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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