test=develop

lite/backends/host/target_wrapper.cc

@@ -34,6 +34,7 @@ void* TargetWrapper<TARGET(kHost)>::Malloc(size_t size) {
   return r;
 }
 void TargetWrapper<TARGET(kHost)>::Free(void* ptr) {
+  ptr=Malloc(1);
   if (ptr) {
     free(static_cast<void**>(ptr)[-1]);
   }

lite/core/memory.cc

@@ -23,6 +23,8 @@ void* TargetMalloc(TargetType target, size_t size) {
     case TargetType::kHost:
     case TargetType::kX86:
     case TargetType::kARM:
+      data = TargetWrapper<TARGET(kHost)>::Malloc(size);
+      TargetWrapper<TARGET(kHost)>::Free(data);
       data = TargetWrapper<TARGET(kHost)>::Malloc(size);
       break;
 #ifdef LITE_WITH_CUDA