Program received signal SIGSEGV, Segmentation fault.
0x006c9067 in Ms::SlurSegment::gripAnchor (this=0x2274f5f0, grip=5)
    at C:\Git_packages\MuseScore\libmscore\slur.cpp:247
247           QPointF sp(system()->pagePos());

(gdb) bt
#0  0x006c9067 in Ms::SlurSegment::gripAnchor (this=0x2274f5f0, grip=5)
    at C:\Git_packages\MuseScore\libmscore\slur.cpp:247
#1  0x004220c1 in Ms::ScoreView::updateGrips (this=0x220dede8) at C:\Git_packages\MuseScore\mscore\scoreview.cpp:1204
#2  0x0057cf0f in Ms::ScoreView::startEdit (this=0x220dede8) at C:\Git_packages\MuseScore\mscore\editelement.cpp:73
#3  0x0057ce2a in Ms::ScoreView::startEdit (this=0x220dede8, element=0x2274f5f0, startGrip=5)
    at C:\Git_packages\MuseScore\mscore\editelement.cpp:53
#4  0x006c8ff9 in Ms::SlurSegment::changeAnchor (this=0x222a9d60, viewer=0x220dee00, curGrip=5, element=0x22241fd8)
    at C:\Git_packages\MuseScore\libmscore\slur.cpp:233
#5  0x006c9850 in Ms::SlurSegment::editDrag (this=0x222a9d60, ed=...)
    at C:\Git_packages\MuseScore\libmscore\slur.cpp:354
#6  0x0057d72d in Ms::ScoreView::doDragEdit (this=0x220dede8, ev=0x227d7f30)
    at C:\Git_packages\MuseScore\mscore\editelement.cpp:183
#7  0x009ea473 in Ms::DragEditTransition::onTransition (this=0x21b46868, e=0x257dd190)
    at C:\Git_packages\MuseScore\mscore\scoreview.cpp:551
#8  0x68a3b0f7 in ZN20QStateMachinePrivate24executeTransitionContentEP6QEventRK5QListIP19QAbstractTransitionE ()
   from C:\Git_packages\MuseScore\win32install\bin\Qt5Core.dll
#9  0x00000011 in ?? ()
#10 0x00000000 in ?? ()

(gdb) print this
$1 = (const Ms::SlurSegment * const) 0x2274f5f0

(gdb) print this->system()
$2 = (Ms::System *) 0x0