Wrap fix scripts in functions... or else

[treycarroll]

We noticed a very odd issue yesterday when running a "no brainer" script to update items in a GlideRecord while next loop:

var gr = new GlideRecord("cmdb_ci");
   gr.addNotNullQuery('u_vulnerability_remediation_group');
   gr.query();
   while ( gr.next() ) {
             try {
                       gr.setValue('u_vulnerability_remediation_group',   '');
                       gr.update();
             } catch(e) {
                       gs.print(e.message);
             }
   }

I have used code like this for years in SNOW and it just works (err.. worked).   I have some examples just like this actually checked into source control!

Under Helsinki, the actual results of this script were "intriguing":   It deleted a single item and then exited the loop.  

After some tinkering I discovered that a function wrapper solved the problem.

//After wrapping the code in a IFFE, the loop continues to update items as expected.
(function() {
   var gr = new GlideRecord("cmdb_ci");
   gr.addNotNullQuery('u_vulnerability_remediation_group');
   gr.query();
   while ( gr.next() ) {
             try{
                       gr.setValue('u_vulnerability_remediation_group',   '');
                       gr.update();
             } catch(e) {
                       gs.print(e.message);
             }
   }
}());