[postgis-tickets] [PostGIS] #3884: topology failures in trunk

[PostGIS]

#3884: topology failures in trunk
----------------------+---------------------------
  Reporter:  robe     |      Owner:  pramsey
      Type:  defect   |     Status:  new
  Priority:  medium   |  Milestone:  PostGIS 2.5.0
 Component:  postgis  |    Version:  trunk
Resolution:           |   Keywords:
----------------------+---------------------------
Description changed by robe:

Old description:

> This seems to be happening on all bots
>

> {{{
>  regress/topogeo_addlinestring .. failed (diff expected obtained:
> /var/lib/jenkins/workspace/postgis/tmp/2_5_pg9.6w64/test_29_diff)
> -----------------------------------------------------------------------------
> --- regress/topogeo_addlinestring_expected      2017-10-06
> 21:25:46.075418731 +0000
> +++ /var/lib/jenkins/workspace/postgis/tmp/2_5_pg9.6w64/test_29_out
> 2017-10-06 21:26:12.335413798 +0000
> @@ -186,8 +186,7 @@
>  t3280.end|Topology 'bug3280' dropped
>  t3380.start|t
>  t3380.L1|1
> -t3380.L2|3
> -t3380.L2|4
> +ERROR:  Invalid edge (no two distinct vertices exist)
>  t3380.L3|5
>  t3380.end|Topology 'bug3380' dropped
>  t3402.start|t
> -----------------------------------------------------------------------------
> }}}
>

> I'tm guessing this isn't caused by topology directly but because of
> pramsey vaccuming and dusting in #3877

New description:

 This seems to be happening on all bots


 {{{
  regress/topogeo_addlinestring .. failed (diff expected obtained:
 /var/lib/jenkins/workspace/postgis/tmp/2_5_pg9.6w64/test_29_diff)
 -----------------------------------------------------------------------------
 --- regress/topogeo_addlinestring_expected      2017-10-06
 21:25:46.075418731 +0000
 +++ /var/lib/jenkins/workspace/postgis/tmp/2_5_pg9.6w64/test_29_out
 2017-10-06 21:26:12.335413798 +0000
 @@ -186,8 +186,7 @@
  t3280.end|Topology 'bug3280' dropped
  t3380.start|t
  t3380.L1|1
 -t3380.L2|3
 -t3380.L2|4
 +ERROR:  Invalid edge (no two distinct vertices exist)
  t3380.L3|5
  t3380.end|Topology 'bug3380' dropped
  t3402.start|t
 -----------------------------------------------------------------------------
 }}}


 I'tm guessing this isn't caused by topology directly but because of
 pramsey vaccuming and dusting in #3877.

 Issue started happening at r15925

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Ticket URL: <https://trac.osgeo.org/postgis/ticket/3884#comment:1>
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