Robert Muir created LUCENE-7032:
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Summary: jdk-9-ea+105 breaks MinimizeOperations.minimize()
Key: LUCENE-7032
URL: https://issues.apache.org/jira/browse/LUCENE-7032
Project: Lucene - Core
Issue Type: Bug
Reporter: Robert Muir
As soon as jdk-9-ea+105 was put into test rotation, automaton tests have been
sporatically failing in non-reproducible ways. All of them invoke hopcroft
minimization either directly or indirectly.
The bug manifests in several forms:
* ArrayIndexOutOfBoundsException in minimize()
* IllegalArgumentException for an explicit bounds check
* incorrect resulting automaton
This method is ... let's say not the ideal one to debug something like this,
but I've at least got it where I can make it fail in a few minutes with
beasting, so we can try simple things like turning on/off jvm flags to try to
narrow it more.
It would be really great to make it fail more efficiently, but unfortunately it
takes many thousands of iterations until we understand more about it.
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