In case of bigger projects Unhandled event loop exception, org.eclipse.swt.SWTError: No more handles error occurs

Precondition

GremlinServer is running.
.../eclipse.exe has launched.
Key files are in the .../eclipse/ directory.
iFL plugin has been installed.

Steps

Select a bigger project (joda-time).
Click iFL button.
Load scores.
Select an item, then right click.
Click Custom feedback... button.
Made some action with methods, set different values etc.

Expected results

The plugin can handle bigger projects too.

Received results

Sometimes the following error I get, and Eclipse closes:

org.eclipse.swt.SWTError: No more handles
at org.eclipse.sed.ifl.ide.gui.element.ScoreSetter.createGlyph(ScoreSetter.java:110)
at org.eclipse.sed.ifl.ide.gui.element.ScoreSetter.displayCurrentScoreDistribution(ScoreSetter.java:104)
at org.eclipse.sed.ifl.view.ScoreSetterView.displayCurrentScoreDistribution(ScoreSetterView.java:60)
at org.eclipse.sed.ifl.control.feedback.ScoreSetterControl.lambda$0(ScoreSetterControl.java:58)
at org.eclipse.sed.ifl.util.event.core.ListenerCollection.invoke(ListenerCollection.java:33)
at org.eclipse.sed.ifl.model.user.interaction.ScoreSetterModel.updateSubjects(ScoreSetterModel.java:45)
at org.eclipse.sed.ifl.control.feedback.ScoreSetterControl.lambda$2(ScoreSetterControl.java:81)
at org.eclipse.sed.ifl.util.event.core.ListenerCollection.invoke(ListenerCollection.java:33)
at org.eclipse.sed.ifl.view.ScoreSetterView.lambda$0(ScoreSetterView.java:80)
at org.eclipse.sed.ifl.util.event.core.ListenerCollection.invoke(ListenerCollection.java:33)

Full log file: unhandled_event_loop_log.txt

Environment:

Package: https://github.com/sed-szeged/iFL4Eclipse/releases/tag/CustomFeedbackTestV1.0
Operating System: Windows 10 Pro, 64 bit
Eclipse version: 2019-09 R (4.13.0)

InteractiveFaultLocalization / iFL4Eclipse

In case of bigger projects Unhandled event loop exception, org.eclipse.swt.SWTError: No more handles error occurs #89