[GRASS-dev] [GRASS GIS] #2368: Python version of r.grow does not support shrinking

[GRASS GIS]

#2368: Python version of r.grow does not support shrinking
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  Reporter:  wenzeslaus  |      Owner:  grass-dev@…
      Type:              |     Status:  new
  enhancement            |
  Priority:  minor       |  Milestone:  7.2.0
 Component:  Raster      |    Version:  svn-trunk
Resolution:              |   Keywords:  r.grow, r.grow.distance, r.buffer,
       CPU:              |  r.buffer.lowmem
  Unspecified            |   Platform:  Unspecified
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Comment (by neteler):

 Just tested r.grow with a negative radius and the following error occurs:
 {{{
 # NC sample dataset
 v.in.region box
 v.to.rast input=box output=box use=val val=1

 r.grow input=box output=box_shrink radius=-20.01
 Reading raster map <box>...
  100%
 Writing output raster maps...
  100%
 ERROR 1: PredictorSetup:Horizontal differencing "Predictor" not supported
 with 64-bit samples
 ERROR 1: PredictorSetup:Horizontal differencing "Predictor" not supported
 with 64-bit samples
 ERROR 1: PredictorSetup:Horizontal differencing "Predictor" not supported
 with 64-bit samples
 ERROR 1: PredictorSetup:Horizontal differencing "Predictor" not supported
 with 64-bit samples
  100%
 ERROR 1: PredictorSetup:Horizontal differencing "Predictor" not supported
 with 64-bit samples
 ERROR 1: PredictorSetup:Horizontal differencing "Predictor" not supported
 with 64-bit samples
 Color table for raster map <box_shrink> set to 'box'
 }}}

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Ticket URL: <https://trac.osgeo.org/grass/ticket/2368#comment:10>
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