Unhandled event loop exception, java.lang.NullPointerException giving invalid score or empty values while add rule

[brita-sed]

Precondition

• .../eclipse.exe has launched.
• iFL plugin has been installed.

Steps

1. Select a project.
2. Click iFL button.
3. Load scores.
4. Add rule.
5. Select scores, give an invalid value, for example 2.
6. Click Add button.

Expected results

• Input number is out of range error message and no exception in log.

Received results

• The error popup was right, but the log contains exception:

  !ENTRY org.eclipse.ui 4 0 2021-05-11 10:56:43.151
  !MESSAGE Unhandled event loop exception
  !STACK 0
  java.lang.NullPointerException
  at org.eclipse.sed.ifl.ide.gui.rulecreator.NegatableRuleCreator.getRule(NegatableRuleCreator.java:77)
  at org.eclipse.sed.ifl.ide.gui.dialogs.RuleCreatorDialog$1.widgetSelected(RuleCreatorDialog.java:95)
  at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:252)
  at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:89)
  at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4173)
  at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1057)
  at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3986)

  Full log file: unhandled_nullpointer_log.txt

Environment:

• Package: https://github.com/InteractiveFaultLocalization/iFL4Eclipse/releases/tag/V2.6
• Operating System: Windows 10 Pro, 64 bit
• Eclipse version: 2019-09 R (4.13.0)

[brita-sed]

The problem is the same if we add empty strings for rules:

[Dhorvath1294]

https://github.com/InteractiveFaultLocalization/iFL4Eclipse/releases/tag/V3.0.206.1

[brita-sed]

There wasn't any error in log, the bug has been corrected.