Bug 125955 [Field Assist] - StringIndexOutOfBoundsException when backspacing out of a filter
bundles/org.eclipse.jface/src/org/eclipse/jface/fieldassist/ContentProposalAdapter.java
public void widgetDisposed(DisposeEvent event) {
					popup = null;
				}
			});
		}
	}
	/*
	 * A content proposal has been accepted. Update the control contents
	 * accordingly and notify any listeners.
	 * 
	 * @param proposal the accepted proposal
	 */
	private void proposalAccepted(IContentProposal proposal) {
		switch (acceptance) {
		case (PROPOSAL_REPLACE):
			setControlContent(proposal.getContent(), proposal
					.getCursorPosition());
			break;
		case (PROPOSAL_INSERT):
			insertControlContent(proposal.getContent(), proposal
					.getCursorPosition());
			break;
		default:
			
			
			break;
		}
		
		final Object[] listenerArray = proposalListeners.getListeners();
		for (int i = 0; i < listenerArray.length; i++)