Following script has stopped working following 7.3 upgrade, any idea why shows error against def componentValue line

[Jim Booth]

import com.atlassian.jira.issue.MutableIssue
import com.atlassian.jira.issue.Issue
 import com.atlassian.jira.issue.ModifiedValue
 import com.atlassian.jira.issue.util.DefaultIssueChangeHolder
import com.atlassian.jira.component.ComponentAccessor
 import com.atlassian.jira.ComponentManager
 import com.atlassian.jira.bc.project.component.ProjectComponent
MutableIssue myIssue = (MutableIssue) issue;
def customFieldManager = ComponentAccessor.getCustomFieldManager();
def deviceName = customFieldManager.getCustomFieldObjectByName("Device");
def componentValue = myIssue.getComponents()?.first()?.get("name")
 def changeHolder = new DefaultIssueChangeHolder();
deviceName.updateValue(null, myIssue, new ModifiedValue(issue.getCustomFieldValue(deviceName), componentValue), changeHolder);

[Vasiliy Zverev]

What namely this script should to do? 

What is type for custom field "Divice"?

[Jim Booth]

Device is a text field.

Purpose is to copy the first item in the component/s field to the Device field.

It works correctly in JIRA 6.4.13 but fails when I have upgraded to JIRA 7.3.0

[Vasiliy Zverev]

I assume that this code for postfunction. Since try this

import com.atlassian.jira.event.type.EventDispatchOption
import com.atlassian.jira.issue.MutableIssue
import com.atlassian.jira.issue.UpdateIssueRequest
import com.atlassian.jira.component.ComponentAccessor

try {
    issue.setCustomFieldValue(
            ComponentAccessor.getCustomFieldManager().getCustomFieldObjectByName("Device")
            , issue.getComponentObjects().iterator().next().getName()
    )

    ComponentAccessor.getIssueManager().updateIssue(
            ComponentAccessor.getJiraAuthenticationContext().getUser()
            , issue
            , UpdateIssueRequest.builder().eventDispatchOption(EventDispatchOption.ISSUE_UPDATED).sendMail(false).build()
    )
}catch (NullPointerException e){
    if(issue.getComponentObjects().iterator().hasNext())
        throw e;
}