Error in rendering result

[dzmipt]

Played with such object:
get `:test1/ set ([] qqq:1.1 2.2 3.3 4.4 5.5; c:{ ([] a:x+til 3; b: til 3)} each til 5)

Got the following Exception:
Error occurred during query execution: kx.c$K4Exception: type kx.c$K4Exception: type
at kx.c.k(c.java:678)
at kx.c$1.run(c.java:138)
at java.lang.Thread.run(Thread.java:748)

[dzmipt]

The issue exist in the latest c.java:
KxSystems/javakdb#51

[dzmiptdb]

Another way to have error (probably it is the same problem):
:sp/ set ([]a:1 2 3;b:10 20 30) k)+(ab)!/:.Q.dd[:.;:.],`sp

[dzmipt]

Another issue, which I think has similar roots. However it now is reproduced on rendering. The query `a`b!`x fails to render with the following exception
java.lang.ClassCastException: studio.kdb.K$KSymbol cannot be cast to studio.kdb.K$KBaseVector
at studio.kdb.DictTableModel.getColumn(DictTableModel.java:48) ~[main/:?]
at studio.kdb.KTableModel.getValueAt(KTableModel.java:89) ~[main/:?]
at javax.swing.JTable.getValueAt(JTable.java:2720) ~[?:1.8.0_251]
at studio.ui.WidthAdjuster.resize(WidthAdjuster.java:100) ~[main/:?]
at studio.ui.WidthAdjuster.resizeAllColumns(WidthAdjuster.java:78) ~[main/:?]
at studio.ui.QGrid.(QGrid.java:131) ~[main/:?]
at studio.ui.TabPanel.initComponents(TabPanel.java:61) ~[main/:?]
at studio.ui.TabPanel.(TabPanel.java:30) ~[main/:?]
at studio.ui.StudioPanel.queryExecutionComplete(StudioPanel.java:1910) ~[main/:?]
at studio.ui.action.QueryExecutor$Worker.done(QueryExecutor.java:173) [main/:?]
at javax.swing.SwingWorker$5.run(SwingWorker.java:737) [?:1.8.0_251]
at javax.swing.SwingWorker$DoSubmitAccumulativeRunnable.run(SwingWorker.java:832) [?:1.8.0_251]
at sun.swing.AccumulativeRunnable.run(AccumulativeRunnable.java:112) [?:1.8.0_251]
at javax.swing.SwingWorker$DoSubmitAccumulativeRunnable.actionPerformed(SwingWorker.java:842) [?:1.8.0_251]
at javax.swing.Timer.fireActionPerformed(Timer.java:313) [?:1.8.0_251]
at javax.swing.Timer$DoPostEvent.run(Timer.java:245) [?:1.8.0_251]
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311) [?:1.8.0_251]
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758) [?:1.8.0_251]
at java.awt.EventQueue.access$500(EventQueue.java:97) [?:1.8.0_251]
at java.awt.EventQueue$3.run(EventQueue.java:709) [?:1.8.0_251]
at java.awt.EventQueue$3.run(EventQueue.java:703) [?:1.8.0_251]
at java.security.AccessController.doPrivileged(Native Method) ~[?:1.8.0_251]
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:74) [?:1.8.0_251]
at java.awt.EventQueue.dispatchEvent(EventQueue.java:728) [?:1.8.0_251]
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:205) [?:1.8.0_251]
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116) [?:1.8.0_251]
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105) [?:1.8.0_251]
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101) [?:1.8.0_251]
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93) [?:1.8.0_251]
at java.awt.EventDispatchThread.run(EventDispatchThread.java:82) [?:1.8.0_251]