localrepo: delete _phaserev when invalidating caches

mercurial/localrepo.py

@@ -879,11 +879,15 b' class localrepository(repo.repository):'
         return 0
 
     def invalidatecaches(self):
+        def delcache(name):
         try:
-            delattr(self, '_tagscache')
+                delattr(self, name)
         except AttributeError:
             pass
 
+        delcache('_tagscache')
+        delcache('_phaserev')
+
         self._branchcache = None # in UTF-8
         self._branchcachetip = None