NPE When there's a validation error

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I can't reproduce it, But at some point, given this:

<?xml version="1.0" encoding="UTF-8"?>
<xmlip xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xsi:noNamespaceSchemaLocation="xml.xsd">
    <hh>
        
    </hh>
<hh>

</hh>
<ds>
    
</ds>
</xmlip>

and its xml.xsd:

<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
    <xs:element name="xmlip">
        <xs:complexType>
            <xs:sequence>
                <xs:element name="hh" type="xs:string" />
            </xs:sequence>
        </xs:complexType>
    </xs:element>
</xs:schema>

I got that NPE, while diagnostics: were being computed

[Error - 11:41:58 PM] Nov 09, 2020 11:41:58 org.eclipse.lemminx.extensions.contentmodel.participants.diagnostics.XMLValidator doDiagnostics()
Message: Unexpected XMLValidator error
java.lang.NullPointerException
	at org.eclipse.lemminx.extensions.contentmodel.participants.diagnostics.LSPErrorReporterForXML.toLSPRange(LSPErrorReporterForXML.java:76)
	at org.eclipse.lemminx.extensions.xerces.AbstractLSPErrorReporter.internalToLSPRange(AbstractLSPErrorReporter.java:161)
	at org.eclipse.lemminx.extensions.xerces.AbstractLSPErrorReporter.reportError(AbstractLSPErrorReporter.java:95)
	at org.apache.xerces.impl.XMLErrorReporter.reportError(Unknown Source)
	at org.apache.xerces.impl.XMLErrorReporter.reportError(Unknown Source)
	at org.apache.xerces.impl.XMLScanner.reportFatalError(Unknown Source)
	at org.apache.xerces.impl.XMLDocumentScannerImpl$PrologDispatcher.dispatch(Unknown Source)
	at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)
	at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
	at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
	at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
	at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)
	at org.eclipse.lemminx.extensions.contentmodel.participants.diagnostics.XMLValidator.parseXML(XMLValidator.java:129)
	at org.eclipse.lemminx.extensions.contentmodel.participants.diagnostics.XMLValidator.doDiagnostics(XMLValidator.java:100)
	at org.eclipse.lemminx.extensions.contentmodel.participants.diagnostics.ContentModelDiagnosticsParticipant.doDiagnostics(ContentModelDiagnosticsParticipant.java:50)
	at org.eclipse.lemminx.services.XMLDiagnostics.doExtensionsDiagnostics(XMLDiagnostics.java:58)
	at org.eclipse.lemminx.services.XMLDiagnostics.doDiagnostics(XMLDiagnostics.java:41)
	at org.eclipse.lemminx.services.XMLLanguageService.doDiagnostics(XMLLanguageService.java:161)
	at org.eclipse.lemminx.services.XMLLanguageService.publishDiagnostics(XMLLanguageService.java:170)
	at org.eclipse.lemminx.XMLTextDocumentService.validate(XMLTextDocumentService.java:512)
	at org.eclipse.lemminx.XMLTextDocumentService.lambda$triggerValidationFor$26(XMLTextDocumentService.java:505)
	at java.base/java.util.concurrent.CompletableFuture$UniAccept.tryFire(CompletableFuture.java:714)
	at java.base/java.util.concurrent.CompletableFuture$Completion.exec(CompletableFuture.java:479)
	at java.base/java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:290)
	at java.base/java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1020)
	at java.base/java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1656)
	at java.base/java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1594)
	at java.base/java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:183)

[Error - 11:41:58