enable tst_spanners again

libmscore/score.h

@@ -382,6 +382,7 @@ class Score : public QObject, public ScoreElement {
 
       MeasureBaseList _measures;          // here are the notes
       SpannerMap _spanner;
+      // https://github.com/musescore/MuseScore/commit/c69d2a9262051be314768e24686d14913c45da47
       std::set<Spanner*> _unmanagedSpanner;
 
       UpdateState _updateState;

mtest/CMakeLists.txt

@@ -185,7 +185,7 @@ subdirs (
         libmscore/repeat
         libmscore/selectionfilter
         libmscore/selectionrangedelete
-#        libmscore/spanners            # FAIL
+        libmscore/spanners
         libmscore/split
         libmscore/splitstaff
         libmscore/timesig

mtest/libmscore/spanners/glissando-cloning04-ref.mscx

@@ -201,6 +201,10 @@
       <metaTag name="partName">Flute</metaTag>
       <PageList>
         <Page>
+          <System>
+            </System>
+          <System>
+            </System>
           </Page>
         </PageList>
       <Part>
@@ -298,7 +302,7 @@
               </Note>
             </Chord>
           </Measure>
-        <Measure number="1">
+        <Measure number="2">
           <Rest>
             <lid>7</lid>
             <durationType>measure</durationType>