[Maxima-discuss] maxima-5.39.0/ecl-16.1.3 new testsuite failure

[Kris Katterjohn]

On Mon, Dec 19, 2016 at 02:17:52PM +0100, Daniel Kochmański wrote:
> I have already tested with Maxima, see:
> https://gitlab.com/embeddable-common-lisp/ecl/issues/307 . ECL doesn't
> accept denormals by default now, I suspect that this is the main cause
> of this error (but I didn't know how to investigate maxima problems
> further – i.e what error was cought).

Trying to evaluate this in Maxima built with ECL 16.1.3 leads to this
error:

(%i1) li[2](1.0*%i);
Condition of type: DIVISION-BY-ZERO

I built ECL 16.1.2 and 16.1.3 from sources on my 64-bit Linux box.
It looks like the problem comes down to this:

On ECL 16.1.2:

> (log #c(0.0 -1.0))
#C(0.0 -1.5707964)
> (log #c(-0.0 -1.0))
#C(0.0 -1.5707964)

while on 16.1.3:

> (log #c(0.0 -1.0))
#C(0.0 -1.5707964)
> (log #c(-0.0 -1.0))
Condition of type: DIVISION-BY-ZERO

Cheers,
Kris Katterjohn