add: if (!server) continue; 
context: function FillIdentityListPopup(popup){  var accounts = queryISupportsArray(gAccountManager.accounts, Components.interfaces.nsIMsgAccount);  accounts.sort(compareAccountSortOrder);  for (var i in accounts) {    var server = accounts[i].incomingServer;    var identites = queryISupportsArray(accounts[i].identities, Components.interfaces.nsIMsgIdentity);    for (var j in identites) {      var identity = identites[j];      var item = document.createElement("menuitem");      item.className = "identity-popup-item";      item.setAttribute("label", identity.identityName);      item.setAttribute("value", identity.key);      item.setAttribute("accountname", " - " + server.prettyName);      popup.appendChild(item);    }  }}
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/cdd828a209c9ce9bb461f58da462d5498948f83c/MsgComposeCommands.js/clean/mailnews/compose/resources/content/MsgComposeCommands.js