SBCL needs to trap division by zero errors

[vindarel]

It's all documented since you do document to run with

#-sbcl (hello)

#+sbcl
(sb-int:with-float-traps-masked
    (:divide-by-zero :invalid)
  (callback))

but this is not ideal, hence the issue. Do you know the reason ?

[lispnik]

https://bugs.launchpad.net/sbcl/+bug/1519630

I'm not sure what to do about it though.