Casting error from DelegatingApplicationUser to api.User in post function script (Groovy)

[Hank Hepler]

I have a script that takes a member group and splits the current users into an email string that gets used by a custom email function. The error I am getting says 

2017-06-20 15:28:36,113 ERROR [workflow.ScriptWorkflowFunction]: Special Test Priority Value option: 5 - Stop working on everything else and get this done
2017-06-20 15:28:36,113 ERROR [workflow.ScriptWorkflowFunction]: The reporter is: Hank Hepler
2017-06-20 15:28:36,113 ERROR [workflow.ScriptWorkflowFunction]: Testing out DSTR 
2017-06-20 15:28:36,160 ERROR [workflow.ScriptWorkflowFunction]: *************************************************************************************
2017-06-20 15:28:36,160 ERROR [workflow.ScriptWorkflowFunction]: Script function failed on issue: null, actionId: 1, file: <inline script>
org.codehaus.groovy.runtime.typehandling.GroovyCastException: Cannot cast object 'a092rzz(a092rzz)' with class 'com.atlassian.jira.user.DelegatingApplicationUser' to class 'com.atlassian.crowd.embedded.api.User'
	at Script104.getGroupEmails(Script104.groovy:83)
	at Script104.run(Script104.groovy:55)

I fixed the null issue error, but am kind of lost on the casting of the object. How can I get the users in the correct object (User)? Below is the function... we just upgraded to 7 so I have this in multiple places.

def getGroupEmails(String groupName)
{
	def gusers = new StringBuilder();
	def userManager = ComponentAccessor.getUserManager();
	def groupManager = ComponentAccessor.getGroupManager();
	def group = userManager.getGroup(groupName);
	List<User> usersInGroup = (List)groupManager.getDirectUsersInGroup(group)

	for (User user : usersInGroup){
		if (gusers.length() > 0) gusers.append( ", " );
		gusers.append( user.getEmailAddress() );    
	}
	return gusers.toString();
}

Any help will be greatly appreciated!

Thanks,

Hank
3M Systems Engineer

[Tarun Sapra]

Here's your solution 

https://community.atlassian.com/t5/JIRA-questions/Cast-Exception/qaq-p/69715