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https://issues.apache.org/jira/browse/LUCENE-3779?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Adrien Grand resolved LUCENE-3779.
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Resolution: Unresolved
MultiTermsEnum.java has changed a lot and this bug is not relevant anymore.
> An incomplete fix for the NPE bugs in MultipleTermPositions.java
> ----------------------------------------------------------------
>
> Key: LUCENE-3779
> URL: https://issues.apache.org/jira/browse/LUCENE-3779
> Project: Lucene - Core
> Issue Type: Bug
> Components: core/index
> Affects Versions: 3.0
> Reporter: Guangtai Liang
> Priority: Critical
> Original Estimate: 10m
> Remaining Estimate: 10m
>
> The fix revision 219387 (Fix for NPE (bug #35626). Fix by Hans Hjelm, test
> case by Scotty Allen.) was aimed to remove an NPE bug on the return value of
> "_termPositionsQueue.peek()" in the method "skipTo" of the file
> "/lucene/java/trunk/src/java/org/apache/lucene/index/MultipleTermPositions.java"
> , but it is incomplete.
> Since the returned value "_termPositionsQueue.peek()" could be null during
> the run-time execution, its value should also be null-checked before being
> dereferenced in other methods.
> The buggy code locations the same fix needs to be applied at are as bellows:
>
> Line 118, 124, 135 of the method "next()" :
> public final boolean next() throws IOException {
> if (_termPositionsQueue.size() == 0)
> return false;
> _posList.clear();
> [Line 118] _doc = _termPositionsQueue.peek().doc();
> TermPositions tp;
> do {
> tp = _termPositionsQueue.peek();
> [Line 124] for (int i = 0; i < tp.freq(); i++) {
> // NOTE: this can result in dup positions being added!
> _posList.add(tp.nextPosition());
> }
> if (tp.next())
> _termPositionsQueue.updateTop();
> else {
> _termPositionsQueue.pop();
> tp.close();
> }
> [Line 135] } while (_termPositionsQueue.size() > 0 &&
> _termPositionsQueue.peek().doc() == _doc);
> _posList.sort();
> _freq = _posList.size();
> return true;
> }
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