From: Shamil <ashm.tech@proton.me>
Date: Fri, 18 Apr 2025 20:27:10 +0000 (+0300)
Subject: fix: add assertion to ensure 'existing' is not None
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=4b851862598f5791827f9c745de9f5c90fca012c;p=thirdparty%2Fsqlalchemy%2Fsqlalchemy.git

fix: add assertion to ensure 'existing' is not None

Prevented potential issues by asserting that 'existing' is never None.
Added to enforce invariant and improve debugging in edge cases.
---

diff --git a/lib/sqlalchemy/orm/identity.py b/lib/sqlalchemy/orm/identity.py
index f5959cfe15..7649cab7ce 100644
--- a/lib/sqlalchemy/orm/identity.py
+++ b/lib/sqlalchemy/orm/identity.py
@@ -167,6 +167,7 @@ class _WeakInstanceDict(IdentityMap):
         else:
             if existing is state:
                 return None
+            assert existing is not None
             self._manage_removed_state(existing)
 
         self._dict[state.key] = state