[GRASS-dev] Re: [GRASS GIS] #536: memory corruption

[GRASS GIS]

#536: memory corruption
----------------------+-----------------------------------------------------
  Reporter:  martinl  |       Owner:  grass-dev at lists.osgeo.org
      Type:  defect   |      Status:  reopened                 
  Priority:  blocker  |   Milestone:  7.0.0                    
 Component:  Vector   |     Version:  svn-trunk                
Resolution:           |    Keywords:                           
  Platform:  Linux    |         Cpu:  x86-32                   
----------------------+-----------------------------------------------------
Changes (by martinl):

  * status:  closed => reopened
  * resolution:  fixed =>

Comment:

 Well, I cannot see any reason why memory was corrupted in v.info - only in
 GRASS7, but not in GRASS 6.5. When implementing very basic GEOS support in
 v.select I was facing to the similar problem.

 In the loop
 (http://trac.osgeo.org/grass/browser/grass/trunk/vector/v.select/main.c#L176)
 is initialized ifield variable. Inside of the loop everything is OK -
 ifield[0] and ifield[1] are initialized properly. After leaving the loop
 in ifield[0] occurs random value.

 More strangely when I add before line
 http://trac.osgeo.org/grass/browser/grass/trunk/vector/v.select/main.c#L37

 {{{
 struct GOption *in_opt[2];
 }}}

 memory is not corrupted at all.

 I am going to be a little bit confused ;-) Has anybody any idea what is
 happening here. Compiling GRASS7 with

 {{{
         CFLAGS="-g -Wall -Werror-implicit-function-declaration -fno-common
 -Wextra -Wunused" \
             CXXFLAGS="-g -Wall"  \
             ./configure --prefix=/usr/local \
             --with-tcltk-includes=/usr/include/tcl8.4 --with-tcltk-
 libs=/usr/lib/tcl8.4 \
             --with-postgres --with-postgres-
 includes=/usr/include/postgresql \
             --with-mysql --with-mysql-includes=/usr/include/mysql \
             --with-gdal=/usr/local/gdal-grass7/bin/gdal-config  \
             --with-proj \
             --with-motif --with-glw --with-nls --with-readline \
             --with-cxx --enable-largefile \
             --with-freetype --with-freetype-
 includes=/usr/include/freetype2 \
             --with-sqlite --with-ffmpeg --with-ffmpeg-
 includes=/usr/include/ffmpeg/ \
             --with-odbc --with-python=/usr/bin/python2.5-config --with-
 wxwidgets --with-pthread \
             --with-ffmpeg=no --with-geos
 }}}

 {{{
 gcc --version
 gcc (Debian 4.3.3-5) 4.3.3
 }}}

 Thanks in advance. Martin

-- 
Ticket URL: <http://trac.osgeo.org/grass/ticket/536#comment:18>
GRASS GIS <http://grass.osgeo.org>