Pathname's realpath method was not properly handling drive letters in Windows, causing Rails initialization to fail in Edge (1.2.3.x) with errors like:
C:/jruby/jruby-1.0.1/lib/ruby/1.8/pathname.rb:420:in `realpath_rec': No such file or directory - C:/railstest/C: (Errno::ENOENT)
from C:/jruby/jruby-1.0.1/lib/ruby/1.8/pathname.rb:453:in `realpath'
from C:/jruby/jruby-1.0.1/lib/ruby/gems/1.8/gems/rails-18.104.22.16805/lib/initializer.rb:494:in `set_root_path!'
from C:/jruby/jruby-1.0.1/lib/ruby/gems/1.8/gems/rails-22.214.171.12405/lib/initializer.rb:459:in `initialize'
from ./script/../config/boot.rb:44:in `new'
from ./script/../config/boot.rb:44:in `run'
from :1:in `require'
attached test shows failure in windows, patch fixes.