I tried this script:

class QueensBase {
int N = 2

double doFitness(List <Integer> board) {
List <Integer> leftDiagonal = new ArrayList(2*N)
List <Integer> rightDiagonal = new ArrayList(2*N)
double sum = 0.0D

for ( i in 1 .. 2*N) {
leftDiagonal[i] = 0
rightDiagonal[i] = 0
for ( i in 1 .. N) {
for ( i in 1 .. ((2*N) - 1)) {
int counter = 0
if ( leftDiagonal[i] > 1)
counter += leftDiagonal[i] - 1
if ( rightDiagonal[i] > 1)
counter += rightDiagonal[i] - 1
sum += counter / (N - Math.abs(i-N))
// target fitness is 0.0
// sum can be negative so return absolute value
return Math.abs(sum)

println new QueensBase().doFitness(1..16)

It worked for me in the Groovy Web Console, Intellij IDEA 2017.3.5 pointing to 2.4.15, and the GroovyConsole for 2.4.15 and 2.3.0.

Perhaps we need a bigger sample to track down your issue.

Cheers, Paul.

On Fri, Apr 13, 2018 at 7:39 PM, Kerridge, Jon <J.Kerridge@napier.ac.uk> wrote:


Thanks for getting back to me so quickly.

I have converted to groovy2.4.15 and the same error occurs.  I am running under Intellij IDE and had downloaded the sdk bundle.


Professor Jon Kerridge
School of Computing
Edinburgh Napier University
Merchiston Campus
Edinburgh EH10 5DT
0131 455 2777

From: Daniel.Sun <sunlan@apache.org>
Sent: 12 April 2018 18:22:39
To: dev@groovy.incubator.apache.org
Subject: Re: Compiler bug
Please try Groovy 2.4.15.


Sent from: http://groovy.329449.n5.nabble.com/Groovy-Dev-f372993.html

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