[GRASS-dev] [GRASS GIS] #3846: r.contour started producing broken/segmented contour lines since 7.4

[GRASS GIS]

#3846: r.contour started producing broken/segmented contour lines since 7.4
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 Reporter:  metello    |      Owner:  grass-dev@…
     Type:  defect     |     Status:  new
 Priority:  normal     |  Milestone:
Component:  Raster     |    Version:  unspecified
 Keywords:  r.contour  |        CPU:  x86-64
 Platform:  MSWindows  |
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 Since GRASS 7.4, some contour lines generated by r.contour are broken into
 several segments (until 7.2 was ok). I have a system that uses r.contour
 to trace reservoirs for hydroelectric plants and that problem is breaking
 my algorithm.
 In the attached GRASS project, you can see the result generated by
 different GRASS versions (contour level = 229) - look at the largest
 contour line. I tested the following versions: 7.2.3, 7.4.4, 7.6 and
 7.7svn. Only 7.2.3 produced a continuous/unbroken contour.

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Ticket URL: <https://trac.osgeo.org/grass/ticket/3846>
GRASS GIS <https://grass.osgeo.org>