Re: Octave segmentation fault when plotting graph

[Marco Atzeri <marco dot atzeri at gmail dot com>]

On 12/04/2016 13:53, Stephen Wilkinson wrote:
> Tatsuro: I tried to roll back to earlier version of Cygwin (all packages) but that broke several other things.
>
> Marco: I confirm that was broken for 32-bit. I've just installed Cygwin 64-bit and Octave works as expected. I got crashes with fltk and qt graphic toolkits, but I admit I didn't try gnuplot. All was working fine until I updated -- I can't remember what version of Octave I was running but 4.0.0 sounds about right.
>
> Regards,
> Steve

I guess Tatsuro was thinking to revert only cygwin package to 2.4.1.
I just tried and it makes no difference.


the segfault seems in the X libraries

#1  0x43934357 in gallium_dri!__driDriverGetExtensions_swrast ()
   from E:/cygwin/lib/dri/swrast_dri.so
#2  0x439346c6 in gallium_dri!__driDriverGetExtensions_swrast ()
   from E:/cygwin/lib/dri/swrast_dri.so
#3  0x4385314d in gallium_dri!__driDriverGetExtensions_swrast ()
   from E:/cygwin/lib/dri/swrast_dri.so
#4  0x4384bd7d in gallium_dri!__driDriverGetExtensions_swrast ()
   from E:/cygwin/lib/dri/swrast_dri.so
#5  0x4384c247 in gallium_dri!__driDriverGetExtensions_swrast ()
   from E:/cygwin/lib/dri/swrast_dri.so
#6  0x43967ca5 in gallium_dri!__driDriverGetExtensions_swrast ()
   from E:/cygwin/lib/dri/swrast_dri.so
#7  0x436978c6 in gallium_dri!__driDriverGetExtensions_swrast ()
   from E:/cygwin/lib/dri/swrast_dri.so
#8  0x4366a3a2 in gallium_dri!__driDriverGetExtensions_swrast ()
   from E:/cygwin/lib/dri/swrast_dri.so
#9  0x43651882 in gallium_dri!__driDriverGetExtensions_swrast ()
   from E:/cygwin/lib/dri/swrast_dri.so
#10 0x43666f95 in gallium_dri!__driDriverGetExtensions_swrast ()
   from E:/cygwin/lib/dri/swrast_dri.so
#11 0x43563674 in gallium_dri!__driDriverGetExtensions_swrast ()
   from E:/cygwin/lib/dri/swrast_dri.so
#12 0x43563ce9 in gallium_dri!__driDriverGetExtensions_swrast ()
   from E:/cygwin/lib/dri/swrast_dri.so
#13 0x4ac0a82c in opengl_renderer::set_polygon_offset (this=0x806b1030,
    on=false, offset=0)
    at /usr/src/debug/octave-4.0.1-1/libinterp/corefcn/gl-render.cc:2916
#14 0x4ac0c8e6 in opengl_renderer::draw_axes_planes (
    this=this@entry=0x806b1030, props=...)
    at /usr/src/debug/octave-4.0.1-1/libinterp/corefcn/gl-render.cc:904
#15 0x4ac11110 in opengl_renderer::draw_axes (this=0x806b1030, props=...)
    at /usr/src/debug/octave-4.0.1-1/libinterp/corefcn/gl-render.cc:1474
#16 0x4ac0ae07 in opengl_renderer::draw (this=0x806b1030, go=...,
    toplevel=false)
    at /usr/src/debug/octave-4.0.1-1/libinterp/corefcn/gl-render.cc:589
#17 0x4afc355b in opengl_renderer::draw (this=this@entry=0x806b1030,
    hlist=..., toplevel=toplevel@entry=false)
    at /usr/src/debug/octave-4.0.1-1/libinterp/corefcn/gl-render.h:81
#18 0x4ac0cd5d in opengl_renderer::draw_figure (this=0x806b1030, props=...)
    at /usr/src/debug/octave-4.0.1-1/libinterp/corefcn/gl-render.cc:615
#19 0x4ac0ae07 in opengl_renderer::draw (this=0x806b1030, go=...,


It will take a while to find the root cause...

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