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
break;
					
					
					
					default:
						if (e.keyCode != SWT.CAPS_LOCK && e.keyCode != SWT.MOD1
								&& e.keyCode != SWT.MOD2
								&& e.keyCode != SWT.MOD3
								&& e.keyCode != SWT.MOD4) {
							close();
						}
						return;
					}
					
					
					if (newSelection >= 0) {
						selectProposal(newSelection);
					}
					return;
				}
				
				
				
				switch (key) {
				case SWT.ESC:
					e.doit = false;
					close();
					break;
				case SWT.LF:
				case SWT.CR: