Terracer-with-Relation is Removing the Previous House Relation Member + other errors

[alexkemp]

This is a bizarro series of errors, so please have patience. I think that I've found a scenario that will allow the issues to be seen clearly.

I'm working upon a section of the map (Plantagenet Court) where Address-nodes have been previously added, but neither houses nor associatedStreet relations have been added, and I am adding those latter whilst attempting to retain previous history.

What steps will reproduce the problem?

1. Update whole system, including JOSM.
2. Use Building tools to draw 2 buildings

(abutting each other, as at end will be joined as a terrace)

3. Select righthand house + street & initiate terracer

(no house numbers selected, only number of segments + associatedStreet is ON - this has worked flawlessly for 12 months until very recently)

4. After pressing <OK> a Conflict Resolution dialog appears

(a splendid bug in itself, as there should be zero conflicts to resolve)
(the dialog asks whether to *keep* or *remove* the relation for House-5; I choose 'keep')
(this is a bug, as 5 Plantagenet Court is uninvolved in the process - see begin.png)

5. After pressing <Apply> the 2 semi-detached houses are correctly created but, checking back at No.5, we see that it's associatedStreet relation has been removed.

6. Whilst restoring the associatedStreet relation for No.5, I notice that there is an extra (unknown) relation in addition to the 2 un-numbered semi-detached relations just entered

(above No.5 after being sorted)

7. Now select the right-hand semi-detached just created + the Address-node + initiate terracer (this is the soon-to-be No.4)
8. After pressing <OK> a Conflict Resolution dialog appears yet again, asking whether I wish to keep/delete each of 3 (three) x 'House number 4'. Splendid. I choose keep/remove/remove:

9. Pressing <Apply> correctly creates the house + (hopefully) retains the history. Checking back at the relation, No.4 is created & only the final un-numbered half of the semi is left.
10. Repeating the above with the left-hand semi (No.3) gives a Conflict dialog with just 2 options

11. The two houses are now created. The bell rings & I slink across to my corner. My trainer towels me down & whispers encouraging sentiments. I'm unsure, and am not looking forward to the next round.

What is the expected result?

Almost none of the above

What happens instead?

All of the above

Please provide any additional information below. Attach a screenshot if possible.

I've restarted & retried with another set of similar houses, but this time with JOSM 11639 (stable) + terracer 33088. The behaviour is identical.
The essence appears to be creating 2 copies of the house within the relation when using a previously-created Address-node. However, I have zero idea as to where on earth deleting the previous house comes from.

URL:http://josm.openstreetmap.de/svn/trunk
Repository:UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last:Changed Date: 2017-03-10 23:18:47 +0100 (Fri, 10 Mar 2017)
Build-Date:2017-03-11 02:32:07
Revision:11715
Relative:URL: ^/trunk

Identification: JOSM/1.5 (11715 en_GB) Linux Debian GNU/Linux 8.7 (jessie)
Memory Usage: 699 MB / 1636 MB (217 MB allocated, but free)
Java version: 1.8.0_121-8u121-b13-1~bpo8+1-b13, Oracle Corporation, OpenJDK 64-Bit Server VM
Screen: :0.0 1366x768
Maximum Screen Size: 1366x768
Java package: openjdk-8-jre:amd64-8u121-b13-1~bpo8+1
Java ATK Wrapper package: libatk-wrapper-java:all-0.30.5-1
VM arguments: [-Djosm.restart=true, -Djosm.dir.name=JOSM-latest, -Djava.net.useSystemProxies=true]
Dataset consistency test: No problems found

Plugins:
+ DirectUpload (33182)
+ Mapillary (v1.4.2)
+ apache-commons (32994)
+ apache-http (32699)
+ buildings_tools (33004)
+ continuosDownload (53)
+ terracer (33088)

Last errors/warnings:
- W: java.net.UnknownHostException: api.openstreetmap.org
- W: Already here java.net.UnknownHostException: api.openstreetmap.org
- E: java.net.UnknownHostException: api.openstreetmap.org
- W: org.openstreetmap.josm.io.OsmTransferException: Could not connect to the OSM server. Please check your internet connection.. Cause: java.net.UnknownHostException: api.openstreetmap.org
- W: java.net.UnknownHostException: api.openstreetmap.org
- W: Already here java.net.UnknownHostException: api.openstreetmap.org
- E: java.net.UnknownHostException: api.openstreetmap.org
- W: org.openstreetmap.josm.io.OsmTransferException: Could not connect to the OSM server. Please check your internet connection.. Cause: java.net.UnknownHostException: api.openstreetmap.org
- E: Handled by bug report queue: org.openstreetmap.josm.data.osm.DataIntegrityProblemException: Primitive must be part of the dataset: {Node id=4256750513 version=1 MDT lat=52.9584777,lon=-1.1383649}
- W: The amount of running downloads is equal to 0

[alexkemp]

photos of the autopsy, stage by horrible stage

[alexkemp]

photos of the autopsy, stage by horrible stage

[alexkemp]

photos of the autopsy, stage by horrible stage

[alexkemp]

photos of the autopsy, stage by horrible stage

[alexkemp]

photos of the autopsy, stage by horrible stage

[alexkemp]

photos of the autopsy, stage by horrible stage