java.lang.IllegalStateException is thrown when excuting regression test with jtreg 4.0.

Output
======
Exception in thread "ReadAheadIterator0" java.lang.IllegalStateException
        at com.sun.javatest.TestResult.setTestDescription(TestResult.java:1882)
        at com.sun.javatest.TestResultTable.getCachedResult(TestResultTable.java :2159)
        at com.sun.javatest.TRT_TreeNode.processFile(TRT_TreeNode.java:1045)
        at com.sun.javatest.TRT_TreeNode.scanIfNeeded(TRT_TreeNode.java:639)
        at com.sun.javatest.TRT_TreeNode.getChildCount(TRT_TreeNode.java:113)
        at com.sun.javatest.TRT_Iterator$PseudoFrame.nextIndex(TRT_Iterator.java :904)
        at com.sun.javatest.TRT_Iterator.findNext(TRT_Iterator.java:599)
        at com.sun.javatest.TRT_Iterator.nextElement(TRT_Iterator.java:179)
        at com.sun.javatest.TRT_Iterator.next(TRT_Iterator.java:200)
        at com.sun.javatest.util.ReadAheadIterator.readAhead(ReadAheadIterator.j ava:258)
        at com.sun.javatest.util.ReadAheadIterator.access$000(ReadAheadIterator. java:36)
        at com.sun.javatest.util.ReadAheadIterator$1.run(ReadAheadIterator.java: 192)


To Reproduce:
============
/java/re/jtreg/4.0/promoted/latest/binaries/jtreg/win32/bin/jtreg \
-cpa:/net/sqenfs-2/export2/stt/cady_dtf/unified/knight-ws/suites/regression/Jemmy/jemmy.jar \
-timeout:2 \
-a \
-r:/tmp/reportDir \
-w:/tmp/workDir \
/java/re/jdk/6u10/latest/ws/j2se/test