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
if (infoPopup != null) {
						infoPopup.close();
					}
				}
			}
		}
		/*
		 * Get the string for the specified proposal. Always return a String of
		 * some kind.
		 */
		private String getString(IContentProposal proposal) {
			if (proposal == null) {
				return EMPTY;
			}
			if (labelProvider == null) {
				return proposal.getLabel() == null ? proposal.getContent()
						: proposal.getLabel();
			}
			return labelProvider.getText(proposal);
		}
		/*
		 * Get the image for the specified proposal. If there is no image
		 * available, return null.
		 */
		private Image getImage(IContentProposal proposal) {
			if (proposal == null || labelProvider == null) {
				return null;
			}
			return labelProvider.getImage(proposal);