Bug 427239

Summary:	Labplot crashes when trying to insert a xy-curve from a mathematical equation
Product:	[Applications] LabPlot2	Reporter:	Orestes Mas <orestes>
Component:	frontend	Assignee:	Stefan Gerlach <stefan.gerlach>
Status:	RESOLVED FIXED
Severity:	crash	CC:	stefan.gerlach
Priority:	NOR
Version First Reported In:	latest
Target Milestone:	---
Platform:	Debian stable
OS:	Linux
Latest Commit:	https://invent.kde.org/education/labplot/commit/884dbe91f787e61d6d9c5e7467c8bbc4f42565a5	Version Fixed/Implemented In:	2.8.1
Sentry Crash Report:
Attachments:	Video showing the reported. labplot crash

Description Orestes Mas 2020-10-02 09:53:40 UTC

Created attachment 132066 [details]
Video showing the reported. labplot crash

>>>>> SUMMARY

See bug title


>>>>> STEPS TO REPRODUCE
1. Start Labplot
2. Create new empty project
3. Add a worksheet
4. Add an xy-plot (Box plot, four axes, for instance)
5. Try to add an xy-curve from a mathematical equation. Labplot crashes.
   (see attached video)

>>>>> SOFTWARE/OS VERSIONS
Linux/KDE Plasma: 
Operating System: Debian GNU/Linux 10
KDE Plasma Version: 5.14.5
Qt Version: 5.11.3
KDE Frameworks Version: 5.54.0
Kernel Version: 4.19.0-10-amd64
OS Type: 64-bit
Processors: 8 × Intel® Core™ i7-7700K CPU @ 4.20GHz
Memory: 31.4 GiB of RAM

Labplot:
Debug build of master branch commit 57e1522a2573f531db988d5fcfee5671b3f38693
Oct 2 2020, 11:12:08
System: Debian GNU/Linux 10 (buster)
Locale: Catalan,Spain (Decimal point ',', Group separator '.')
Number settings: Decimal point ',', Group separator '.', Exponential 'e', Zero digit '0', Percent '%', Positive/Negative sign '+'/'-' (Updated on restart)
Architecture: x86_64-little_endian-lp64
Kernel: linux 4.19.0-10-amd64
C++ Compiler: GNU 8.3.0
C++ Compiler Flags: -std=c++0x -fno-operator-names -fno-exceptions -Wall -Wextra -Wcast-align -Wchar-subscripts -Wformat-security -Wno-long-long -Wpointer-arith -Wundef -Wnon-virtual-dtor -Woverloaded-virtual -Werror=return-type -Wvla -Wdate-time -Wall -Wextra -Wundef -Wpointer-arith -Wunreachable-code -Wunused -Wdeprecated-declarations -fno-omit-frame-pointer -fstack-protector -fexceptions -O2 -Wcast-align -Wswitch-enum -fvisibility=default


>>>>> ADDITIONAL INFORMATION
Seems a regression introduced after latest work on xy-curve. Perhaps related to https://bugs.kde.org/show_bug.cgi?id=426442 ??

