diff -r 53e9422a9b45 -r 2e726c934fcd hgext/rebase.py
--- a/hgext/rebase.py	Tue May 31 21:16:17 2022 +0200
+++ b/hgext/rebase.py	Tue May 31 22:50:01 2022 +0200
@@ -15,7 +15,6 @@
 '''
 
 
-import errno
 import os
 
 from mercurial.i18n import _
@@ -1940,9 +1939,7 @@
         f = repo.vfs(b"last-message.txt")
         collapsemsg = f.readline().strip()
         f.close()
-    except IOError as err:
-        if err.errno != errno.ENOENT:
-            raise
+    except FileNotFoundError:
         if isabort:
             # Oh well, just abort like normal
             collapsemsg = b''