eth: fix error in tracing if reexec is set (ethereum#21830)

* eth: fix error in tracing if reexec is set

* eth: change pointer embedding to value-embedding

Author: holiman

eth/api_tracer.go

@@ -65,7 +65,7 @@ type TraceConfig struct {
 
 // StdTraceConfig holds extra parameters to standard-json trace functions.
 type StdTraceConfig struct {
-	*vm.LogConfig
+	vm.LogConfig
 	Reexec *uint64
 	TxHash common.Hash
 }
@@ -549,9 +549,7 @@ func (api *PrivateDebugAPI) standardTraceBlockToFile(ctx context.Context, block
 		txHash    common.Hash
 	)
 	if config != nil {
-		if config.LogConfig != nil {
-			logConfig = *config.LogConfig
-		}
+		logConfig = config.LogConfig
 		txHash = config.TxHash
 	}
 	logConfig.Debug = true
@@ -576,7 +574,7 @@ func (api *PrivateDebugAPI) standardTraceBlockToFile(ctx context.Context, block
 		chainConfigCopy := new(params.ChainConfig)
 		*chainConfigCopy = *chainConfig
 		chainConfig = chainConfigCopy
-		if yolov2 := config.Overrides.YoloV2Block; yolov2 != nil {
+		if yolov2 := config.LogConfig.Overrides.YoloV2Block; yolov2 != nil {
 			chainConfig.YoloV2Block = yolov2
 			canon = false
 		}