--- a/hgext3rd/evolve/stablerangecache.py	Mon Aug 27 00:18:06 2018 +0200
+++ b/hgext3rd/evolve/stablerangecache.py	Mon Aug 27 00:28:19 2018 +0200
@@ -223,6 +223,12 @@
         return con
 
     def _save(self, repo):
+        try:
+            return self._trysave(repo)
+        except sqlite3.OperationalError as exc:
+            repo.ui.log('evoext-cache', 'error while saving new data: %s' % exc)
+
+    def _trysave(self, repo):
         repo = repo.unfiltered()
         repo.depthcache.save(repo)
         repo.stablesort.save(repo)