# Execute a docunit compiled by `test_single_docunit`
	fun execute_simple_docunit(du: DocUnit)
	do
		var file = du.test_file.as(not null)
		var i = du.test_arg or else 0
		toolcontext.info("Execute doc-unit {du.full_name} in {file} {i}", 1)
		var clock = new Clock
		var res2 = toolcontext.safe_exec("{file.to_program_name}.bin {i} >'{file}.out1' 2>&1 </dev/null")
		if not toolcontext.opt_no_time.value then du.real_time = clock.total
		du.was_exec = true

		var content = "{file}.out1".to_path.read_all
		du.raw_output = content

		if res2 != 0 then
			du.error = "Runtime error in {file} with argument {i}"
			toolcontext.modelbuilder.failed_entities += 1
		end
	end