4.1.1 Cannot convert object to null and LINT

Please, check with lint: ext-all*.js

I have one problem with older computers:

ext-all-debug.js Line: 39330

prepareItems : function(items, applyDefaults) {
//alert(items,applyDefaults);
if (Ext.isArray(items)) {
items = items.slice();
} else {
items = [items];
}



var me = this,
i = 0,
len = items.length,
item;


for (; i < len; i++) {
item = items[i];
if (item === null) {
Ext.Array.erase(items, i, 1);
--i;
--len;
} else {
if (applyDefaults) {
item = this.applyDefaults(item);
}

item.isContained = me;
items[i] = me.lookupComponent(item);


delete item.isContained;
delete items[i].isContained;
}
}


return items;
}

JSLint is a tool that will catch many things but IMO, Crockford takes things too far. There is nothing invalid about using == in many cases.

for (; i < len; i++) {
item = items[i];
if (item == null) {
Ext.Array.erase(items, i, 1);
--i;
--len;
} else {
if (applyDefaults) {
item = this.applyDefaults(item);
}


// Tell the item we're in a container during construction
item.isContained = me;
items[i] = me.lookupComponent(item);
// need to delete both in case item was a config
delete item.isContained;
delete items[i].isContained;
Uncaught TypeError: Cannot convert null to object
}
}
Some times i get this exception on big app. ext-all-dev.js:
Uncaught TypeError: Cannot convert null to object ext-all-dev.js


with no details.


There is a Ext.List (extended) with cellclick listener with:


Ext.suspendLayouts();
Ext.create('Ext.ux.form.Panel',{ //extended form with initComponent:( .. this.callParent() ..)
...
});
Ext.resumeLayouts(true);


This exception throwing 1 time in few days (60 - 150 clicks);