yesterday Mike Pechkin found a bug in 64-bit bignum multiplication.
It is a really stupid bug, returning the wrong register value when the
first argument is a bignum and the second argument is zero. Only in this
special combination. For example
(* 1448194831602515360 0)
Too bad that we found this so late! It eluded all unit tests :(
The fix was easy. I've uploaded a new release, and committed the change
to the repo.
Sorry for the trouble!