[GRASS-dev] [GRASS GIS] #3714: v.out.ogr: segfault with -n

[GRASS GIS]

#3714: v.out.ogr: segfault with -n
-------------------------+-------------------------
 Reporter:  neteler      |      Owner:  grass-dev@…
     Type:  defect       |     Status:  new
 Priority:  normal       |  Milestone:  7.4.4
Component:  Vector       |    Version:  unspecified
 Keywords:  v.out.ogr    |        CPU:  Unspecified
 Platform:  Unspecified  |
-------------------------+-------------------------
 At time -n crashes the command (tested also in G74 and later):

 {{{
 GRASS 7.7.svn (nc_spm_08):~ > v.out.ogr in=zipcodes_wake type=area
 out=filename.shp format=ESRI_Shapefile  -n
 Segmentation fault (core dumped)
 }}}

 Debugging with user data (from ML):

 {{{
 GRASS 7.4.3svn (test_loc_25832):~/grassdata > gdb v.out.ogr
 GNU gdb (GDB) Fedora 8.2-5.fc29
 Copyright (C) 2018 Free Software Foundation, Inc.
 ...
 Reading symbols from v.out.ogr...done.
 (gdb) r in=cur_feature type=area out=filename.shp format=ESRI_Shapefile
 output_layer=gebiet -n
 Starting program: /home/mneteler/software/grass74/dist.x86_64-pc-linux-
 gnu/bin/v.out.ogr in=cur_feature type=area out=filename.shp
 format=ESRI_Shapefile output_layer=gebiet -n
 ...
 Program received signal SIGSEGV, Segmentation fault.
 Vect_get_num_dblinks (Map=0x7fffffffbb30) at level_two.c:166
 166        return (Map->dblnk->n_fields);

 }}}

 i.e., lib/vector/Vlib/level_two.c

 Debugging in trunk with North Carolina dataset:

 {{{
 GRASS 7.7.svn (nc_spm_08):~ > gdb v.out.ogr
 GNU gdb (GDB) Fedora 8.2-5.fc29
 Copyright (C) 2018 Free Software Foundation, Inc.
 ...
 (gdb) r in=zipcodes_wake type=area out=filename.shp format=ESRI_Shapefile
 -n

 (gdb) bt
 #0  0x00007ffff7f7cdb4 in Vect_get_num_dblinks () from
 /home/mneteler/software/grass77/dist.x86_64-pc-linux-
 gnu/lib/libgrass_vector.7.7.svn.so
 #1  0x00007ffff7f72d04 in Vect_get_field_number () from
 /home/mneteler/software/grass77/dist.x86_64-pc-linux-
 gnu/lib/libgrass_vector.7.7.svn.so
 #2  0x0000000000404cfe in main ()
 }}}

-- 
Ticket URL: <https://trac.osgeo.org/grass/ticket/3714>
GRASS GIS <https://grass.osgeo.org>