Add workaround some completions unit tests failing with null access exceptions

src/vs/editor/contrib/suggest/completionModel.ts

@@ -222,16 +222,16 @@ export class CompletionModel {
 					// if it matches we check with the label to compute highlights
 					// and if that doesn't yield a result we have no highlights,
 					// despite having the match
-					let match = scoreFn(word, wordLow, wordPos, suggestion.filterText, suggestion._filterTextLow, 0, false);
+					let match = scoreFn(word, wordLow, wordPos, suggestion.filterText, typeof suggestion._filterTextLow === 'undefined' && suggestion.filterText ? suggestion.filterText.toLowerCase() : suggestion._filterTextLow, 0, false);
 					if (!match) {
 						continue;
 					}
 					item.score = match[0];
-					item.matches = (fuzzyScore(word, wordLow, 0, suggestion.label, suggestion._labelLow, 0, true) || anyScore(word, suggestion.label))[1];
+					item.matches = (fuzzyScore(word, wordLow, 0, suggestion.label, typeof suggestion._labelLow === 'undefined' ? suggestion.label.toLowerCase() : suggestion._labelLow, 0, true) || anyScore(word, suggestion.label))[1];
 
 				} else {
 					// by default match `word` against the `label`
-					let match = scoreFn(word, wordLow, wordPos, suggestion.label, suggestion._labelLow, 0, false);
+					let match = scoreFn(word, wordLow, wordPos, suggestion.label, typeof suggestion._labelLow === 'undefined' ? suggestion.label.toLowerCase() : suggestion._labelLow, 0, false);
 					if (match) {
 						item.score = match[0];
 						item.matches = match[1];