Microsoft.Data.Analysis: meaningless lines of code?

[nodakai]

machinelearning/src/Microsoft.Data.Analysis/DataFrame.IO.cs

Line 132 in 4c799ab

items[c] = items[c];

The inner loop seems to be meaningless

machinelearning/src/Microsoft.Data.Analysis/PrimitiveColumnContainer.cs

Line 36 in 4c799ab

if (Buffers.Count == 0)

Isn't the list guaranteed to be empty here within a ctor?