"grunt custom" doesn't work.

"grunt custom" doesn't work.

  1. D:\Code\github\jquery [master]> grunt custom:+ajax,-dimensions,-effects,-offset
  2. path.existsSync is now called `fs.existsSync`.
  3. Running "custom:+ajax" (custom) task
  4. Creating custom build...
  5. Done, without errors.
  6. D:\Code\github\jquery [master]> cd .\dist ; ls
  7.     目录: D:\franckfang\Code\github\jquery\dist
  8. Mode                LastWriteTime     Length Name
  9. ----                -------------     ------ ----
  10. -a---        2012/10/14     17:57          0 .sizecache.json

I don't know why there is nothing in dist.