[GRASS-user] Build error

[Rich Shepard]

On Slackware-14.2 I ran svn up on 7.7.svn, configured and built. This time
it failed because of an error in g.extensions. Changing to that directory
and running make produced this error:

> g.extension.tmp.html ; fi
Traceback (most recent call last):
   File "/home/rshepard/gis/grass/grass7_trunk/dist.i686-pc-linux-gnu/scripts/g.extension", line 146, in <module>
     from urllib.error import HTTPError, URLError
ImportError: No module named error
../../include/Make/Html.make:14: recipe for target 'g.extension.tmp.html' failed
make: *** [g.extension.tmp.html] Error 1
rm g.extension.tmp.html

urllib is in the site-packages directories for both python-2.7 and
python3-3.7.

Advice on what to do next is needed.

TIA,

Rich