Allow gofail trigger to fail as long as the member stops running

This is required for compaction based failpoint, to allow the traffic
send compaction request causing etcd to crash before failpoint executes
the trigger.

Signed-off-by: Marek Siarkowicz <siarkowicz@google.com>

tests/robustness/failpoint/gofail.go

@@ -90,30 +90,38 @@ func (f goPanicFailpoint) Inject(ctx context.Context, t *testing.T, lg *zap.Logg
 			lg.Info("goFailpoint setup failed", zap.String("failpoint", f.Name()), zap.Error(err))
 			continue
 		}
-		if !member.IsRunning() {
-			// TODO: Check member logs that etcd not running is caused panic caused by proper gofailpoint.
-			break
-		}
-		if f.trigger != nil {
+		break
+	}
+
+	if f.trigger != nil {
+		for member.IsRunning() {
+			select {
+			case <-ctx.Done():
+				return reports, ctx.Err()
+			default:
+			}
 			var r []report.ClientReport
 			lg.Info("Triggering gofailpoint", zap.String("failpoint", f.Name()))
 			r, err = f.trigger.Trigger(ctx, t, member, clus, baseTime, ids)
 			if err != nil {
 				lg.Info("gofailpoint trigger failed", zap.String("failpoint", f.Name()), zap.Error(err))
+				continue
 			}
 			if r != nil {
 				reports = append(reports, r...)
 			}
+			break
 		}
-		lg.Info("Waiting for member to exit", zap.String("member", member.Config().Name))
-		err = member.Wait(ctx)
-		if err != nil && !strings.Contains(err.Error(), "unexpected exit code") {
-			lg.Info("Member didn't exit as expected", zap.String("member", member.Config().Name), zap.Error(err))
-			return reports, fmt.Errorf("member didn't exit as expected: %v", err)
-		}
-		lg.Info("Member exited as expected", zap.String("member", member.Config().Name))
 	}
 
+	lg.Info("Waiting for member to exit", zap.String("member", member.Config().Name))
+	err = member.Wait(ctx)
+	if err != nil && !strings.Contains(err.Error(), "unexpected exit code") {
+		lg.Info("Member didn't exit as expected", zap.String("member", member.Config().Name), zap.Error(err))
+		return reports, fmt.Errorf("member didn't exit as expected: %v", err)
+	}
+	lg.Info("Member exited as expected", zap.String("member", member.Config().Name))
+
 	if lazyfs := member.LazyFS(); lazyfs != nil {
 		lg.Info("Removing data that was not fsynced")
 		err := lazyfs.ClearCache(ctx)