[Exist-open] Bug Report in eXist-0.9

[Shahid M. <sh...@st...>]

Dear,

I have found a bug in eXist-0.9. Exist make a exception when
my XPath query (collection('temp')/omdoc/theory/*[@id='aaa']) on  the
following xml file.

<?xml version='1.0' encoding='UTF-8' ?>
<omdoc>
  <theory>
    <omtext id='a1'>
	 <omlet id = 'd'> //this element existance cause of exception
	 </omlet>
    </omtext>
  </theory>
</omdoc>

It produces the following expception:

java.lang.NullPointerException: cannot compare null values
        at
org.exist.dom.NodeProxy$NodeProxyComparator.compare(NodeProxy.java:33
0)
        at org.exist.dom.NodeProxy.compareTo(NodeProxy.java:142)
        at org.exist.dom.ArraySet.search(ArraySet.java:141)
        at org.exist.dom.ArraySet.contains(ArraySet.java:303)
        at
org.exist.dom.VirtualNodeSet.addInternal(VirtualNodeSet.java:155)
        at
org.exist.dom.VirtualNodeSet.nodeHasParent(VirtualNodeSet.java:148)
        at org.exist.dom.NodeSet.getChildren(NodeSet.java:147)
        at org.exist.dom.ArraySet.getChildren(ArraySet.java:382)
        at
org.exist.xpath.LocationStep.getAttributes(LocationStep.java:148)
        at org.exist.xpath.LocationStep.eval(LocationStep.java:111)
        at org.exist.xpath.OpEquals.nodeSetCompare(OpEquals.java:235)
        at org.exist.xpath.OpEquals.eval(OpEquals.java:194)
        at org.exist.xpath.PathExpr.eval(PathExpr.java:131)
        at org.exist.xpath.Predicate.eval(Predicate.java:57)
        at
org.exist.xpath.LocationStep.applyPredicate(LocationStep.java:82)
        at org.exist.xpath.LocationStep.eval(LocationStep.java:116)
        at org.exist.xpath.PathExpr.eval(PathExpr.java:131)
        at
org.exist.xmldb.LocalXPathQueryService.doQuery(LocalXPathQueryService
.java:121)
        at
org.exist.xmldb.LocalXPathQueryService.query(LocalXPathQueryService.j
ava:87)
        at org.exist.InteractiveClient.find(InteractiveClient.java:838)
        at org.exist.InteractiveClient.process(InteractiveClient.java:494)
        at org.exist.InteractiveClient.run(InteractiveClient.java:1412)
        at org.exist.InteractiveClient.main(InteractiveClient.java:284)

This is the least input file that I have provided it. It does not make
any exception on element names but on the mention struture. I have tested
it with my different test cases but result is same. I have commented out
the minmal error cuase in the input file.

My operating System Info:

Suse Linux 7.2

Please write me feed back about the bug report.


Shahid Manzoor
Saarland Univeristy