resolve_for_conflict

# File lib/rubygems/resolver.rb, line 367
  def resolve_for_conflict needed, specs, state # :nodoc:
    # We exhausted the possibles so it's definitely not going to work out,
    # bail out.
    raise Gem::ImpossibleDependenciesError.new state.dep, state.conflicts if
      state.possibles.empty?

    # Retry resolution with this spec and add it's dependencies
    spec, act = activation_request state.dep, state.possibles

    needed = requests spec, act, state.needed.dup
    specs = Gem::List.prepend state.specs, act

    return needed, specs
  end