ruby-on-rails – 如何解决这个错误？ config.gem：未包装的gem

$script/server --debugger
=> Booting Mongrel
=> Rails 2.3.5 application starting on http://0.0.0.0:3000
config.gem: Unpacked gem authlogic-2.1.3 in vendor/gems has no specification file. Run 'rake gems:refresh_specs' to fix this.
=> Debugger enabled
=> Call with -d to detach
=> Ctrl-C to shutdown server

当我运行rake宝石：refresh_specs喜欢它建议我得到另一个错误：

rake aborted!
undefined method `installed_source_index' for #<Gem::SourceIndex:0x100551a58>

关于如何解决这个问题的任何想法？