Too many logs after completion, hover with XML that contains DTD subset

[angelozerr]

Create a XML with DTD subset which have error like this:

<!DOCTYPE root-element [
  <!ELEMENT root-element (#PCDATA)>
  XXXXXXX
]>
<root-element>
  |
</root-element>

Open completion inside root-element, you should see 2 errors logs:

• the first:

[Trace - 09:09:55] Received notification 'window/logMessage'.
Params: {
    "type": 1,
    "message": "May 30, 2020 09:09:55 org.eclipse.lemminx.extensions.dtd.contentmodel.CMDTDContentModelProvider createInternalCMDocument()\r\nMessage: Error while loading DOCTYPE subset\r\n::::3:3:41:The 
...

• the second:

[Error - 09:09:55] May 30, 2020 09:09:55 org.eclipse.lemminx.extensions.dtd.contentmodel.CMDTDContentModelProvider createInternalCMDocument()
Message: Error while loading DOCTYPE subset
::::3:3:41:The markup declarations contained or pointed to by the document type declaration must be well-formed.
	at org.apache.xerces.impl.XMLErrorReporter.reportError(Unknown Source)
	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.XMLDTDScannerImpl.scanDecls(Unknown Source)
...

Those 2 logs comes from of loading of CMDocument (to manage XML completion, hover based on DTD subset when subset declares <!ELEMENT). The load of CMDocument should never report errors.