From kde-edu-devel  Wed Jan 08 21:40:21 2014
From: Alexander Semke <Alexander.Semke () web ! de>
Date: Wed, 08 Jan 2014 21:40:21 +0000
To: kde-edu-devel
Subject: Re: LabPlot2 for kde-edu?
Message-Id: <33081362.JWtPQteGNl () linux-7xsw ! site>
X-MARC-Message: https://marc.info/?l=kde-edu-devel&m=138921728506995

Hi,

> What version of libspectre/ghostscript are you using?
libspectre - v0.2.7
ghostcript - v9.07

> There used to be bug
> https://bugs.kde.org/show_bug.cgi?id=319053,
Yes, the attached screenshot in this bug ticket looks exactly like the image I 
get on my system.

> can you try setting LANG=C as suggested in one of the comments there?
After setting LANG=C cantor hangs with "Initializing session". If I hit the 
abort button, I end up with no session window.

> If that doesn't help, can you send
> me the screenshot and the debugging output cantor gives you to my email
> adress?
Executing 5+5; also leads to a crash. I can see \begin{eqnarray*}... before 
the crash. Here the relevant frames for this case (don't have the debug 
symbols installed):
#6  mask_alpha_converter (dest=dest@entry=0x8510368, src=0x84ec408) at 
image/qimage.cpp:2659
#7  0xb60c07d2 in QImage::convertToFormat (this=0xbff95118, 
format=QImage::Format_ARGB32, flags=...) at image/qimage.cpp:3902
#8  0xb1238927 in ?? () from /usr/lib/kde4/libcantorpart.so
#9  0xb1238b58 in ?? () from /usr/lib/kde4/libcantorpart.so
#10 0xb1238cd2 in ?? () from /usr/lib/kde4/libcantorpart.so
#11 0xb12350c5 in ?? () from /usr/lib/kde4/libcantorpart.so
#12 0xb1235513 in ?? () from /usr/lib/kde4/libcantorpart.so
#13 0xb1220f42 in ?? () from /usr/lib/kde4/libcantorpart.so
#14 0xb11fe970 in ?? () from /usr/lib/kde4/libcantorpart.so
#15 0xb6b00c55 in QMetaObject::activate (sender=0x84f9038, m=0xb71ecca8 
<Cantor::Expression::staticMetaObject>, local_signal_index=1, argv=0x0) at 
kernel/qobject.cpp:3556
#16 0xb71d0855 in Cantor::Expression::gotResult() () from 
/usr/lib/libcantorlibs.so.1
#17 0xb71d0cae in Cantor::Expression::setResult(Cantor::Result*) () from 
/usr/lib/libcantorlibs.so.1
#18 0xb71d103b in Cantor::Expression::latexRendered() () from 
/usr/lib/libcantorlibs.so.1
#19 0xb71d125c in ?? () from /usr/lib/libcantorlibs.so.1


For the case with plot2d the relevant part is
 
#6  mask_alpha_converter (dest=dest@entry=0x944ad68, src=0x9455bd8) at 
image/qimage.cpp:2659
#7  0xb616b7d2 in QImage::convertToFormat (this=0xbfbd3d2c, 
format=QImage::Format_ARGB32, flags=...) at image/qimage.cpp:3902
#8  0xb12e4927 in ?? () from /usr/lib/kde4/libcantorpart.so
#9  0xb12cb1ea in ?? () from /usr/lib/kde4/libcantorpart.so
#10 0xb12e2478 in ?? () from /usr/lib/kde4/libcantorpart.so
#11 0xb12ccf42 in ?? () from /usr/lib/kde4/libcantorpart.so
#12 0xb12aa970 in ?? () from /usr/lib/kde4/libcantorpart.so
#13 0xb6babc55 in QMetaObject::activate (sender=0x9210f78, m=0xb7297ca8 
<Cantor::Expression::staticMetaObject>, local_signal_index=1, argv=0x0) at 
kernel/qobject.cpp:3556
#14 0xb727b855 in Cantor::Expression::gotResult() () from 
/usr/lib/libcantorlibs.so.1
#15 0xb727bcae in Cantor::Expression::setResult(Cantor::Result*) () from 
/usr/lib/libcantorlibs.so.1
#16 0xb1b28d77 in ?? () from /usr/lib/kde4/cantor_maximabackend.so



Alexander
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