Fixed bug 499980: [content assist] Potential NPE below
CompletionProposalPopup.computeProposals if no proposals possible
diff --git a/org.eclipse.jface.text/src/org/eclipse/jface/text/contentassist/CompletionProposalPopup.java b/org.eclipse.jface.text/src/org/eclipse/jface/text/contentassist/CompletionProposalPopup.java
index 1fe869a..15dd79b 100644
--- a/org.eclipse.jface.text/src/org/eclipse/jface/text/contentassist/CompletionProposalPopup.java
+++ b/org.eclipse.jface.text/src/org/eclipse/jface/text/contentassist/CompletionProposalPopup.java
@@ -564,6 +564,8 @@
 		} else {
 			proposals= fContentAssistant.computeCompletionProposals(fViewer, offset);
 		}
+		if (proposals == null)
+			return new ICompletionProposal[] {};
 		if (fSorter != null) {
 			sortProposals(proposals);
 			fIsInitialSort= true;