Position Tween Crashing Issue #8

[manuel465]

This error is related to the Position Tween and Undo (Ctrl-Z) features

To reproduce this error follow these steps:

• Create a Position Tween
• Define the path of the Tween, then modify any of the path nodes
• Press Ctrl + Z until the object of the Tween be removed
• Press Ctrl + Y until you recover the Tween. The program will crash

Bug trace:

560d23a29cb5 in crashTrapper(int) (sig=6) at tupcrashhandler.cpp:324

#2 0x00007ffbbb115f20 in () at /lib/x86_64-linux-gnu/libc.so.6

#3 0x00007ffbbb115e97 in __GI_raise (sig=sig@entry=6)
at ../sysdeps/unix/sysv/linux/raise.c:51

#4 0x00007ffbbb117801 in __GI_abort () at abort.c:79

#5
0x00007ffbbbd10bfc in qErrnoWarning(char const*, ...) () at /home/xtingray/Qt5.13.1/5.13.1/gcc_64/lib/libQt5Core.so.5

#6 0x00007ffbbbd102fb in qt_assert_x(char const*, char const*, char const*, int) () at /home/xtingray /Qt5.13.1/5.13.1/gcc_64/lib/libQt5Core.so.5

#7 0x00007ffbbe9bc7f2 in QList::last() (this=0x560d25509c88) at /home/xtingray/Qt5.13.1/5.13.1/gcc_64/include/QtCore/qlist.h:366

#8 0x00007ffb9ebc342a in StepsViewer::redoSegment (QPainterPath) (this=0x560d25509c50, painterPath=...) at stepsviewer.cpp:679

#9 0x00007ffb9b075bae in Settings:: redoSegment(QPainterPath) (this=0x560d25505c40, path=...) at settings.cpp:351

#10 0x00007ffb9b073066 in Configurator::redoSegment(QPainterPath) (this=0x560d251eded0, path=...) at configurator.cpp:371

#11 0x00007ffb9b06c8ee in Tweener::itemResponse(TupItemResponse const*) (this=0x560d24f17500, response=0x560d25d1a3c0) at tweener.cpp:1176

#12 0x00007ffbbd986769 in TupGraphicsScene::itemResponse(TupItemResponse*) (this=0x560d27694c10, event=0x560d25d1a3c0) at tupgraphicsscene.cpp:1354

#13 0x00007ffbbf4b002a in TupPaintArea::itemResponse (TupItemResponse*) (this=0x560d2611c920, response=0x560d25d1a3c0) at tuppaintarea.cpp:631

#14 0x00007ffbbdc5c035 in TupAbstractProjectResponseHandler::handleResponse(TupProjectResponse*) (this=0x560d2611ca18, response=0x560d25d1a3c0) at tupabstractprojectresponsehandler.cpp:64

#15 0x00007ffbbf4c3994 in TupDocumentView::handleProjectResponse (TupProjectResponse*) (this=0x560d25217660, response=0x560d25d1a3c0) at tupdocumentview.cpp:1121

#1