Bug 262022 [FieldAssist] ContentProposalAdapter.recomputeProposals might throw a NPE
When a control using content proposal gets disposed during usage the recomputeProposals() method might throw a NPE. This is caused by getting "allProposals" using a call to getProposals() which is allowed to return null. When using allProposals.length this will crash. I'm not sure if the simple solution if ((allProposals == null) || (allProposals.length == 0) { proposals = new IContentProposal[0]; close(); } else { // cont. will work or if the popup will have problems with a disposed control.
bundles/org.eclipse.jface/src/org/eclipse/jface/fieldassist/ContentProposalAdapter.java
ArrayList list = new ArrayList();
			for (int i = 0; i < proposals.length; i++) {
				String string = getString(proposals[i]);
				if (string.length() >= filterString.length()
						&& string.substring(0, filterString.length())
								.equalsIgnoreCase(filterString)) {
					list.add(proposals[i]);
				}
			}
			return (IContentProposal[]) list.toArray(new IContentProposal[list
					.size()]);
		}
		Listener getTargetControlListener() {
			if (targetControlListener == null) {
				targetControlListener = new TargetControlListener();
			}
			return targetControlListener;
		}
	}
	/**
	 * Flag that controls the printing of debug info.
	 */
	public static final boolean DEBUG = false;
	/**
	 * Indicates that a chosen proposal should be inserted into the field.
	 */
	public static final int PROPOSAL_INSERT = 1;
	/**