lib/benchmark_driver/runner.rb in benchmark_driver-0.15.15 vs lib/benchmark_driver/runner.rb in benchmark_driver-0.15.16

@@ -28,9 +28,13 @@
 
       jobs.group_by{ |j| j.respond_to?(:contexts) && j.contexts }.each do |contexts, contexts_jobs|
         contexts_jobs.group_by(&:metrics).each do |metrics, metrics_jobs|
           metrics_jobs.group_by(&:class).each do |klass, klass_jobs|
             runner = runner_for(klass)
+            if runner_config.alternate && runner != BenchmarkDriver::Runner::RubyStdout
+              abort "--alternate is supported only for ruby_stdout runner for now"
+            end
+
             contexts = build_contexts(contexts, executables: config.executables)
             output = Output.new(
               type: config.output_type,
               metrics: metrics,
               jobs: klass_jobs.map { |job| BenchmarkDriver::Job.new(name: job.name) },