816             n = self._nodecache

   816             n = self._nodecache

   817             i = self.index

   817             i = self.index

   818             p = self._nodepos

   818             p = self._nodepos

   819             if p is None:

   819             if p is None:

   820                 p = len(i) - 2

   820                 p = len(i) - 2

   821             for r in xrange(p, -1, -1):

   823             for r in xrange(p, -1, -1):

   822                 v = i[r][7]

   824                 v = i[r][7]

   823                 n[v] = r

   825                 n[v] = r

   824                 if v == node:

   826                 if v == node:

   825                     self._nodepos = r - 1

   827                     self._nodepos = r - 1

  2419         self._chunkclear()

  2421         self._chunkclear()

  2420         for x in xrange(rev, len(self)):

  2422         for x in xrange(rev, len(self)):

  2421             del self.nodemap[self.node(x)]

  2423             del self.nodemap[self.node(x)]

  2422 

  2424 

  2423         del self.index[rev:-1]

  2425         del self.index[rev:-1]

  2424 

  2427 

  2425     def checksize(self):

  2428     def checksize(self):

  2426         expected = 0

  2429         expected = 0

  2427         if len(self):

  2430         if len(self):

  2428             expected = max(0, self.end(len(self) - 1))

  2431             expected = max(0, self.end(len(self) - 1))