diff -r 9db77d46de79 -r 24ee91ba9aa8 mercurial/store.py
--- a/mercurial/store.py	Mon Jan 06 14:15:40 2025 -0500
+++ b/mercurial/store.py	Sun Jan 05 21:03:17 2025 -0500
@@ -1028,7 +1028,7 @@
         self._dirty = False
         try:
             fp = self.vfs(b'fncache', mode=b'rb')
-        except IOError:
+        except OSError:
             # skip nonexistent file
             self.entries = set()
             return