[GRASS-user] v.net.iso - segmentation fault error

Fri Oct 28 01:11:00 PDT 2016

O Xov, 27-10-2016 ás 14:56 +0200, Markus Metz escribiu:
> On Thu, Oct 27, 2016 at 11:16 AM, Eduardo Corbelle Rico
> <eduardo.corbelle at gmx.net> wrote:
> > 
> > O Mér, 26-10-2016 ás 23:18 +0200, Markus Metz escribiu:
> > > On Thu, Oct 13, 2016 at 9:55 AM, Eduardo Corbelle Rico
> > > <eduardo.corbelle at gmx.net> wrote:
> > > > 
> > > > Dear all,
> > > > 
> > > > I am unable to use v.net.iso because of a "segmentation fault"
> > > > error. I
> > > >  have a script that used to work correctly in GRASS 6.4 (32
> > > > bit)
> > > > but
> > > > produces this error after I switched to GRASS 7.0.4 (64 bit).
> > > > 
> > > > If I try to follow both examples shown in https://grass.osgeo.o
> > > > rg/g
> > > > rass
> > > > 70/manuals/v.net.iso.html (using the Spearfish dataset for
> > > > GRASS 7)
> > > > the
> > > > same error appears:
> > > > 
> > > > > Building graph...
> > > > > Registering arcs...
> > > > > Segmentation fault
> > > 
> > > The segmentation fault must happen in the vector libraries. I
> > > tested
> > > on Linux and can not reproduce the segmentation fault. Valgrind
> > > also
> > > does not show anything that could cause a segmentation fault. Can
> > > you
> > > provide a gdb backtrace?
> > > 
> > > Markus M
> > 
> > Thank you Markus,
> > 
> > My system is debian Stretch, and the following lines describe my
> > attempt at generating a gdb backtrace. Please let me know if I
> > should
> > do otherwise.
> 
> So far so good. The module crashes in a library function that comes
> from libavl without modifications, but I can still not see why it
> could cause a segmentation fault. Can you recompile with the compiler
> debugging option -g? gdb will then be able to provide more
> information:
> 
> make distclean
> CFLAGS="-g" ./configure <configure options>
> make
> 
> optionally make install
> 
> Then start GRASS and use gdb for v.net.iso as before.
> 
> Markus M

Thank you, I'll try. Grass was installed in my system using pre-
compiled packages (via apt-get)... Forgive me if this is a silly
question: from which folder am I supposed to execute the commands? (or
should I download the source files and start all over?)

> 
> > 
> > 
> > GRASS 7.0.5 (spearfish60_grass7):~ > gdb `which v.net.iso`
> > GNU gdb (Debian 7.11.1-2) 7.11.1
> > Copyright (C) 2016 Free Software Foundation, Inc.
> > License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses
> > /gpl
> > .html>
> > This is free software: you are free to change and redistribute it.
> > There is NO WARRANTY, to the extent permitted by law.  Type "show
> > copying"
> > and "show warranty" for details.
> > This GDB was configured as "x86_64-linux-gnu".
> > Type "show configuration" for configuration details.
> > For bug reporting instructions, please see:
> > <http://www.gnu.org/software/gdb/bugs/>.
> > Find the GDB manual and other documentation resources online at:
> > <http://www.gnu.org/software/gdb/documentation/>.
> > For help, type "help".
> > Type "apropos word" to search for commands related to "word"...
> > Reading symbols from /usr/lib/grass70/bin/v.net.iso...(no debugging
> > symbols found)...done.
> > 
> > 
> > (gdb) run input=myroads_net output=myroads_net_iso center_cats=1-
> > 100000
> > costs=1000,2000,5000
> > Starting program: /usr/lib/grass70/bin/v.net.iso input=myroads_net
> > output=myroads_net_iso center_cats=1-100000 costs=1000,2000,5000
> > [Thread debugging using libthread_db enabled]
> > Using host libthread_db library "/lib/x86_64-linux-
> > gnu/libthread_db.so.1".
> > Building graph...
> > Registering arcs...
> > 
> > Program received signal SIGSEGV, Segmentation fault.
> > 0x00007ffff6c64708 in tavl_probe ()
> >    from /usr/lib/grass70/lib/libgrass_dgl.7.0.5.so
> > 
> > 
> > (gdb) bt full
> > #0  0x00007ffff6c64708 in tavl_probe ()
> >    from /usr/lib/grass70/lib/libgrass_dgl.7.0.5.so
> > No symbol table info available.
> > #1  0x00007ffff6c65717 in dglTreeNodeAdd ()
> >    from /usr/lib/grass70/lib/libgrass_dgl.7.0.5.so
> > No symbol table info available.
> > #2  0x00007ffff6c5aa0c in dgl_add_edge_V1 ()
> >    from /usr/lib/grass70/lib/libgrass_dgl.7.0.5.so
> > No symbol table info available.
> > #3  0x00007ffff6c58a62 in dglAddEdge ()
> >    from /usr/lib/grass70/lib/libgrass_dgl.7.0.5.so
> > No symbol table info available.
> > #4  0x00007ffff7ba1d69 in Vect_net_build_graph ()
> >    from /usr/lib/grass70/lib/libgrass_vector.7.0.5.so
> > No symbol table info available.
> > #5  0x0000000000401aa9 in main ()
> > No symbol table info available.
> > 
> > 
> > (gdb) l
> > 1       ../sysdeps/x86_64/dl-procinfo.c: Non hai tal ficheiro ou
> > directorio.
> > 
> > 
> > 
> > > 
> > > > 
> > > > What I am missing?
> > > > 
> > > > Thanks in advance.
> > > > 
> > > > Greetings.
> > > > 
> > > > Eduardo Corbelle
> > > > 
> > > > 
> > > > 
> > > > --
> > > > Dr. Eduardo Corbelle Rico
> > > > 
> > > > Land laboratory (LaboraTe)
> > > > Department of Agricultural and Forest Engineering
> > > > Universidade de Santiago de Compostela
> > > > 
> > > > e-mail: eduardo.corbelle at usc.es
> > > > Tel:  +34 982 823 324
> > > > Fax:  +34 982 285 926
> > > > Web: http://laborate.usc.es
> > > >      http://masterterra.usc.es
> > > >      http://github.com/eduardocorbelle
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