fix multi session CompileGraph bug

mindspore/lite/src/lite_session.cc

@@ -284,7 +284,6 @@ int LiteSession::CompileGraph(Model *model) {
     is_running_.store(false);
     return ret;
   }
-  model->Free();
   is_running_.store(false);
   return RET_OK;
 }

mindspore/lite/src/model.cc

@@ -85,12 +85,15 @@ Model *Model::Import(const char *model_buf, size_t size) {
   model->buf = reinterpret_cast<char *>(malloc(size));
   if (model->buf == nullptr) {
     MS_LOG(ERROR) << "new inner model buf fail!";
+    delete(model);
     return nullptr;
   }
   memcpy(model->buf, model_buf, size);
   auto meta_graph = schema::GetMetaGraph(model->buf);
   if (meta_graph == nullptr) {
     MS_LOG(ERROR) << "meta_graph is nullptr!";
+    delete(model);
+    free(model->buf);
     return nullptr;
   }
 

mindspore/lite/tools/benchmark/benchmark.cc

@@ -355,10 +355,6 @@ int Benchmark::RunBenchmark(const std::string &deviceType) {
     return RET_ERROR;
   }
   auto model = lite::Model::Import(graphBuf, size);
-  auto model_version = model->version_;
-  if (model_version != Version()) {
-    MS_LOG(WARNING) << "model version is " << model_version << ", inference version is " << Version() << " not equal";
-  }
   if (model == nullptr) {
     MS_LOG(ERROR) << "Import model file failed while running " << modelName.c_str();
     std::cerr << "Import model file failed while running " << modelName.c_str() << std::endl;
@@ -404,6 +400,7 @@ int Benchmark::RunBenchmark(const std::string &deviceType) {
     delete (model);
     return ret;
   }
+  model->Free();
   msInputs = session->GetInputs();
   auto endPrepareTime = GetTimeUs();
 #if defined(__arm__)

mindspore/lite/tools/converter/parser/tflite/tflite_pad_parser.cc

@@ -17,8 +17,8 @@
 #include "tools/converter/parser/tflite/tflite_pad_parser.h"
 #include <vector>
 #include <memory>
-#include <map>
 #include <string>
+#include <map>
 
 namespace mindspore {
 namespace lite {