Fix

Author: co63oc

paddle/fluid/operators/pull_gpups_sparse_op.cc

@@ -117,7 +117,8 @@ class PushGpuPSSparseOpMaker : public framework::SingleGradOpMaker<T> {
     op->SetType("push_gpups_sparse");
     op->SetInput("Ids", this->Input("Ids"));
     op->SetInput(framework::GradVarName("Out"), this->OutputGrad("Out"));
-    op->SetOutput(framework::GradVarName("Ids"), this->InputGrad("Ids", false));
+    op->SetOutput(framework::GradVarName("Ids"),
+                  this->InputGrad("Ids", /* drop_empty_grad */ false));
     op->SetAttrMap(this->Attrs());
   }
 };