Program crash on Debian 10

Program is blocked by warning dialogs and crashes after several warnings. The warnings always arise after attempting to draw an arc.

Warning: Ignoring XDG_SESSION_TYPE=wayland on Gnome. Use QT_QPA_PLATFORM=wayland to run on Wayland anyway.
DEBUG:Log file /home/malika/.config/ValentinaTeam/valentina-pid3568.log was locked.
DEBUG:Clearing old logs
DEBUG:Version: "0.7.0.0a"
DEBUG:Build revision: unknown
DEBUG:"Based on Qt 5.11.3 (GCC 8.3.0, 64 bit)"
DEBUG:Built on Oct 12 2018 at 09:27:00
DEBUG:Command-line arguments: ("valentina")
DEBUG:Process ID: 3568
DEBUG:Checked locale: "en_US"
DEBUG:Checked locale: "en_US"
DEBUG:Initialization property browser.
DEBUG:Initialization groups dock.
DEBUG:Can't get tag Groups.
DEBUG:Autosaving each 1 minutes.
DEBUG:Reading settings.
DEBUG:Set current name to ""
DEBUG:Enclosure URL: "https://valentinaproject.bitbucket.io/"
DEBUG:Enclosure version: "0.6.1"
DEBUG:Enclosure platform: "Q_OS_LINUX"
DEBUG:Version ' "0.6.1" ' is ignored, too old or something like that.
DEBUG:New PP.
DEBUG:Generated PP name: Pattern piece 1
DEBUG:First PP
DEBUG:PP name: Pattern piece 1
DEBUG:Redo.
DEBUG:Parsing pattern.
DEBUG:Lite parse.
DEBUG:Ignoring tag version
DEBUG:Ignoring tag unit
DEBUG:Ignoring tag description
DEBUG:Ignoring tag notes
DEBUG:Ignoring tag measurements
DEBUG:Tag draw.
DEBUG:Tag calculation.
DEBUG:Tag point.
DEBUG:Tag modeling.
DEBUG:Tag details.
DEBUG:Current pattern piece Pattern piece 1
DEBUG:Scene size updated.
DEBUG:Canceling tool.
DEBUG:Dialog closed.
DEBUG:Point label: A1
DEBUG:Redo.
DEBUG:Arrow tool.
DEBUG:Canceling tool.
DEBUG:Dialog closed.
DEBUG:Enabled arrow tool.
DEBUG:Parsing pattern.
DEBUG:Lite parse.
DEBUG:Ignoring tag version
DEBUG:Ignoring tag unit
DEBUG:Ignoring tag description
DEBUG:Ignoring tag notes
DEBUG:Ignoring tag measurements
DEBUG:Tag draw.
DEBUG:Tag calculation.
DEBUG:Tag point.
DEBUG:Tag point.
DEBUG:Tag modeling.
DEBUG:Tag details.
DEBUG:Current pattern piece Pattern piece 1
DEBUG:Scene size updated.
DEBUG:Canceling tool.
DEBUG:Dialog closed.
DEBUG:Redo.
DEBUG:Arrow tool.
DEBUG:Canceling tool.
DEBUG:Dialog closed.
DEBUG:Enabled arrow tool.
DEBUG:Parsing pattern.
DEBUG:Lite parse.
DEBUG:Ignoring tag version
DEBUG:Ignoring tag unit
DEBUG:Ignoring tag description
DEBUG:Ignoring tag notes
DEBUG:Ignoring tag measurements
DEBUG:Tag draw.
DEBUG:Tag calculation.
DEBUG:Tag point.
DEBUG:Tag point.
DEBUG:Tag arc.
DEBUG:Tag modeling.
DEBUG:Tag details.
DEBUG:Current pattern piece Pattern piece 1
DEBUG:Scene size updated.
WARNING:QPainter::begin: Paint device returned engine == 0, type: 2
QBackingStore::endPaint() called with active painter on backingstore paint device
QBackingStore::endPaint() called with active painter on backingstore paint device
QBackingStore::endPaint() called with active painter on backingstore paint device
QBackingStore::endPaint() called with active painter on backingstore paint device
WARNING:QPainter::setPen: Painter not active
WARNING:QPainter::setBrush: Painter not active
WARNING:QPainter::setRenderHint: Painter must be active to set rendering hints
WARNING:QPainter::begin: Paint device returned engine == 0, type: 2
WARNING:QPainter::setPen: Painter not active
WARNING:QPainter::setBrush: Painter not active
WARNING:QPainter::setRenderHint: Painter must be active to set rendering hints
Segmentation fault

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