Assert in NsDom.cpp from dbxml 2.3.8

Question

I was able to temporarily workaround my previous assert problems by including the function declarations inline, rather than in a separate file. That got me a little farther, but I hit another assert.
Sorry if I just keep finding new ways to harp on the same bug.
Here is the error:
Assertion failed: tmp == first, NsDom.cpp:1015
Here is the query:
declare namespace model = "http://bpointsys.com/model";
declare ordering ordered;
declare function model:getModel($root as element()*,$name as xs:string)
as element()?
if ($root/testmodel[@name=$name]) then
let $dataset := collection()/testdata[string(@modelname)=$name]
let $max := max($dataset/@iteration)
let $lastrun := $dataset[@iteration=$max][1]
for $m in $root/testmodel[@name=$name]
return element { fn:local-name($m) } {
$m/../@class,
$m/@*,
attribute lastrun {
string($lastrun/@endtime)
attribute lastrunby {
string(collection()/config:config/auth/users/user[string(@id) =
                    string ($lastrun/@user)]/@name)
attribute result {
string($lastrun/@result)
$m/node()
else
model:getModel(collection()/(testmodel:testmodels|testmodel:cannedmodels),$name)

Answer 1

I get a similar assert for this much simpler query when running as a 'removeStep' in an xmodify operation on a document.
[kraney@future control]$ rlwrap dbxml
Joined existing environment
dbxml> open config.dbxml
dbxml> setNamespace testmodel "http://bpointsys.com/schema/testmodel"
Binding testmodel -> http://bpointsys.com/schema/testmodel
dbxml> getDoc testmodels
1 documents found
dbxml> contextQuery "//workingCopy[@user='dev' and @instance='']"
2 objects returned for expression '//workingCopy[@user='dev' and @instance='']'
dbxml> removeNodes "/testmodel:testmodels/workingCopy[@user='dev' and @instance='']"
Removing nodes: /testmodel:testmodels/workingCopy[@user='dev' and @instance='']
Assertion failed: !next || (next->_nsElemPrev == this), NsDom.cpp:1312
Also,
dbxml> removeNodes "//workingCopy[@user='dev' and @instance='']"
Removing nodes: //workingCopy[@user='dev' and @instance='']
Assertion failed: !next || (next->_nsElemPrev == this), NsDom.cpp:1312