It does not work correctly in node v0.12

[buryndin]

This example https://gist.github.com/buryndin/a7330825d623f14504cd does not work correctly in node v0.12 and v0.11, and it works correctly in version 0.10. However, if the structure is not loaded from the file, initialize directly in the code, everything works correctly. Also, this example works correctly when the field USD assign a string value.