2e1ba684215fc86e800a611d8f5ea03f749b2269,plugins/org.eclipse.xtext.ui/src/org/eclipse/xtext/ui/editor/outline/actions/LinkWithEditorOutlineContribution.java,LinkWithEditorOutlineContribution,deregister,#OutlinePage#,62

Before Change


		super.deregister(outlinePage);
		OutlineWithEditorLinker outlineWithEditorLinker = page2linker.remove(outlinePage);
		outlineWithEditorLinker.deactivate();
		getPreferenceStoreAccess().getPreferenceStore().removePropertyChangeListener(outlineWithEditorLinker);
	}
	
}

After Change


	public void deregister(OutlinePage outlinePage) {
		super.deregister(outlinePage);
		OutlineWithEditorLinker outlineWithEditorLinker = page2linker.remove(outlinePage);
		if (outlineWithEditorLinker != null) {
			outlineWithEditorLinker.deactivate();
			getPreferenceStoreAccess().getPreferenceStore().removePropertyChangeListener(outlineWithEditorLinker);
		}
	}