--- a/hgext3rd/evolve/obsdiscovery.py	Thu Sep 13 17:09:34 2018 +0200
+++ b/hgext3rd/evolve/obsdiscovery.py	Thu Sep 13 17:09:44 2018 +0200
@@ -612,7 +612,7 @@
             return
         try:
             return self._trysave(repo)
-        except (sqlite3.DatabaseError, sqlite3.OperationalError, sqlite3.IntegrityError) as exc:
+        except (IOError, OSError, sqlite3.DatabaseError, sqlite3.OperationalError, sqlite3.IntegrityError) as exc:
             # Catch error that may arise under stress
             #
             # operational error catch read-only and locked database