Segfault with parse-xml:parse() and file:read-text()

[Chris Hillery]

The query and input file are attached. Save them to the same directory and run repro.xq with Zorba.

The query is probably weird because the following:

  return $foo/[@testCaseName eq "Catalog001"]

probably should not have the / in it to get the desired behaviour of selecting elements with the corresponding attributes. However, of course Zorba should not crash. And, in fact, the query should be valid; if you replace the file:read-text() call with the actual string content of failures.xml, then the query runs OK and produces the output "[ true ]", so the bug has something to do with parsing the result of file:read-text().

[Chris Hillery (ceejatec)]

Matthias, any idea who best to assign this bug to?

[Matthias Brantner (matthias-brantner)]

Assigning to Nicolae. It seems to be a problem in the parse function if the option <opt:parse-external-parsed-entity/> is specified. In this case, the node returned by the parse function contains an invalid tree pointer.

I think that it is a severe bug because the nodes returned by the parser function seem to be useless. That's why I marked it for 2.8 but it shouldn't hold up the release.

[Matthias Brantner (matthias-brantner)]

The stack trace of the crash is as follows:

(gdb) where
#0 0x00007ffff74b9d52 in zorba::simplestore::XmlTree::getCollectionId (this=0x201) at /home/mbrantner/zorba/sandbox/src/store/naive/node_items.cpp:137
#1 0x00007ffff752850f in zorba::simplestore::XmlNode::getCollectionId (this=0x7c3da0) at /home/mbrantner/zorba/sandbox/src/store/naive/node_items.h:507
#2 0x00007ffff75285c4 in zorba::simplestore::XmlNode::compare2 (this=0x7c3da0, other=0x750d20) at /home/mbrantner/zorba/sandbox/src/store/naive/node_items.h:1598
#3 0x00007ffff75298d2 in zorba::simplestore::StoreNodeSortIterator::ComparisonFunction::operator() (this=0x7fffffffce6f, n1=0x7c3da0, n2=0x750d20) at /home/mbrantner/zorba/sandbox/src/store/naive/node_iterators.h:452
#4 0x00007ffff752afb2 in std::__insertion_sort<__gnu_cxx::__normal_iterator<zorba::simplestore::XmlNode**, std::vector<zorba::simplestore::XmlNode*, std::allocator<zorba::simplestore::XmlNode*> > >, zorba::simplestore::StoreNodeSortIterator::ComparisonFunction> (__first=..., __last=..., __comp=...) at /usr/include/c++/4.6/bits/stl_algo.h:2129
#5 0x00007ffff752a99d in std::__final_insertion_sort<__gnu_cxx::__normal_iterator<zorba::simplestore::XmlNode**, std::vector<zorba::simplestore::XmlNode*, std::allocator<zorba::simplestore::XmlNode*> > >, zorba::simplestore::StoreNodeSortIterator::ComparisonFunction> (__first=..., __last=..., __comp=...) at /usr/include/c++/4.6/bits/stl_algo.h:2201
#6 0x00007ffff752a335 in std::sort<__gnu_cxx::__normal_iterator<zorba::simplestore::XmlNode**, std::vector<zorba::simplestore::XmlNode*, std::allocator<zorba::simplestore::XmlNode*> > >, zorba::simplestore::StoreNodeSortIterator::ComparisonFunction> (__first=..., __last=..., __comp=...) at /usr/include/c++/4.6/bits/stl_algo.h:5447
#7 0x00007ffff752829f in zorba::simplestore::StoreNodeSortOrAtomicIterator::next (this=0x7378b0, result=...) at /home/mbrantner/zorba/sandbox/src/store/naive/node_iterators.cpp:438
#8 0x00007ffff72147d3 in zorba::NodeSortIterator::nextImpl (this=0x761a40, result=..., planState=...) at /home/mbrantner/zorba/sandbox/src/runtime/core/nodeid_iterators.cpp:164
#9 0x00007ffff6fab3a9 in zorba::Batcher<zorba::NodeSortIterator>::produceNext (this=0x761a40, result=..., planState=...) at /home/mbrantner/zorba/sandbox/src/runtime/base/plan_iterator.h:535
#10 0x00007ffff71a7763 in zorba::PlanIterator::consumeNext (result=..., iter=0x761a40, planState=...) at /home/mbrantner/zorba/sandbox/src/runtime/base/plan_iterator.cpp:109
#11 0x00007ffff71a70f9 in zorba::PlanWrapper::next (this=0x737180, result=...) at /home/mbrantner/zorba/sandbox/src/runtime/api/plan_wrapper.cpp:151
#12 0x00007ffff6a9ee93 in zorba::serializer::serialize (this=0x7fffffffd300, aObject=..., aOStream=..., aHandler=0x0, aEmitAttributes=false) at /home/mbrantner/zorba/sandbox/src/api/serialization/serializer.cpp:2676
#13 0x00007ffff6a9eba9 in zorba::serializer::serialize (this=0x7fffffffd300, aObject=..., aOStream=..., aEmitAttributes=false) at /home/mbrantner/zorba/sandbox/src/api/serialization/serializer.cpp:2625
#14 0x00007ffff6a384ff in zorba::XQueryImpl::serialize (this=0x718710, os=..., aWrapper=..., opt=0x7fffffffd6d0) at /home/mbrantner...