message: Fixes build broken on mac compilers
diff: @@ -113,7 +113,8 @@ mutex* GetTrainingVariableMutex(OpKernelContext* ctx, int input, bool sparse,
  if (ctx->input_dtype(input) == DT_RESOURCE) {
  if (LookupResource(ctx, HandleFromInput(ctx, input), maybe_resource).ok()) {
  if (sparse) {
  - EnsureSparseVariableAccess<Device, T>(ctx, *maybe_resource);
  + EnsureSparseVariableAccess<Device, T>(ctx, *maybe_resource)
  + .IgnoreError();
  }
  return (*maybe_resource)->mu();
  } else {
  