id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
12170	boost::multiprecision::export_bits throws on a negative cpp_int number	Tassilo Glander <tassilo.glander@…>	John Maddock	"When calling export_bits on a negative boost::multiprecision number based on cpp_int, an exception is thrown from the internal method msb (""testing individual bits in negative values is not supported"").

boost::multiprecision::checked_int128_t i (-1); // use negative number
std::vector<unsigned char> v;
export_bits(i, std::back_inserter(v), 8);  // throws

export_bits is designed to be used for data exchange, so must export valid data."	Bugs	closed	To Be Determined	multiprecision	Boost 1.60.0	Problem	fixed	export_bits cpp_int