Ruby: stack level too deep (SystemStackError)

[Chloe]

I may have found something. I added -d to the rails script and it printed 
this:

Chloe@dumbopc /cygdrive/c/Sites/railsinstaller_demo
$ rails -v
Exception `LoadError' at /usr/lib/ruby/site_ruby/1.9.1/rubygems.rb:1264 - 
cannot load such file -- rubygems/defaults/operating_system
Exception `LoadError' at /usr/lib/ruby/site_ruby/1.9.1/rubygems.rb:1273 - 
cannot load such file -- rubygems/defaults/ruby
Exception `NoMethodError' at 
/usr/lib/ruby/site_ruby/1.9.1/rubygems/specification.rb:1495 - undefined 
method `to_ary' for #<Gem::Specification name=rake version=0.9.2.2>
Exception `NoMethodError' at 
/usr/lib/ruby/site_ruby/1.9.1/rubygems/specification.rb:1495 - undefined 
method `to_ary' for #<Gem::Specification name=rake version=10.0.3>
Exception `NoMethodError' at 
/usr/lib/ruby/site_ruby/1.9.1/rubygems/specification.rb:1495 - undefined 
method `to_ary' for #<Gem::Specification name=json version=1.7.5>
Exception `NoMethodError' at 
/usr/lib/ruby/site_ruby/1.9.1/rubygems/specification.rb:1495 - undefined 
method `to_ary' for #<Gem::Specification name=json version=1.7.6>
Exception `NoMethodError' at 
/usr/lib/ruby/site_ruby/1.9.1/rubygems/specification.rb:1495 - undefined 
method `to_ary' for #<Gem::Specification name=rake version=0.9.2.2>
Exception `NoMethodError' at 
/usr/lib/ruby/site_ruby/1.9.1/rubygems/specification.rb:1495 - undefined 
method `to_ary' for #<Gem::Specification name=rake version=10.0.3>
Exception `NoMethodError' at 
/usr/lib/ruby/site_ruby/1.9.1/rubygems/specification.rb:1495 - undefined 
method `to_ary' for #<Gem::Specification name=json version=1.7.5>
Exception `NoMethodError' at 
/usr/lib/ruby/site_ruby/1.9.1/rubygems/specification.rb:1495 - undefined 
method `to_ary' for #<Gem::Specification name=json version=1.7.6>
Exception `NoMethodError' at 
/usr/lib/ruby/site_ruby/1.9.1/rubygems/specification.rb:1495 - undefined 
method `to_ary' for #<Gem::Specification name=rake version=0.9.2.2>
Exception `NoMethodError' at 
/usr/lib/ruby/site_ruby/1.9.1/rubygems/specification.rb:1495 - undefined 
method `to_ary' for #<Gem::Specification name=rake version=10.0.3>
Exception `NoMethodError' at 
/usr/lib/ruby/site_ruby/1.9.1/rubygems/specification.rb:1495 - undefined 
method `to_ary' for #<Gem::Specification name=json version=1.7.5>
Exception `NoMethodError' at 
/usr/lib/ruby/site_ruby/1.9.1/rubygems/specification.rb:1495 - undefined 
method `to_ary' for #<Gem::Specification name=json version=1.7.6>
Exception `NoMethodError' at 
/usr/lib/ruby/site_ruby/1.9.1/rubygems/specification.rb:1495 - undefined 
method `to_ary' for #<Gem::Specification name=rake version=0.9.2.2>
Exception `NoMethodError' at 
/usr/lib/ruby/site_ruby/1.9.1/rubygems/specification.rb:1495 - undefined 
method `to_ary' for #<Gem::Specification name=rake version=10.0.3>
Exception `NoMethodError' at 
/usr/lib/ruby/site_ruby/1.9.1/rubygems/specification.rb:1495 - undefined 
method `to_ary' for #<Gem::Specification name=json version=1.7.5>
Exception `NoMethodError' at 
/usr/lib/ruby/site_ruby/1.9.1/rubygems/specification.rb:1495 - undefined 
method `to_ary' for #<Gem::Specification name=json version=1.7.6>
Exception `NoMethodError' at 
/usr/lib/ruby/site_ruby/1.9.1/rubygems/specification.rb:1495 - undefined 
method `to_ary' for #<Gem::Specification name=rake version=0.9.2.2>
Exception `NoMethodError' at 
/usr/lib/ruby/site_ruby/1.9.1/rubygems/specification.rb:1495 - undefined 
method `to_ary' for #<Gem::Specification name=rake version=10.0.3>
Exception `NoMethodError' at 
/usr/lib/ruby/site_ruby/1.9.1/rubygems/specification.rb:1495 - undefined 
method `to_ary' for #<Gem::Specification name=json version=1.7.5>
Exception `NoMethodError' at 
/usr/lib/ruby/site_ruby/1.9.1/rubygems/specification.rb:1495 - undefined 
method `to_ary' for #<Gem::Specification name=json version=1.7.6>
Exception `NoMethodError' at 
/usr/lib/ruby/site_ruby/1.9.1/rubygems/specification.rb:1495 - undefined 
method `to_ary' for #<Gem::Specification name=rake version=0.9.2.2>
Exception `NoMethodError' at 
/usr/lib/ruby/site_ruby/1.9.1/rubygems/specification.rb:1495 - undefined 
method `to_ary' for #<Gem::Specification name=rake version=10.0.3>
Exception `NoMethodError' at 
/usr/lib/ruby/site_ruby/1.9.1/rubygems/specification.rb:1495 - undefined 
method `to_ary' for #<Gem::Specification name=json version=1.7.5>
Exception `NoMethodError' at 
/usr/lib/ruby/site_ruby/1.9.1/rubygems/specification.rb:1495 - undefined 
method `to_ary' for #<Gem::Specification name=json version=1.7.6>
/usr/lib/ruby/site_ruby/1.9.1/rubygems/requirement.rb:118: stack level too 
deep (SystemStackError)

Chloe@dumbopc /cygdrive/c/Sites/railsinstaller_demo
$ head -1 /usr/bin/rails
#!/usr/bin/ruby.exe -d



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