Bug 27114 something leaks StyleRanges and Lines
180K of StyleReanges and 47K of Lines after: -open editor -close editor seems like StyleRange objects are never freed
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javaeditor/JavaEditor.java
IPreferenceStore preferenceStore= getPreferenceStore();
			preferenceStore.addPropertyChangeListener(this);			
		}
		
		public void uninstall() {
			ISourceViewer sourceViewer= getSourceViewer();
			if (sourceViewer == null)
				return;
				
			StyledText text= sourceViewer.getTextWidget();
			if (text == null || text.isDisposed())
				return;
			sourceViewer.removeTextInputListener(this);
			IDocument document= sourceViewer.getDocument();
			if (document != null)
				document.removeDocumentListener(this);
				
			text.removeKeyListener(this);
			text.removeMouseListener(this);
			text.removeMouseMoveListener(this);
			text.removeFocusListener(this);
			text.removePaintListener(this);
			
			IPreferenceStore preferenceStore= getPreferenceStore();
			preferenceStore.removePropertyChangeListener(this);
			
			if (fColor != null) {
				fColor.dispose();
				fColor= null;
			}