fix #279761: add a missing list emptiness check

musescore · Dec 17, 2018 · 7c85526 · 7c85526
1 parent 64e1265
commit 7c85526
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/libmscore/range.cpp b/libmscore/range.cpp
@@ -172,7 +172,7 @@ void TrackList::append(Element* e)
                                           break;
                                           }
                                    }
-                              if (akkumulateChord && back()->isChord()) {
+                              if (akkumulateChord && !empty() && back()->isChord()) {
                                     Chord* bc   = toChord(back());
                                     Fraction du = bc->duration();
                                     du += bc->duration();