Add missing nil check in getCompletionItemActions (#2018)

Author: ahejlsberg

internal/ls/completions.go

@@ -794,7 +794,7 @@ func (l *LanguageService) getCompletionData(
 							kind:            getNullableSymbolOriginInfoKind(symbolOriginInfoKindSymbolMemberExport, insertQuestionDot),
 							isDefaultExport: false,
 							fileName:        fileName,
-							data: symbolOriginInfoExport{
+							data: &symbolOriginInfoExport{
 								moduleSymbol:    moduleSymbol,
 								symbolName:      firstAccessibleSymbol.Name,
 								exportName:      firstAccessibleSymbol.Name,
@@ -5342,7 +5342,7 @@ func (l *LanguageService) getCompletionItemActions(ctx context.Context, ch *chec
 	// !!! origin.isTypeOnlyAlias
 	// entryId.source == CompletionSourceObjectLiteralMemberWithComma && contextToken
 
-	if symbolDetails.origin == nil {
+	if symbolDetails.origin == nil || symbolDetails.origin.data == nil {
 		return nil
 	}