Since there's apparently no way to edit a comment, the previous comment
I thought we agreed a long time ago not to check for either overflows or
underflows when ZORBA_WITH_BIG_INTEGER=OFF.
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negative result for fib(95)
Status in Zorba - The XQuery Processor:
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)
gives -4953053512429003327 but should return 31940434634990099905.
This seems to be a overflow in numerics. fib(90) gives the correct
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