Merge pull request #1524 from zhangyang0701/develop

fix memory leakage problem close #1523

src/framework/scope.h

@@ -32,7 +32,16 @@ class Scope {
   Scope() = default;
 
   ~Scope() {
+    for (auto &var : vars_) {
       DropKids();
+      delete var.second;
+    }
+    vars_.clear();
+    for (auto kid : kids_) {
+      delete kid;
+    }
+    kids_.clear();
+
 #ifdef PADDLE_MOBILE_CL
     delete cl_scope_;
 #endif