Challenge http://www.freecodecamp.com/challenges/bonfire-return-largest-numbers-in-arrays has an issue

[niftrr]

Solution produces results equal to those asserted but but fails same tests, below. Code to replicate included, below.

assert(largestOfFour([[4, 9, 1, 3], [13, 35, 18, 26], [32, 35, 97, 39], [1000000, 1001, 857, 1]]).should.eql([9,35,97,1000000]));Cannot read property 'eql' of undefined

(largestOfFour([[4, 5, 1, 3], [13, 27, 18, 26], [32, 35, 37, 39], [1000, 1001, 857, 1]])).should.eql([5,27,39,1001]);Cannot read property 'eql' of undefined

function largestOfFour(arr) {
maxArr = [];
maxNum = 0;
for (var x in arr) {
for(var y in arr[x]) {
if (arr[x][y] > maxNum) maxNum = arr[x][y];
}
maxArr.push(maxNum);
maxNum = 0;
}
return maxArr;
}

[terakilobyte]

Fixed with a previous commit. Thanks for the heads up!