Major Description
As of 0.5.0, Strings consistently lack nul-termination, so usage of `strtod` in `Str_To_F64` needs to be adjusted. The solution is to copy the string content into a nul-terminated buffer.
Long term, a more efficient solution would be to craft our own string-to-double conversion routine and replace `strtod`, but that's a lot of work for little benefit right now.