construct_sql in HasManyThroughAssociation is broken

This is not, strictly spoken, a bug report as I don't know whether it creates any misbehavior... just a piece of code which certainly doesn't work as intended:

Line 183 and following of active_record/associations/has_many_through_association.rb:

def construct_sql
  case
    when @reflection.options[:finder_sql]
      @finder_sql = interpolate_sql(@reflection.options[:finder_sql])

      @finder_sql = "#{@reflection.quoted_table_name}.#{@reflection.primary_key_name} = #{owner_quoted_id}"
      @finder_sql << " AND (#{conditions})" if conditions
    else
      @finder_sql = construct_conditions
  end

The case statement does not have a value to test.

@finder_sql is assigned twice, the first value gets overwritten, thus @reflection.options[:finder_sql] has no effect.

Any comments? Somebody with more in-depth knowledge of ActiveRecord motivated to have a look at it?