unwind_for_conflict

# File lib/bundler/vendor/molinillo/lib/molinillo/resolution.rb, line 304
      def unwind_for_conflict
        details_for_unwind = build_details_for_unwind
        unwind_options = unused_unwind_options
        debug(depth) { "Unwinding for conflict: #{requirement} to #{details_for_unwind.state_index / 2}" }
        conflicts.tap do |c|
          sliced_states = states.slice!((details_for_unwind.state_index + 1)..-1)
          raise_error_unless_state(c)
          activated.rewind_to(sliced_states.first || :initial_state) if sliced_states
          state.conflicts = c
          state.unused_unwind_options = unwind_options
          filter_possibilities_after_unwind(details_for_unwind)
          index = states.size - 1
          @parents_of.each { |_, a| a.reject! { |i| i >= index } }
          state.unused_unwind_options.reject! { |uw| uw.state_index >= index }
        end
      end