From ce6b9a6f48dbbd28676913b1902225dc9f86f891 Mon Sep 17 00:00:00 2001
From: Adam Turner <9087854+aa-turner@users.noreply.github.com>
Date: Fri, 17 Jan 2025 00:28:34 +0000
Subject: [PATCH] __[gs]etstate__

---
 sphinx/util/inventory.py | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/sphinx/util/inventory.py b/sphinx/util/inventory.py
index ebb47bd0283..aee8aa3cdb8 100644
--- a/sphinx/util/inventory.py
+++ b/sphinx/util/inventory.py
@@ -263,6 +263,16 @@ def __delattr__(self, key: str) -> NoReturn:
         msg = '_InventoryItem is immutable'
         raise AttributeError(msg)
 
+    def __getstate__(self) -> tuple[str, str, str, str]:
+        return self.project_name, self.project_version, self.uri, self.display_name
+
+    def __setstate__(self, state: tuple[str, str, str, str]) -> None:
+        project_name, project_version, uri, display_name = state
+        object.__setattr__(self, 'project_name', project_name)
+        object.__setattr__(self, 'project_version', project_version)
+        object.__setattr__(self, 'uri', uri)
+        object.__setattr__(self, 'display_name', display_name)
+
     def __getitem__(self, key: int | slice) -> str | tuple[str, ...]:
         warnings.warn(
             'The tuple interface for _InventoryItem objects is deprecated.',