message: [Grappler] Fix a stack-use-after-scope
  The problem is that Attrs stores a non-owning reference to the temporary
  intializer list. The lifetime of that list ends at the end of the full
  expression. This happens to work if TF is compiled with -fmerge-all-constants
  but doesn't without it.
diff: @@ -203,15 +203,15 @@ Status CreateSimpleConv2DBackpropFilter(GraphDef* graph,
  ops::RandomUniform(scope.WithOpName("out_backprop"),
  {kBatchSize, kHeight, kWidth, kDepthOut}, data_type);
  if (padding == "EXPLICIT") {
  - auto attrs = ops::Conv2DBackpropFilter::Attrs()
  - .Dilations({1, kDilation, kDilation, 1})
  - .ExplicitPaddings({0, 0, kPaddingTop, kPaddingBottom,
  - kPaddingLeft, kPaddingRight, 0, 0})
  - .DataFormat(kSrcFormat);
  auto conv2d_backprop_filter = ops::Conv2DBackpropFilter(
  scope.WithOpName("conv2d_backprop_filter").WithDevice("/device:GPU:0"),
  input, {kHeight, kWidth, kDepthIn, kDepthOut}, out_backprop,
  - {1, 2, 4, 1}, padding, attrs);
  + {1, 2, 4, 1}, padding,
  + ops::Conv2DBackpropFilter::Attrs()
  + .Dilations({1, kDilation, kDilation, 1})
  + .ExplicitPaddings({0, 0, kPaddingTop, kPaddingBottom, kPaddingLeft,
  + kPaddingRight, 0, 0})
  + .DataFormat(kSrcFormat));
  auto output =
  ops::Identity(scope.WithOpName("output"), conv2d_backprop_filter);
  } else {
  