[winGRASS] r.mapcalc Segmentation Faults

[David Finlayson]

I didn't build from source (I am using the windows port while I sort out 
build problems with my linux version of Grass).  Frustrating week.

Thanks for the heads up.  I had noticed after sending the email that the 
grids were OK  despite the message.

--
David Finlayson
Shoreline Geomorphology and GIS Modeling
University of Washington
Seattle, WA




>From: Glynn Clements <glynn.clements at virgin.net>
>To: "David Finlayson" <david_p_finlayson at hotmail.com>
>CC: wingrass at grass.itc.it
>Subject: Re: [winGRASS] r.mapcalc Segmentation Faults
>Date: Fri, 13 Jun 2003 05:57:37 +0100
>
>
>David Finlayson wrote:
>
> > I recently upgraded to WinGrass 5.0.2 on WinXP
> >
> > I get a segfault when I run the command:
> >
> > r.mapcalc 'water = if(dem90 < 0, dem90, null())'
> >
> > dem90 contains negative and positive elevations where negative 
>elevations
> > are water and zero is a valid elevation.
> >
> > I don't recall having trouble with this in the previous release.
>
>There is a known bug in 5.0.2's r.mapcalc which could result in a
>segfault while writing the history (i.e. after the computation has
>reached 100%).
>
>If you built from source, you can use the attached patch to fix that
>bug. If you obtained pre-compiled binaries ... hopefully someone will
>produce an updated r.mapcalc binary; a bug in r.mapcalc is a major
>problem.
>
>--
>Glynn Clements <glynn.clements at virgin.net>
>
>--- src/raster/r.mapcalc3/expression.c~	Sun Nov 17 09:18:01 2002
>+++ src/raster/r.mapcalc3/expression.c	Thu Apr 24 19:09:08 2003
>@@ -56,6 +56,7 @@
>  	argt[1] = e1->res_type;
>
>  	e->data.func.name = "";
>+	e->data.func.oper = NULL;
>  	e->data.func.func = f_int;
>  	e->data.func.argc = 1;
>  	e->data.func.args = args;
>@@ -77,6 +78,7 @@
>  	argt[1] = e1->res_type;
>
>  	e->data.func.name = "";
>+	e->data.func.oper = NULL;
>  	e->data.func.func = f_float;
>  	e->data.func.argc = 1;
>  	e->data.func.args = args;
>@@ -98,6 +100,7 @@
>  	argt[1] = e1->res_type;
>
>  	e->data.func.name = "";
>+	e->data.func.oper = NULL;
>  	e->data.func.func = f_double;
>  	e->data.func.argc = 1;
>  	e->data.func.args = args;

_________________________________________________________________
STOP MORE SPAM with the new MSN 8 and get 2 months FREE*  
http://join.msn.com/?page=features/junkmail