getMaxVersionFromIndex is throwing an NPE if some segments are not current

java.lang.NullPointerException
	at org.apache.lucene.util.NumericUtils.prefixCodedToLong(NumericUtils.java:226)
	at org.apache.lucene.util.NumericUtils.getMaxLong(NumericUtils.java:582)
	at org.apache.solr.update.VersionInfo.getMaxVersionFromIndex(VersionInfo.java:234)
	at org.apache.solr.update.UpdateLog.seedBucketsWithHighestVersion(UpdateLog.java:1580)
	at org.apache.solr.update.UpdateLog.seedBucketsWithHighestVersion(UpdateLog.java:1610)
	at org.apache.solr.core.SolrCore.seedVersionBuckets(SolrCore.java:861)
	at org.apache.solr.core.SolrCore.<init>(SolrCore.java:843)
	at org.apache.solr.core.SolrCore.<init>(SolrCore.java:658)
	at org.apache.solr.core.CoreContainer.create(CoreContainer.java:637)
	at org.apache.solr.core.CoreContainer$1.call(CoreContainer.java:381)
	at org.apache.solr.core.CoreContainer$1.call(CoreContainer.java:375)
	at java.util.concurrent.FutureTask.run(FutureTask.java:262)
	at org.apache.solr.common.util.ExecutorUtil$MDCAwareThreadPoolExecutor$1.run(ExecutorUtil.java:148)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at java.lang.Thread.run(Thread.java:745)