Dear Mr. Hennessy,
Concerning the Grace SIGSEGV when applying the clear-button
to the "Results" Window:
You asked me to do some debugging since you cannot reproduce
the problem. First of all I'm not an experienced debugger.
When I simply do a "gdb xmgrace", without having grace and
lesstif compiled with a -g option, I get (after performing
the actions that cause the SIGSEGV):
Program received signal SIGSEGV, Segmentation fault.
0x401e0688 in HandleActions () from /usr/X11R6/lib/libXt.so.6
Well, then I'm confused, because it complains about libXt.so.6,
which is from XFree86-libs version 3.3.6-11.
Does this mean that lesstif is NOT the problem, but Grace uses
wrongly a function from the X11-library?
In that case this bugreport should go to the grace-mailing list.
Or does Lesstif and the X11-library collide here?
Would it be more useful when I compile lesstif AND grace with
the -g option?
My current system is:
RedHat Linux 6.2 PC
Grace (most recent development) version 20000507
LessTif (development) version 0.90.3
XFree86 (official release) version 3.3.6-11
Please send email to me personally, since I'm not member
of the lesstif mailing list.
Regards,
Rob.
C Hennessy wrote:
>
> Hi Rob,
> Sorry but I have never used this tool so I cannot reproduce
> your problem. If you can either show me how to reproduce this or
> else give me a backtrace from gdb when the crash is experienced.
> The best solution is to give us a small code example of where the
> problem is.
>
> Rob Lahaye wrote:
> >
> > Dear Mr. Hennessy,
> >
> > Lesstif (CVS as of April 13th) shows a bug with Grace;
> > it's the text field in Window->Results.
> > The problem does not occur when Grace is compiled
> > against Motif.
> >
> > Do a non-linear-fit to a dataset and the results
> > are displayed in the Results-text-field (this will
> > pop up automatically).
> > Now one can cause Grace to crash with a "Oops! Got SIGSYS"
> > in two ways:
> >
> > 1) Clear the Results-text-field with the <clear> button
> > and perform again a fit procedure: SIGSYS crash!
> > However, this is a "slow" crash; it takes almost one
> > second on my 350MHz PC for Grace to collapse.
> > (I don't know what's going wrong, but possibly it tries
> > to write to the Results-text-field, which has been broken
> > by the <clear operation> ?!?!)
> >
> > 2) Use the mouse to mark (color reverse) the text in the
> > Results-text-field and then click <clear>. Grace will
> > immediately crash with the SIGSYS.
> >
> > Regards,
> >
> > Rob.
> > [EMAIL PROTECTED]
> > ------------------------------------------------------------------
> > Grace-5.1.0
> >
> > GUI toolkit: @(#)GNU/LessTif Version 1.2 Release 0.89.9 cvs
> > T1lib: 1.0.1-grace
> > FFT: built-in
> > NetCDF support: off
> > Built: Fri Apr 7 12:26:23 2000 on Linux 2.2.15-2.5.0 i686
> > Compiler flags: gcc -O2 -mcpu=pentiumpro -fno-common -Wall -pedantic
> > -Wpointer-arith -Wnested-externs -Wno-implicit-int -I.. -I.
> > -I../T1lib/t1lib -I/usr/local/lesstif/include -I/usr/X11R6/include
> > -L/usr/local/lesstif/lib -L/usr/X11R6/lib -lXbae -lXm -lXpm -lXp -lXmu
> > -lXt -lXext -lX11 -lSM -lICE ../cephes/libcephes.a ../T1lib/libt1.a
> > -ltiff -ljpeg -lpng -lz -lm -ldl
> >
> > Registered devices:
> > X11 PostScript EPS MIF SVG PNM JPEG PNG Metafile
