Nullpointer-Exception in Select-Statement

The following statement on a remote database throws the shown exception:

use s12db1;
select * from machines;

Exception shown in Netbeans Notifications:

java.lang.NullPointerException
at org.mariadb.jdbc.internal.queryresults.resultset.MariaSelectResultSet.close(MariaSelectResultSet.java:483)
at org.netbeans.modules.db.dataview.util.DataViewUtils.closeResources(DataViewUtils.java:195)
at org.netbeans.modules.db.dataview.meta.DBMetaDataFactory.getForeignKeys(DBMetaDataFactory.java:179)
at org.netbeans.modules.db.dataview.meta.DBMetaDataFactory.checkForeignKeys(DBMetaDataFactory.java:408)
at org.netbeans.modules.db.dataview.meta.DBMetaDataFactory.postprocessTables(DBMetaDataFactory.java:320)
[catch] at org.netbeans.modules.db.dataview.output.SQLExecutionHelper$1Loader.run(SQLExecutionHelper.java:174)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1443)
at org.netbeans.modules.openide.util.GlobalLookup.execute(GlobalLookup.java:68)
at org.openide.util.lookup.Lookups.executeWith(Lookups.java:303)
at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2058)

Error does not occur in version 1.5.5.