id summary reporter owner description type status milestone component version severity resolution keywords cc 12199 cpp_bin_float addition: bad rounding when difference beetween exponents of operands is equal to # of bits in significand Michael Shatz John Maddock "If the difference of exponents of two cpp_bin_float values is exactly equal to # of bits in significand then result of addition is not rounded correctly. Platform: Mingw, gcc 5.3.0, x64. All optimization levels. Library version: both 1.60.0 and the newest files from github " Bugs closed To Be Determined multiprecision Boost 1.60.0 Problem fixed