If there are several options, it is useful to take time to analyze open libraries in order to choose the best one.
by Andrey Karpov
From the article:
Because of a typo, the original vector is returned, not the new scaledVector container. The same error occurs in the division operator. Facepalm. Again, these errors don't mean anything separately. Although, this is a hint that this library isn't used much and there is highly likely that there are other serious undetected errors in it.