[Help-smalltalk] [BUG] PositionableStream and FileStream not compatible

[Markus Fritsche]

XML XMLParser processDocumentInFilename: 't.xml' beforeScanDo: [ :x | x 
validate: false ] !

XML XMLParser processDocumentString: (File name: 't.xml') readStream 
contents beforeScanDo: [ :x | x validate: false ] !

I think this is due to the fact that ptr equals 0 in FileStream, while 
adjustable in PositionableStream
<?xml version="1.0"?>
 <prompt>
  <greeting>Hello World</greeting>
 </prompt>