How exactly can one store the string representation of a BigInt? The seemingly obvious ```d //... dchar[] ret; //dchar[] is necessary for my project //Assume that val is a BigInt with a value set earlier: val.toString(ret, "%d"); //... ``` doesn't work. I am using x86_64 windows with -m64, and v2.100.1(LDC2 1.30.0).