--- a/AbstractSourceCodeManager.st	Mon Dec 16 11:37:59 2019 +0100
+++ b/AbstractSourceCodeManager.st	Mon Dec 16 11:38:46 2019 +0100
@@ -2897,7 +2897,7 @@
     |tagRevisionMapping tagList|
 
     tagRevisionMapping := self knownTagsAndRevisionsFor:aClass.
-    tagRevisionMapping isEmptyOrNil ifTrue:[^ #()].
+    tagRevisionMapping isEmptyOrNil ifTrue:[^ OrderedCollection new ].
     "/ ^ tagRevisionMapping keys
 
     "/ sort by revision; within same revision, sort by tag name