WARN: Unresolved specs during Gem::Specification.reset:

[arlyxiao]

code:

require 'forever'

RAILS_ROOT = File.expand_path("..", File.dirname(__FILE__))

Forever.run :fork => true do
  before :each do
    require RAILS_ROOT + '/config/boot' # here the rails/padrino environment
  end

  every 2.seconds do
    p 'hello world'
  end
end

will appear the errors:

WARN: Unresolved specs during Gem::Specification.reset:
thor (>= 0.15.0)
WARN: Clearing out unresolved specs.
Please report a bug if this causes problems.
"hello world"