iterate_guarding_exceptions

# File activesupport/lib/active_support/notifications/fanout.rb, line 20
        def iterate_guarding_exceptions(collection, &block)
          case collection.size
          when 0
          when 1
            collection.each(&block)
          else
            exceptions = nil

            collection.each do |s|
              yield s
            rescue Exception => e
              exceptions ||= []
              exceptions << e
            end

            if exceptions
              exceptions = exceptions.flat_map do |exception|
                exception.is_a?(InstrumentationSubscriberError) ? exception.exceptions : [exception]
              end
              if exceptions.size == 1
                raise exceptions.first
              else
                raise InstrumentationSubscriberError.new(exceptions), cause: exceptions.first
              end
            end
          end

          collection
        end