id summary reporter owner description type status milestone component version severity resolution keywords cc 12580 cpp_bin_float: Bad rounding in corner case of subtraction Michael Shatz John Maddock "Subtraction produces incorrectly rounded result when a small number in range (ULP*0.5..ULP*1.0) subtracted from integer power of 2. The correct answer should be (original number - ULP), but boost returns unmodified original number." Bugs closed To Be Determined multiprecision Boost 1.62.0 Problem fixed