[GRASS-dev] [bug #4868] (grass) r.mapcalc: segfault in 'if then'

[Glynn Clements]

Maciek Sieczka via RT wrote:

> > > r.mapcalc 'map=if(dtm,1)'
> > > Segmentation fault
> > 
> > I am unable to reproduce this.
> > 
> > Please provide a recipe to reproduce this with either the Spearfish
> > sample data or self-generated data.
> 
> Indeed, this is not 100% reproducible. Somehow it depends on a combination of
> input/output raster name lenght and the raster type (double/float/integer).

Okay, found it. The type inference code for if() was assigning types
to the 2nd/3rd/4th arguments regardless of whether that many arguments
were actually present, overflowing the array.

I've committed a fix to CVS.

-- 
Glynn Clements <glynn at gclements.plus.com>