Michael, do you have a test case which demonstrates the error? I can't
reproduce it, and I don't want to touch that code without a test case.
On Thu, Jan 22, 2015 at 4:04 PM, Michael Michaud <
[email protected]> wrote:
> Hi Martin,
>
> I get this error with the Buffer function (here after the full stacktrace).
> This is related to the new TimSort algorithm which is now the default one.
> It is probably caused by the
> SubgraphDepthLocater#DepthSegment compareTo function
> which is not transitive
> I don't know the reason why this comparator is implemented this way,
> but I think it could help if it could be made transitive.
>
> Michaël
>
> PS the java parameter -Djava.util.Arrays.useLegacyMergeSort=true
> helps to fix the problem, but I think it is not a long term solution.
>
> Caused by: java.lang.IllegalArgumentException: Comparison method violates
> its general contract!
> at java.util.ComparableTimSort.mergeLo(ComparableTimSort.java:740)
> at java.util.ComparableTimSort.mergeAt(ComparableTimSort.java:477)
> at
> java.util.ComparableTimSort.mergeForceCollapse(ComparableTimSort.java:418)
> at java.util.ComparableTimSort.sort(ComparableTimSort.java:218)
> at java.util.Arrays.sort(Arrays.java:1312)
> at java.util.Arrays.sort(Arrays.java:1506)
> at java.util.ArrayList.sort(ArrayList.java:1454)
> at java.util.Collections.sort(Collections.java:141)
> at
> com.vividsolutions.jts.operation.buffer.SubgraphDepthLocater.getDepth(SubgraphDepthLocater.java:66)
> at
> com.vividsolutions.jts.operation.buffer.BufferBuilder.buildSubgraphs(BufferBuilder.java:289)
> at
> com.vividsolutions.jts.operation.buffer.BufferBuilder.buffer(BufferBuilder.java:156)
> at
> com.vividsolutions.jts.operation.buffer.BufferOp.bufferFixedPrecision(BufferOp.java:368)
> at
> com.vividsolutions.jts.operation.buffer.BufferOp.bufferReducedPrecision(BufferOp.java:356)
> at
> com.vividsolutions.jts.operation.buffer.BufferOp.bufferReducedPrecision(BufferOp.java:320)
> at
> com.vividsolutions.jts.operation.buffer.BufferOp.computeGeometry(BufferOp.java:312)
> at
> com.vividsolutions.jts.operation.buffer.BufferOp.getResultGeometry(BufferOp.java:299)
> at
> com.vividsolutions.jts.operation.buffer.BufferOp.bufferOp(BufferOp.java:175)
> at com.vividsolutions.jts.geom.Geometry.buffer(Geometry.java:1176)
>
>
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