Exception when computing read-repair for range tombstones

java.lang.IllegalStateException: null
	at org.apache.cassandra.db.rows.RangeTombstoneBoundMarker.openDeletionTime(RangeTombstoneBoundMarker.java:87) ~[apache-cassandra-3.5.jar:3.5]
	at org.apache.cassandra.service.DataResolver$RepairMergeListener$MergeListener.onMergedRangeTombstoneMarkers(DataResolver.java:275) ~[apache-cassandra-3.5.jar:3.5]
	at org.apache.cassandra.db.rows.UnfilteredRowIterators$UnfilteredRowMergeIterator$MergeReducer.getReduced(UnfilteredRowIterators.java:482) ~[apache-cassandra-3.5.jar:3.5]
	at org.apache.cassandra.db.rows.UnfilteredRowIterators$UnfilteredRowMergeIterator$MergeReducer.getReduced(UnfilteredRowIterators.java:437) ~[apache-cassandra-3.5.jar:3.5]
	at org.apache.cassandra.utils.MergeIterator$ManyToOne.consume(MergeIterator.java:217) ~[apache-cassandra-3.5.jar:3.5]
	at org.apache.cassandra.utils.MergeIterator$ManyToOne.computeNext(MergeIterator.java:156) ~[apache-cassandra-3.5.jar:3.5]
	at org.apache.cassandra.utils.AbstractIterator.hasNext(AbstractIterator.java:47) ~[apache-cassandra-3.5.jar:3.5]
	at org.apache.cassandra.db.rows.UnfilteredRowIterators$UnfilteredRowMergeIterator.computeNext(UnfilteredRowIterators.java:419) ~[apache-cassandra-3.5.jar:3.5]
	at org.apache.cassandra.db.rows.UnfilteredRowIterators$UnfilteredRowMergeIterator.computeNext(UnfilteredRowIterators.java:279) ~[apache-cassandra-3.5.jar:3.5]
	at org.apache.cassandra.utils.AbstractIterator.hasNext(AbstractIterator.java:47) ~[apache-cassandra-3.5.jar:3.5]
	at org.apache.cassandra.db.transform.BaseRows.hasNext(BaseRows.java:112) ~[apache-cassandra-3.5.jar:3.5]
	at org.apache.cassandra.cql3.statements.SelectStatement.processPartition(SelectStatement.java:720) ~[apache-cassandra-3.5.jar:3.5]
	at org.apache.cassandra.cql3.statements.SelectStatement.process(SelectStatement.java:659) ~[apache-cassandra-3.5.jar:3.5]
	at org.apache.cassandra.cql3.statements.SelectStatement.processResults(SelectStatement.java:382) ~[apache-cassandra-3.5.jar:3.5]
	at org.apache.cassandra.cql3.statements.SelectStatement.execute(SelectStatement.java:335) ~[apache-cassandra-3.5.jar:3.5]
	at org.apache.cassandra.cql3.statements.SelectStatement.execute(SelectStatement.java:209) ~[apache-cassandra-3.5.jar:3.5]
	at org.apache.cassandra.cql3.statements.SelectStatement.execute(SelectStatement.java:76) ~[apache-cassandra-3.5.jar:3.5]
	at org.apache.cassandra.cql3.QueryProcessor.processStatement(QueryProcessor.java:206) ~[apache-cassandra-3.5.jar:3.5]
	at org.apache.cassandra.cql3.QueryProcessor.processPrepared(QueryProcessor.java:472) ~[apache-cassandra-3.5.jar:3.5]
	at org.apache.cassandra.cql3.QueryProcessor.processPrepared(QueryProcessor.java:449) ~[apache-cassandra-3.5.jar:3.5]
	at org.apache.cassandra.transport.messages.ExecuteMessage.execute(ExecuteMessage.java:130) ~[apache-cassandra-3.5.jar:3.5]
	at org.apache.cassandra.transport.Message$Dispatcher.channelRead0(Message.java:507) [apache-cassandra-3.5.jar:3.5]
	at org.apache.cassandra.transport.Message$Dispatcher.channelRead0(Message.java:401) [apache-cassandra-3.5.jar:3.5]
	at io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:105) [netty-all-4.0.23.Final.jar:4.0.23.Final]
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:333) [netty-all-4.0.23.Final.jar:4.0.23.Final]
	at io.netty.channel.AbstractChannelHandlerContext.access$700(AbstractChannelHandlerContext.java:32) [netty-all-4.0.23.Final.jar:4.0.23.Final]
	at io.netty.channel.AbstractChannelHandlerContext$8.run(AbstractChannelHandlerContext.java:324) [netty-all-4.0.23.Final.jar:4.0.23.Final]
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [na:1.8.0_91]
	at org.apache.cassandra.concurrent.AbstractLocalAwareExecutorService$FutureTask.run(AbstractLocalAwareExecutorService.java:164) [apache-cassandra-3.5.jar:3.5]
	at org.apache.cassandra.concurrent.SEPWorker.run(SEPWorker.java:105) [apache-cassandra-3.5.jar:3.5]
	at java.lang.Thread.run(Thread.java:745) [na:1.8.0_91]

java.lang.RuntimeException: com.datastax.driver.core.exceptions.TransportException: [/172.20.202.193] Connection has been closed