java.lang.StringIndexOutOfBoundsException: String index out of range: 67 with broken AST

[kittaakos]

a.sadl:

 uri "http://sadl.org/a.sadl".
 AAA is a class.

d1.dailog:

 uri "http://sadl.org/d1.dialog".
 import "http://sadl.org/a.sadl" // <- note the missing EOL here

Error:

ENTRY org.apache.log4j 4 0 2020-04-20 09:34:16.196
!MESSAGE org.eclipse.xtext.validation.ResourceValidatorImpl  - String index out of range: 67

!STACK 0
java.lang.StringIndexOutOfBoundsException: String index out of range: 67
    at java.lang.String.substring(String.java:1963)
    at com.ge.research.sadl.darpa.aske.processing.JenaBasedDialogModelProcessor.storeOriginalElementInfo(JenaBasedDialogModelProcessor.java:470)
    at com.ge.research.sadl.darpa.aske.processing.JenaBasedDialogModelProcessor.onValidate(JenaBasedDialogModelProcessor.java:343)
    at com.ge.research.sadl.validation.ResourceValidator.doValidate(ResourceValidator.java:75)
    at com.ge.research.sadl.validation.ResourceValidator.validate(ResourceValidator.java:71)
    at org.eclipse.xtext.validation.ResourceValidatorImpl.validate(ResourceValidatorImpl.java:90)
    at com.ge.research.sadl.validation.ResourceValidator.lambda$0(ResourceValidator.java:55)
    at org.eclipse.xtext.util.OnChangeEvictingCache.get(OnChangeEvictingCache.java:76)
    at com.ge.research.sadl.validation.ResourceValidator.validate(ResourceValidator.java:57)
    at org.eclipse.xtext.ui.editor.validation.ValidationJob$1.exec(ValidationJob.java:91)
    at org.eclipse.xtext.ui.editor.validation.ValidationJob$1.exec(ValidationJob.java:1)
    at org.eclipse.xtext.util.concurrent.CancelableUnitOfWork.exec(CancelableUnitOfWork.java:26)
    at org.eclipse.xtext.resource.OutdatedStateManager.exec(OutdatedStateManager.java:91)
    at org.eclipse.xtext.ui.editor.model.XtextDocument$XtextDocumentLocker.internalReadOnly(XtextDocument.java:527)
    at org.eclipse.xtext.ui.editor.model.XtextDocument$XtextDocumentLocker.readOnly(XtextDocument.java:499)
    at org.eclipse.xtext.ui.editor.model.XtextDocument.readOnly(XtextDocument.java:137)
    at org.eclipse.xtext.ui.editor.validation.ValidationJob.createIssues(ValidationJob.java:86)
    at org.eclipse.xtext.ui.editor.validation.ValidationJob.run(ValidationJob.java:67)
    at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63)

[crapo]

fixed