Windows - Crash when creatin new mapset in GRASS with custom proyection with +towgs84

[fpacheco]

In Windows, QGis crash when the user trying to create a new mapset with a custom projection containing the parameter +towgs84. There is no problem in Linux.
To reproduce this bug:
1-run Qgis in Windows;
2-create a custom projection in QGis. For example ROU-USAM (Uruguay): +proj=tmerc +lat_0=-90 +lon_0=-55.8 +k=1.000000000 +x_0=500000 +y_0=0 +ellps=intl +towgs84=-155,171,37,0,0,0,0 +units=m +no_defs;
3-establish this or another projection in QGis;
4-begin to create a new mapset with GRASS (database,location, mapset). When you set the projection created in step 1, QGis crash.
Thanks. Fernando.

[homann]

This seems to be some sort of GRASS error. qgsgrassnewmapset calls GPJ_osr_to_grass and it appears that the crash is somewhere there.

This is the last output from WinXP before crash, see the (null) at last line:

Debug: c:/Qgis-devel/qgis_trunk/src/gui/qgsprojectionselector.cpp: 276: (getCurrentProj4String) mySrsId = 100000
Debug: c:/Qgis-devel/qgis_trunk/src/gui/qgsprojectionselector.cpp: 277: (getCurrentProj4String) USER_PROJECTION_START_ID = 100000
Debug: c:/Qgis-devel/qgis_trunk/src/gui/qgsprojectionselector.cpp: 294: (getCurrentProj4String) users qgis.db found
Debug: c:/Qgis-devel/qgis_trunk/src/gui/qgsprojectionselector.cpp: 301: (getCurrentProj4String) db = C:/Documents and Settings/homann/.qgis/
qgis.db
Debug: c:/Qgis-devel/qgis_trunk/src/gui/qgsprojectionselector.cpp: 320: (getCurrentProj4String) Selection sql: select parameters from tbl_sr
s where srs_id = 100000
Item selected : CrashTest
Item selected full string : +proj=tmerc +lat_0=-90 +lon_0=-55.8 +k=1.000000000 +x_0=500000 +y_0=0 +ellps=intl +towgs84=-155,171,37,0,0,0,0 +
units=m +no_defs
proj4 = +proj=tmerc +lat_0=-90 +lon_0=-55.8 +k=1.000000000 +x_0=500000 +y_0=0 +ellps=intl +towgs84=-155,171,37,0,0,0,0 +units=m +no_defs
OSRIsGeographic = 0
OSRIsProjected = 1
wkt = PROJCS["unnamed",GEOGCS["International 1909 (Hayford)",DATUM["unknown",SPHEROID["intl",6378388,297],TOWGS84[-155,171,37,0,0,0,0]],PRIM
EM["Greenwich",0],UNIT["degree",0.0174532925199433]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",-90],PARAMETER["centra
l_meridian",-55.8],PARAMETER["scale_factor",1],PARAMETER["false_easting",500000],PARAMETER["false_northing",0],UNIT["Meter",1]]
error_routine (fatal = 0): unable to open datum table file: (null)
No such file or directory

Program received signal SIGSEGV, Segmentation fault.
0x77c423e4 in wscanf () from /cygdrive/c/WINDOWS/system32/msvcrt.dll

Crash in wscanf due to nonexistinging file?

[homann]

In Ubuntu, I moved the file usr/lib/grass/etc/datum.table, and got similar response. No crash, however. Notice that file name is present

Debug: /home/homann/Qgis-Devel/qgis_trunk/src/gui/qgsprojectionselector.cpp: 320: (getCurrentProj4String) Selection sql: select parameters from tbl_srs where srs_id = 100007
Item selected : SWEREF 99 TM
Item selected full string : +proj=tmerc +lat_0=0 +lon_0=15 +k=0.9996 +x_0=500000 +y_0=0 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs
proj4 = +proj=tmerc +lat_0=0 +lon_0=15 +k=0.9996 +x_0=500000 +y_0=0 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs
OSRIsGeographic = 0
OSRIsProjected = 1
wkt = PROJCS["unnamed",GEOGCS["GRS 1980(IUGG, 1980)",DATUM["unknown",SPHEROID["GRS80",6378137,298.257222101],TOWGS84[0,0,0,0,0,0,0]],PRIMEM["Greenwich",0],UNIT["degree",0.0174532925199433]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",0],PARAMETER["central_meridian",15],PARAMETER["scale_factor",0.9996],PARAMETER["false_easting",500000],PARAMETER["false_northing",0],UNIT["Meter",1]]
error_routine (fatal = 0): unable to open datum table file: /usr/lib/grass/etc/datum.table
ret = 2
mProjInfo = 0x8c75120

[neteler]

The datum file is searched in $GISBASE/etc/datum.table". I suspect that it is missing there or unaccessible? It should work since the native winGRASS version also works.

Other source of error: white space in the path of $GISBASE - if so, please let the GRASS team know.

Markus

[neteler]

Note: the error is generated in grass63/lib/gis/datum.c

[(none)]

Milestone Version 0.9.2 deleted