sigsegv on porter stemmer (Lucene, but also otherwise)

Dawid Weiss dawid.weiss at
Mon Jul 25 12:26:18 PDT 2011

Thanks for feedback and the workaround, Vladimir. The credits for
finding the bug and reproducing it should go to Robert Muir and Uwe
Schindler, I'm merely a messenger, but I had a feeling you'd be
interested :)


On Mon, Jul 25, 2011 at 7:49 PM, Vladimir Kozlov
<vladimir.kozlov at> wrote:
> Thank you very much, Dawid, for providing the test case. Bug was filed in
> wrong category so we did not know about it. I will work on it since it could
> be my changes in loop optimizations. Use next flag as workaround:
> -XX:-UseLoopPredicate
> Thanks,
> Vladimir
> Dawid Weiss wrote:
>> Hello everyone,
>> I am an Apache Lucene developer, we've been running tests with Java
>> 1.7 and this came up:
>> Porter stemmer is pretty widely used for shallow NLP, not only in
>> Lucene. It'd be interesting to hear from jit gurus what's causing this
>> (the problem does not occur in 1.6). Thanks in advance,
>> Dawid

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