Ruby 1.8.x Rails 2.x 的 “uninitialized constant ActiveSupport::Dependencies::Mutex (NameError)&

坑爹的異常。

在 Ruby 安裝目錄下的 bin 目錄下找到 rails 檔案：比如：C:\Ruby187\bin
修改 rails，在 require 'rubygems' 之後加上 require 'thread'

#!C:/Ruby187/bin/ruby.exe## This file was generated by RubyGems.## The application 'rails' is installed as part of a gem, and# this file is here to facilitate running it.#require 'thread'require 'rubygems'version = ">= 0"if ARGV.first =~ /^_(.*)_$/ and Gem::Version.correct? $1 then  version = $1  ARGV.shiftendgem 'rails', versionload Gem.bin_path('rails', 'rails', version)

接下來運行 rails SomeApp 產生 Rails 應用之後，再啟動rake：ruby Script/Sever 還會出上面的錯誤，則需要在
Ruby 安裝目錄下，尋找 environment.rb，boot.rb 檔案，同樣在前面加上 require 'thread'