--- a/hgext3rd/evolve/depthcache.py	Tue Aug 06 11:17:38 2019 +0200
+++ b/hgext3rd/evolve/depthcache.py	Tue Aug 06 11:26:29 2019 +0200
@@ -79,7 +79,7 @@
 
         @localrepo.unfilteredmethod
         def destroyed(self):
-            if 'depthcache' in vars(self):
+            if r'depthcache' in vars(self):
                 self.depthcache.clear()
             super(depthcacherepo, self).destroyed()