fix nil pointer panic

Author: AgnesToulet

internal/execution/scheduler.go

@@ -451,8 +451,7 @@ func (e *Scheduler) Run(globalCtx, runCtx context.Context, samplesOut chan<- met
 	e.initProgress.Modify(pb.WithConstProgress(1, "Starting test..."))
 	e.state.MarkStarted()
 	defer func() {
-		isMarkedAsFailed := e.state.Test.TestStatus.Failed()
-		if isMarkedAsFailed {
+		if e.state.Test.TestStatus != nil && e.state.Test.TestStatus.Failed() {
 			e.state.SetExecutionStatus(lib.ExecutionStatusMarkedAsFailed)
 			return
 		}