fix debugf log formatting for exit code

pipeline/runtime/execer.go

@@ -249,7 +249,7 @@ func (e *Execer) exec(ctx context.Context, state *pipeline.State, spec Spec, ste
 			log.Debugln("received oom kill.")
 			state.Finish(step.GetName(), 137)
 		} else {
-			log.Debugln("received exit code %d", exited.ExitCode)
+			log.Debugf("received exit code %d", exited.ExitCode)
 			state.Finish(step.GetName(), exited.ExitCode)
 		}
 		err := e.reporter.ReportStep(noContext, state, step.GetName())

pipeline/runtime/runner.go

@@ -279,8 +279,8 @@ func (s *Runner) run(ctx context.Context, stage *drone.Stage, data *client.Conte
 
 	log.Debug("updated stage to running")
 
-	ctxcancel = logger.WithContext(ctxcancel, log)
-	err = s.Exec(ctxcancel, spec, state)
+	ctxlogger := logger.WithContext(ctxcancel, log)
+	err = s.Exec(ctxlogger, spec, state)
 	if err != nil {
 		log.WithError(err).
 			WithField("duration", stage.Stopped-stage.Started).