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java.lang.IndexOutOfBoundsException: Index: 3, Size: 3	at java.util.ArrayList.rangeCheck(ArrayList.java:653)	at java.util.ArrayList.get(ArrayList.java:429)	at java.awt.Container.createHierarchyEvents(Container.java:1441)	at java.awt.Container.createHierarchyEvents(Container.java:1441)	at java.awt.Container.createHierarchyEvents(Container.java:1441)	at java.awt.Container.createHierarchyEvents(Container.java:1441)	at java.awt.Container.createHierarchyEvents(Container.java:1441)	at java.awt.Dialog.conditionalShow(Dialog.java:953)	at java.awt.Dialog.show(Dialog.java:1037)	at java.awt.Component.show(Component.java:1673)	at java.awt.Component.setVisible(Component.java:1625)	at java.awt.Window.setVisible(Window.java:1014)	at java.awt.Dialog.setVisible(Dialog.java:1005)	at net.sf.jabref.gui.importer.fetcher.GeneralFetcher.lambda$actionPerformed$171(GeneralFetcher.java:220)	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)	at java.lang.Thread.run(Thread.java:745)