/client.py
+++ b/src/ircplom/client.py
@@ -636,14 +636,18 @@ class _UpdatingIsupportDict(_UpdatingDict[str]):
 
 
 class _ClientDb(_Clearable, _UpdatingAttrsMixin, SharedClientDbFields):
-    _updates_cache: dict[tuple[str, ...], Any] = {}
-    _keep_on_clear = set(IrcConnSetup.__annotations__.keys())
+    _updates_cache: dict[tuple[str, ...], Any]
+    _keep_on_clear = frozenset(IrcConnSetup.__annotations__.keys())
     caps: _UpdatingDict[_UpdatingServerCapability]
     channels: _UpdatingChannelsDict
     isupport: _UpdatingIsupportDict
     motd: _UpdatingCompletableStringsOrdered
     users: _UpdatingUsersDict
 
+    def __init__(self, **kwargs) -> None:
+        self._updates_cache = {}
+        super().__init__(**kwargs)
+
     def __getattribute__(self, key: str):
         attr = super().__getattribute__(key)
         if key == 'channels' and attr._create_if_none is None\
diff --git a/src/test.txt b/src/test.txt
index 7c1c154..c691572 100644
--- a/src/test.txt
+++ b/src/test.txt
@@ -381,10 +381,14 @@
 
 # test setting up second client, but 432 irrecoverably
 > /connect baz.bar.foo ?foo foo:foo
+, $ DISCONNECTED
 8 $ isupport cleared
 8 $ isupport:CHANTYPES set to: [#&]
 8 $ isupport:PREFIX set to: [(ov)@+]
 8 $ isupport:USERLEN set to: [10]
+8 $ caps cleared
+8 $ users cleared
+8 $ channels cleared
 8 $ hostname set to: [baz.bar.foo]
 8 $ port set to: [-1]
 8 $ nick_wanted set to: [?foo]
@@ -408,10 +412,14 @@
 
 # test failing third connection
 > /connect baz.baz.baz baz baz:baz
+, $ DISCONNECTED
 9 $ isupport cleared
 9 $ isupport:CHANTYPES set to: [#&]
 9 $ isupport:PREFIX set to: [(ov)@+]
 9 $ isupport:USERLEN set to: [10]
+9 $ caps cleared
+9 $ users cleared
+9 $ channels cleared
 9 $ hostname set to: [baz.baz.baz]
 9 $ port set to: [-1]
 9 $ nick_wanted set to: [baz]
-- 
2.30.2