>>>>> STACK TRACE (gdb)
Thread 1 "labplot2" received signal SIGSEGV, Segmentation fault.
__GI_____strtod_l_internal (nptr=0x5555588ab720 "0\n", endptr=0x7fffffffab38, group=0, loc=0x0) at strtod_l.c:561
561     strtod_l.c: El fitxer o directori no existeix.
(gdb) bt
#0  __GI_____strtod_l_internal (nptr=0x5555588ab720 "0\n", endptr=0x7fffffffab38, group=0, loc=0x0) at strtod_l.c:561
#1  0x00005555558eacae in yylex ()
#2  0x00005555558eb40a in yyparse ()
#3  0x00005555558eb9f3 in parse ()
#4  0x0000555555b1df04 in ExpressionParser::isValid(QString const&, QStringList const&) ()
#5  0x0000555555ab0444 in ExpressionTextEdit::validateExpression(bool) ()
#6  0x00007ffff5af1933 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007ffff6803d2d in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#8  0x00007ffff5af17f6 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007ffff681e543 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#10 0x00007ffff67ffb21 in QTextEdit::setPlainText(QString const&) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#11 0x0000555555a0e90d in XYEquationCurveDock::initGeneralTab() ()
#12 0x0000555555a0f33c in XYEquationCurveDock::setCurves(QList<XYCurve*>) ()
#13 0x000055555592a89e in GuiObserver::selectedAspectsChanged(QList<AbstractAspect*>&) const ()
#14 0x00007ffff5af1933 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#15 0x00005555558eeb19 in ProjectExplorer::selectedAspectsChanged(QList<AbstractAspect*>&) ()
#16 0x00005555558d74aa in ProjectExplorer::selectionChanged(QItemSelection const&, QItemSelection const&) ()
#17 0x00007ffff5af1933 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#18 0x00007ffff5a89708 in QItemSelectionModel::selectionChanged(QItemSelection const&, QItemSelection const&) ()
   from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#19 0x00007ffff5a91f65 in QItemSelectionModel::emitSelectionChanged(QItemSelection const&, QItemSelection const&) ()
   from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#20 0x00007ffff5a9261b in QItemSelectionModel::select(QItemSelection const&, QFlags<QItemSelectionModel::SelectionFlag>) ()
   from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#21 0x00007ffff5a8c4ac in QItemSelectionModel::select(QModelIndex const&, QFlags<QItemSelectionModel::SelectionFlag>) ()
   from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#22 0x00007ffff5a89adc in QItemSelectionModel::setCurrentIndex(QModelIndex const&, QFlags<QItemSelectionModel::SelectionFlag>) ()
   from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#23 0x00007ffff68916cd in QAbstractItemView::setCurrentIndex(QModelIndex const&) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#24 0x00005555558d2ea2 in ProjectExplorer::aspectAdded(AbstractAspect const*) ()
#25 0x00007ffff5af1933 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#26 0x00005555558f0511 in AbstractAspect::aspectAdded(AbstractAspect const*) ()
#27 0x00007ffff5af1933 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#28 0x00005555558f0511 in AbstractAspect::aspectAdded(AbstractAspect const*) ()
#29 0x00007ffff5af1933 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#30 0x00005555558f0511 in AbstractAspect::aspectAdded(AbstractAspect const*) ()
#31 0x00007ffff69ace93 in QUndoStack::push(QUndoCommand*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#32 0x00005555556cfc5e in AbstractAspect::exec(QUndoCommand*) ()
#33 0x00005555556d2025 in AbstractAspect::addChild(AbstractAspect*) ()
#34 0x00005555557a9f5c in CartesianPlot::addEquationCurve() ()
#35 0x00007ffff5af1933 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#36 0x00007ffff6643f02 in QAction::triggered(bool) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#37 0x00007ffff6646520 in QAction::activate(QAction::ActionEvent) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#38 0x00007ffff67b6a4c in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#39 0x00007ffff67bdf70 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#40 0x00007ffff67beedb in QMenu::mouseReleaseEvent(QMouseEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#41 0x00007ffff66884d8 in QWidget::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#42 0x00007ffff67c136b in QMenu::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
--Type <RET> for more, q to quit, c to continue without paging--
#43 0x00007ffff664a4c1 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#44 0x00007ffff6651bb8 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#45 0x00007ffff5ac8489 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#46 0x00007ffff6650ee9 in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&, bool) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#47 0x00007ffff66a3393 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#48 0x00007ffff66a5b5e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#49 0x00007ffff664a4c1 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#50 0x00007ffff6651970 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#51 0x00007ffff5ac8489 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#52 0x00007ffff5e73ff3 in QGuiApplicationPrivate::processMouseEvent(QWindowSystemInterfacePrivate::MouseEvent*) ()
   from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#53 0x00007ffff5e75e75 in QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*) ()
   from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#54 0x00007ffff5e5006b in QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
   from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#55 0x00007ffff013840b in ?? () from /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#56 0x00007ffff5ac715b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#57 0x00007ffff67bbc1d in QMenu::exec(QPoint const&, QAction*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#58 0x00005555558d7006 in ProjectExplorer::contextMenuEvent(QContextMenuEvent*) ()
#59 0x00007ffff66884d8 in QWidget::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#60 0x00007ffff664a4c1 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#61 0x00007ffff6651e1e in QApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#62 0x00007ffff5ac8489 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#63 0x00007ffff66a37c1 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#64 0x00007ffff66a5b5e in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#65 0x00007ffff664a4c1 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#66 0x00007ffff6651970 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#67 0x00007ffff5ac8489 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#68 0x00007ffff5e73ff3 in QGuiApplicationPrivate::processMouseEvent(QWindowSystemInterfacePrivate::MouseEvent*) ()
   from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#69 0x00007ffff5e75e75 in QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*) ()
   from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#70 0x00007ffff5e5006b in QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
   from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#71 0x00007ffff013840b in ?? () from /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#72 0x00007ffff5ac715b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#73 0x00007ffff5acf132 in QCoreApplication::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#74 0x000055555567fb50 in main ()

Comment 1 Stefan Gerlach 2020-10-02 10:07:44 UTC

Not reproducable on OpenSUSE 15.1.

Comment 2 Orestes Mas 2020-10-02 10:24:13 UTC

(In reply to Stefan Gerlach from comment #1)
> Not reproducable on OpenSUSE 15.1.

Bad news, then.

I just tried it on my office desktop computer (Kubuntu). Same crash. Maybe it's Debian-related?

Operating System: Kubuntu 20.04
KDE Plasma Version: 5.18.5
KDE Frameworks Version: 5.68.0
Qt Version: 5.12.8
Kernel Version: 5.4.0-48-generic
OS Type: 64-bit
Processors: 8 × Intel® Core™ i7-4790 CPU @ 3.60GHz
Memory: 7,7 GiB

Comment 3 Stefan Gerlach 2020-10-02 14:59:58 UTC

Git commit 884dbe91f787e61d6d9c5e7467c8bbc4f42565a5 by Stefan Gerlach.
Committed on 02/10/2020 at 14:57.
Pushed by sgerlach into branch 'master'.

[parser] Fix crash in parser when used locale is not installed
FIXED-IN: 2.8.1

M  +17   -3    src/backend/gsl/parser.y

https://invent.kde.org/education/labplot/commit/884dbe91f787e61d6d9c5e7467c8bbc4f42565a5

Comment 4 Orestes Mas 2020-10-02 17:46:51 UTC

(In reply to Stefan Gerlach from comment #3)
> Git commit 884dbe91f787e61d6d9c5e7467c8bbc4f42565a5 by Stefan Gerlach.
> Committed on 02/10/2020 at 14:57.
> Pushed by sgerlach into branch 'master'.
> 
> [parser] Fix crash in parser when used locale is not installed
> FIXED-IN: 2.8.1
> 
> M  +17   -3    src/backend/gsl/parser.y
> 
> https://invent.kde.org/education/labplot/commit/
> 884dbe91f787e61d6d9c5e7467c8bbc4f42565a5

Works for me.

The fastest fix in the world: you guys are amazing :-)