hg: jdk10/client/jdk: 8182577: Exception when Tab key moves focus to a JCheckbox with a custom ButtonModel

[prasanta.sadhukhan at oracle.com]

Changeset: e1e784e7fe35
Author:    psadhukhan
Date:      2017-07-01 10:00 +0530
URL:       http://hg.openjdk.java.net/jdk10/client/jdk/rev/e1e784e7fe35

8182577: Exception when Tab key moves focus to a JCheckbox with a custom ButtonModel
Reviewed-by: ssadetsky, serb, kcr

! src/java.desktop/share/classes/javax/swing/ButtonModel.java
! src/java.desktop/share/classes/javax/swing/JToggleButton.java
! src/java.desktop/share/classes/javax/swing/LayoutFocusTraversalPolicy.java
+ test/javax/swing/DefaultButtonModel/DefaultButtonModelCrashTest.java