Crash when making changes to some existing score.

I know the title is not good, but for now I can't come up with a better one.

Follow up of #108136: changing instruments from Mixer and close without saving cause crash

Attached is a stripped down and anonymized version of one of my scores.
It might well be possible to strip it down even further

1. open in master (self built 3c7a69d, Windows 7)
2. do any modification to it, e.g. delete the title
3. close it, with save or without, doesn't seem to make a difference (other than the change does get saved or not)

-> Crash (and apparently after successfully have saved it)

Stack trace:
1 ?? 0x50daa000
2 Ms::Segment::~Segment segment.cpp 190 0x793b0d
3 Ms::Segment::~Segment segment.cpp 194 0x793be5
4 Ms::Measure::~Measure measure.cpp 189 0x798723
5 Ms::Measure::~Measure measure.cpp 193 0x798789
6 Ms::Score::~Score score.cpp 328 0x73a8d8
7 Ms::MasterScore::~MasterScore score.cpp 4056 0x749fd4
8 Ms::MasterScore::~MasterScore score.cpp 4064 0x74a009
9 Ms::MuseScore::removeTab musescore.cpp 1943 0x488090
10 Ms::MuseScore::qt_static_metacall moc_musescore.cpp 798 0x6880d7
11 ZN11QMetaObject8activateEP7QObjectiiPPv 0x68a07a62
12 Ms::ScoreTab::tabCloseRequested moc_scoretab.cpp 186 0x68e4db
13 Ms::ScoreTab::qt_static_metacall moc_scoretab.cpp 94 0x68e1d7
14 ZN11QMetaObject8activateEP7QObjectiiPPv 0x68a07a62
15 ZNK7QTabBar18minimumTabSizeHintEi 0x196fcf73
16 ?? 0x1
17 ?? 0x28c8c8