Fix unnecessary catch and core dump in graph kernel

mindspore/ccsrc/frontend/optimizer/irpass/merge_addn.h

@@ -37,9 +37,11 @@ class MergeAddN : public AnfVisitor {
  public:
   AnfNodePtr operator()(const OptimizerPtr &optimizer, const AnfNodePtr &node) override {
     Reset();
-    optimizer_ = optimizer;
+    mng_ = optimizer->resource()->manager();
     is_outer_ = true;
     AnfVisitor::Match(prim::kPrimAddN, {IsCNode})(node);
+    // do not hold this manager
+    mng_ = nullptr;
     if (!is_match_ || node->func_graph() == nullptr) {
       return nullptr;
     }
@@ -104,8 +106,7 @@ class MergeAddN : public AnfVisitor {
   }
 
   bool is_unique(const AnfNodePtr &node) {
-    auto mng = optimizer_->resource()->manager();
-    auto &node_users = mng->node_users();
+    auto &node_users = mng_->node_users();
     if (node_users.find(node) == node_users.end()) {
       return false;
     }
@@ -124,7 +125,7 @@ class MergeAddN : public AnfVisitor {
   }
 
  private:
-  OptimizerPtr optimizer_{nullptr};
+  FuncGraphManagerPtr mng_{nullptr};
   std::vector<AnfNodePtr> Xs_{}, Ys_{}, args_{};
   bool is_inner_{false}, is_outer_{false}, is_match_{false};
 };

mindspore/ccsrc/pipeline/jit/pipeline.cc

@@ -481,9 +481,9 @@ bool ExecutorPy::CompileInner(const py::object &obj, const py::tuple &args, cons
   SaveCompiledGraph(phase_s);
 
   opt::python_pass::PyPassManager::GetInstance()->ClearPipelineRes();
-  resource->Clean();
   // Reclaim all resource used by optimizer;
   ReclaimOptimizer();
+  resource->Clean();
 
   MS_LOG(INFO) << "End ExecutorPy compile!";
   return true;