On 17 January 2011 18:15, Andrey G. Grozin <A.G.Grozin@...> wrote:
> Now there is a new testsuite failure with sbcl. It's rtest16, problem 385.
> It's about floating-point calculation of zeta(%i+3) (%i is the imaginary
> unit). sbcl produced a resulr with error of order 3*10^(-9) instead of
> expected 10^(-15). Earlier versions of sbcl did not have this failure.
> Looks like a regression. All the other lisps listed above also don't have
> this particular failure (ecl has 2 failures in rtest8, this is another
> story). Looks like something is calculated in single precision when it
> should be done in double.
Do you recall what's the latest version in which that test passed? (It
fails with 1.0.44 as well.)
Alternatively, if a Maxima wizard can reduce a test-case that doesn't
involve Maxima -- just shows an SBCL operation that returns the wrong
value -- what would help too.