commitablectx: move _flagfunc from workingctx

mercurial/context.py

@@ -897,6 +897,10 b' class commitablectx(basectx):'
 
         return func
 
+    @propertycache
+    def _flagfunc(self):
+        return self._repo.dirstate.flagfunc(self._buildflagfunc)
+
 class workingctx(commitablectx):
     """A workingctx object makes access to data related to
     the current working directory convenient.
@@ -911,10 +915,6 b' class workingctx(commitablectx):'
         super(workingctx, self).__init__(repo, text, user, date, extra, changes)
 
     @propertycache
-    def _flagfunc(self):
-        return self._repo.dirstate.flagfunc(self._buildflagfunc)
-
-    @propertycache
     def _manifest(self):
         """generate a manifest corresponding to the working directory"""