https://bz.apache.org/SpamAssassin/show_bug.cgi?id=8028
--- Comment #1 from Loren Wilton <lwil...@earthlink.net> --- Sidney, you are dealing with roundoff error. The representation of -2.4 in 64 bit IEEE is 0xc003333333333333. The top 12 bits are the exponent and mantissa sign, and the remainder is the mantissa value. As you can deduce from the number above, this is a repeating fraction, and -2.4 can not be represented exactly. The standard library math routines try to take roundoff error into account, and round output numbers to some reasonable number of digits. Sometimes they get confused for various and sundry reasons. I'd suggest either accepting a result that is within a small epsilon of the desired value, or doing a manual round to some reasonable number of digits on the returned result before the compare. See https://gregstoll.com/~gregstoll/floattohex/ -- You are receiving this mail because: You are the assignee for the bug.