In Script Console, when you write a script to get the Select List (cascading) field and its values, the Static Type Checking errors/warnings disappear and some errors are shown in the logs & HAR file.

Steps to Reproduce

1.  Copy and paste the following script into the Script Console:

   import com.atlassian.jira.component.ComponentAccessor
   
   def issue = ComponentAccessor.getIssueManager().getIssueObject("SUN-3")
   
   // undeclared variable to trigger error
   issue4
   
   // If I enter a Text Field
   def field = ComponentAccessor.getCustomFieldManager().getCustomFieldObject("customfield_10000") 
   def fieldValue = issue.getCustomFieldValue(field)
   
   if(fieldValue.toString().contains("Yes")){ 
       log.warn "YES"
   }
   

2. Hover your mouse over the issue4 variable, you will see the Static Type Checking warning - "[Static type checking] - The variable [issue4] is undeclared.".
3. Create a Jira's Select List (cascading) custom field.
4. Modify the script in Script Console to replace the "customfield_10000" with the Select List (cascading) custom field id (i.e. customfield_10200):

   // If I enter a Select List (cascading) field
   def field = ComponentAccessor.getCustomFieldManager().getCustomFieldObject("customfield_10200") 
   def fieldValue = issue.getCustomFieldValue(field)
   

Expected Behaviour

The Static Type Checking warnings or errors should display for the undeclared variable - issue4.

Actual Behaviour

The Static Type Checking warnings or errors are not showing.

Workarounds

To cast the field value to a Map:

//  If I enter a Select List (cascading) field
def field = ComponentAccessor.getCustomFieldManager().getCustomFieldObject("customfield_10200") 
def fieldValue = issue.getCustomFieldValue(field) as Map

Additional Information

• I attached a demonstration video for reference: Screen Recording 2022-11-07 at 3.40.48 PM.mov
• I was able to reproduce the issue since ScriptRunner version 6.52.1.
• The following is shown in the first line of the script:

  Failed type checking. Not all types of code can be checked, so this doesn't mean your script is not valid.
  

• The HAR file shows the 500 error for the requests below:
  • http://localhost:9093/rest/scriptrunner/latest/codeinsight/documentation
  • http://localhost:9093/rest/scriptrunner/latest/codeinsight/completions
• The following stack trace is shown in the atlassian-jira.log:

  2022-11-07 15:28:40,157+0800 http-nio-9093-exec-1 WARN admin 928x246x1 1qiog4s 0:0:0:0:0:0:0:1 /rest/scriptrunner/latest/codeinsight/check [c.o.s.stc.typecheck.TypeCheckingService] Failed type checking for import com.atlassian.jira.component.ComponentAccessor
      
      def issue = ComponentAccessor.getIssueManager().getIssueObject("SUN-3")
      
      // undeclared variable to trigger error
      issue4
      
      // if I enter a Cascading select list
      def field = ComponentAccessor.getCustomFieldManager().getCustomFieldObject("customfield_10200") 
      def fieldValue = issue.getCustomFieldValue(field)
      
      if(fieldValue.toString().contains("Yes")){ 
          log.warn "YES"
      }
        
         isFile: false and we don't know why, it's our fault not yours
  BUG! exception in phase 'instruction selection' in source unit 'script1667806120039580541035.groovy' Expected earlier checking to detect generics parameter arity mismatch
  Expected: java.util.Map<K,V> 
  Supplied: java.util.Map<com.atlassian.jira.issue.customfields.option.Option>