Cannot read property 'tr' of undefined after extand node with empty array of childrens.

[akabynga]

I think, will be cool to add checking for empty array of children cause I got error on following function:

function findPrevRowNode(node){
    var i, last, prev,
        parent = node.parent,
        siblings = parent ? parent.children : null;

    if(siblings && siblings.length > 1 && siblings[0] !== node){
        // use the lowest descendant of the preceeding sibling
        i = $.inArray(node, siblings);
        prev = siblings[i - 1];
        _assert(prev.tr);
        // descend to lowest child (with a <tr> tag)
        while(prev.children){
            last = prev.children[prev.children.length - 1];
            if(!last.tr){
                break;
            }
            prev = last;
        }
    }else{
        // if there is no preceding sibling, use the direct parent
        prev = parent;
    }
    return prev;
}

while(prev.children) change to  while(prev.children && prev.children.length > 0)

Thanks.

[mar10]

Could you please give some details, when this problem occurs, i.e. what is the tree structure when you expand?
(I would like to reproduce the error before I apply a fix.)
Thanks!