negative result for fib(95)

[Matthias Brantner]

declare function local:fib($n as xs:integer) as xs:integer
{
 if ($n eq 0) then 0
 else if ($n eq 1) then 1
 else local:fib($n - 1) + local:fib($n - 2)
};

local:fib(95)

gives -4953053512429003327 but should return 31940434634990099905. This seems to be a overflow in numerics. fib(90) gives the correct result.

[Paul J. Lucas (paul-lucas)]

I thought we agreed a long time ago neither not to check for either overflows or underflows when ZORBA_WITH_BIG_INTEGER=OFF.

[Paul J. Lucas (paul-lucas)]

Since there's apparently no way to edit a comment, the previous comment should read:

I thought we agreed a long time ago not to check for either overflows or underflows when ZORBA_WITH_BIG_INTEGER=OFF.

[Matthias Brantner (matthias-brantner)]

Yes, you are absolutely right. It's because I had Zorba compiled without big number support.