Problem with long integers with InputBaseN

dev support
1

While trying to compare Lucee with ACF for a possible switch over to Lucee, we ran into this issue:

InputBaseN returns wrong values. This seems to happen with larger integers. Here are two examples.

In Decimal:

writeDump(InputBaseN("8999999999999999",10))
writeDump(InputBaseN("8999999999999998",10))
writeDump(InputBaseN("9999999999999999",10))
writeDump(InputBaseN("9999999999999998",10))

Lucee output (incorrect for “9999999999999999”):

8999999999999999
8999999999999998
10000000000000000  <<< incorrect
9999999999999998

ACF output (all correct):

8999999999999999 
8999999999999998 
9999999999999999 
9999999999999998

In Binary:

<cfscript>
writeDump(InputBaseN("11111111110000000101100000001",2));
writeDump(InputBaseN(11111111110000000101100000001,2));
</cfscript>

Lucee results (second one is off):

536349441
536346624

ACF results (correct):

536349441 
536349441
2

@RCampus, This is an incompatibility issue with ACF.
Created a bug for this: [LDEV-2496] - Lucee