diff -r 9db77d46de79 -r 24ee91ba9aa8 mercurial/configuration/rcutil.py
--- a/mercurial/configuration/rcutil.py	Mon Jan 06 14:15:40 2025 -0500
+++ b/mercurial/configuration/rcutil.py	Sun Jan 05 21:03:17 2025 -0500
@@ -144,7 +144,7 @@
             hgvfs = vfs.vfs(os.path.join(path, b".hg"))
             sharedvfs = localrepo._getsharedvfs(hgvfs, requirements)
             return [sharedvfs.join(b"hgrc")]
-    except IOError:
+    except OSError:
         pass
     return []