运行autotest时出现以下错误。奇怪的是，我没有/Library/Ruby/Gems/1.8/文件夹，而是/Library/Ruby/Gems/1.9.1/文件夹。
帮助吗?谢谢。
Invalid gemspec in [/Library/Ruby/Gems/1.8/specifications/heroku-2.8.6.gemspec]: invalid date format in specification: "2011-10-07 00:00:00.000000000Z"
loading autotest/rails_rspec2
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/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/ruby -rrubygems -S /Library/Ruby/Gems/1.8/gems/rspec-core-2.6.4/bin/rspec --tty '/Users/nikeelevet/rails_projects/sample_app/spec/controllers/pages_controller_spec.rb'
Invalid gemspec in [/Library/Ruby/Gems/1.8/specifications/heroku-2.8.6.gemspec]: invalid date format in specification: "2011-10-07 00:00:00.000000000Z"
Invalid gemspec in [/Library/Ruby/Gems/1.8/specifications/heroku-2.8.6.gemspec]: invalid date format in specification: "2011-10-07 00:00:00.000000000Z"
/Users/nikeelevet/rails_projects/sample_app/spec/controllers/pages_controller_spec.rb:20: undefined method `desribe' for #<Class:0x1045bff68> (NoMethodError)
from /Library/Ruby/Gems/1.8/gems/rspec-core-2.6.4/lib/rspec/core/example_group.rb:142:in `module_eval'
from /Library/Ruby/Gems/1.8/gems/rspec-core-2.6.4/lib/rspec/core/example_group.rb:142:in `subclass'
from /Library/Ruby/Gems/1.8/gems/rspec-core-2.6.4/lib/rspec/core/example_group.rb:129:in `describe'
from /Library/Ruby/Gems/1.8/gems/rspec-core-2.6.4/lib/rspec/core/dsl.rb:5:in `describe'
from /Users/nikeelevet/rails_projects/sample_app/spec/controllers/pages_controller_spec.rb:3
from /Library/Ruby/Gems/1.8/gems/rspec-core-2.6.4/lib/rspec/core/configuration.rb:419:in `load'
from /Library/Ruby/Gems/1.8/gems/rspec-core-2.6.4/lib/rspec/core/configuration.rb:419:in `load_spec_files'
from /Library/Ruby/Gems/1.8/gems/rspec-core-2.6.4/lib/rspec/core/configuration.rb:419:in `map'
from /Library/Ruby/Gems/1.8/gems/rspec-core-2.6.4/lib/rspec/core/configuration.rb:419:in `load_spec_files'
from /Library/Ruby/Gems/1.8/gems/rspec-core-2.6.4/lib/rspec/core/command_line.rb:18:in `run'
from /Library/Ruby/Gems/1.8/gems/rspec-core-2.6.4/lib/rspec/core/runner.rb:80:in `run_in_process'
from /Library/Ruby/Gems/1.8/gems/rspec-core-2.6.4/lib/rspec/core/runner.rb:69:in `run'
from /Library/Ruby/Gems/1.8/gems/rspec-core-2.6.4/lib/rspec/core/runner.rb:11:in `autorun'
from /Library/Ruby/Gems/1.8/gems/rspec-core-2.6.4/bin/rspec:4
现在，我可以删除错误信息中指定的宝石了。
为什么不尝试旧版本的autotest和/或heroku版本来检查这个问题是否只是一个bug?
虽然这不是你的问题，但我想向你推荐宝石防护器。有什么理由更喜欢autotest而不是guard吗?
https://github.com/guard/guard