delete_matched (ActiveSupport::Cache::FileStore)

    # File lib/active_support/cache/file_store.rb, line 32
          def delete_matched(matcher, options = nil)
            super
            search_dir(@cache_path) do |f|
              if f =~ matcher
                begin
                  File.delete(f)
                rescue SystemCallError => e
                  # If there's no cache, then there's nothing to complain about
                end
              end
            end
          end