ioanatia commented on issue #11829:
URL: https://github.com/apache/lucene/issues/11829#issuecomment-1413856068

   the test fails because right from the start the random generated polygon is 
invalid:
   
   
https://github.com/apache/lucene/blob/5acca826330b2afc15b6a2d5e2134d7d1a64e4a9/lucene/core/src/test/org/apache/lucene/document/TestShapeDocValues.java#L89
   
   we can modify `BaseXYShapeTestCase.ShapeType.POLYGON.nextShape()` to always 
return a polygon that would not fail the  self intersections check:
   
   
https://github.com/apache/lucene/blob/5acca826330b2afc15b6a2d5e2134d7d1a64e4a9/lucene/core/src/test/org/apache/lucene/document/BaseXYShapeTestCase.java#L229
   
   if we change `random().nextBoolean()` to `true` - the test succeeds when 
it's run with the same seed like in the PR description.
   it looks like this is a safe change since `POLYGON.nextShape()` has limited 
usage.
   


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