Drop append from MarkupParserCommon.xTakeUntil to study OOM

Exception in thread "XMLEventReader" java.lang.OutOfMemoryError: Java heap space
    at java.util.Arrays.copyOf(Arrays.java:3332)
    at java.lang.AbstractStringBuilder.expandCapacity(AbstractStringBuilder.java:137)
    at java.lang.AbstractStringBuilder.ensureCapacityInternal(AbstractStringBuilder.java:121)
    at java.lang.AbstractStringBuilder.append(AbstractStringBuilder.java:622)
    at java.lang.StringBuilder.append(StringBuilder.java:202)
    at scala.collection.mutable.StringBuilder.append(StringBuilder.scala:267)
    at scala.xml.parsing.MarkupParserCommon.xTakeUntil(MarkupParserCommon.scala:253)
    at scala.xml.parsing.MarkupParserCommon.xTakeUntil$(MarkupParserCommon.scala:238)
    at scala.xml.pull.XMLEventReader$Parser.xTakeUntil(XMLEventReader.scala:60)
    at scala.xml.parsing.MarkupParser.xCharData(MarkupParser.scala:379)
    at scala.xml.parsing.MarkupParser.xCharData$(MarkupParser.scala:373)
    at scala.xml.pull.XMLEventReader$Parser.xCharData(XMLEventReader.scala:60)
    at scala.xml.parsing.MarkupParser.content1(MarkupParser.scala:424)
    at scala.xml.parsing.MarkupParser.content1$(MarkupParser.scala:419)
    at scala.xml.pull.XMLEventReader$Parser.content1(XMLEventReader.scala:60)
    at scala.xml.parsing.MarkupParser.content(MarkupParser.scala:459)
    at scala.xml.parsing.MarkupParser.content$(MarkupParser.scala:442)
    at scala.xml.pull.XMLEventReader$Parser.content(XMLEventReader.scala:60)
    at scala.xml.parsing.MarkupParser.element1(MarkupParser.scala:588)
    at scala.xml.parsing.MarkupParser.element1$(MarkupParser.scala:573)
    at scala.xml.pull.XMLEventReader$Parser.element1(XMLEventReader.scala:60)
    at scala.xml.parsing.MarkupParser.content1(MarkupParser.scala:433)
    at scala.xml.parsing.MarkupParser.content1$(MarkupParser.scala:419)
    at scala.xml.pull.XMLEventReader$Parser.content1(XMLEventReader.scala:60)
    at scala.xml.parsing.MarkupParser.document(MarkupParser.scala:247)
    at scala.xml.parsing.MarkupParser.document$(MarkupParser.scala:225)
    at scala.xml.pull.XMLEventReader$Parser.document(XMLEventReader.scala:60)
    at scala.xml.pull.XMLEventReader$Parser.$anonfun$run$1(XMLEventReader.scala:96)
    at scala.xml.pull.XMLEventReader$Parser$$Lambda$1241/610081892.apply(Unknown Source)
    at scala.xml.pull.ProducerConsumerIterator.interruptibly(XMLEventReader.scala:125)
    at scala.xml.pull.ProducerConsumerIterator.interruptibly$(XMLEventReader.scala:125)
    at scala.xml.pull.XMLEventReader.interruptibly(XMLEventReader.scala:27)

Author: ashawley

src/main/scala/scala/xml/parsing/MarkupParserCommon.scala

@@ -250,7 +250,6 @@ private[scala] trait MarkupParserCommon extends TokenTests {
         else if (ch == SU || eof)
           truncatedError("") // throws TruncatedXMLControl in compiler
 
-        sb append ch
         nextch()
       }
       unreachable