id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
14202	[Patch] Validator didn't complain about a node beeing used more than once in a closed way [regression?]	mdk	team	"==== What steps will reproduce the problem?
1. Open ''invalidArea.osm''
2. Validate

==== What is the expected result?
Warning or error like ''way contains node more than once''. 

==== What happens instead?
No error, warning or hint.

==== Please provide any additional information below. Attach a screenshot if possible.
I'm not 100% sure, but I think the validator has detected such errors in the past (but I can't tell you when).
The specialty is, that in a closed way, start end end is the same node. Nevertheless, this is the only allowed duplication of a node. In this case the start node also appears a third time in the middle of the way, which is illegal. But it looks like the Validator ignores ALL duplication of the start node: 
{{{
  <way id='-30906' action='modify' visible='true'>
    <nd ref='-30981' />
    <nd ref='-30677' />
    <nd ref='-30981' />  <- this is not allowed
    <nd ref='-30651' />
    <nd ref='-30650' />
    <nd ref='-30653' />
    <nd ref='-30652' />
    <nd ref='-30981' />
    <tag k='building' v='yes' />
  </way>
}}}

{{{
URL:http://josm.openstreetmap.de/svn/trunk
Repository:UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last:Changed Date: 2017-01-03 19:14:48 +0100 (Tue, 03 Jan 2017)
Build-Date:2017-01-04 02:32:31
Revision:11429
Relative:URL: ^/trunk

Identification: JOSM/1.5 (11429 en) Linux Ubuntu 16.10
Memory Usage: 798 MB / 1774 MB (204 MB allocated, but free)
Java version: 1.8.0_111-8u111-b14-2ubuntu0.16.10.2-b14, Oracle Corporation, OpenJDK 64-Bit Server VM
Screen: :0.0 1920x1080
Maximum Screen Size: 1920x1080
Java package: openjdk-8-jre:amd64-8u111-b14-2ubuntu0.16.10.2
VM arguments: [-Djosm.restart=true, -Djosm.dir.name=JOSM-latest, -Djava.net.useSystemProxies=true]
Dataset consistency test: No problems found

Plugins:
+ ColumbusCSV (32885)
+ FastDraw (33004)
+ HouseNumberTaggingTool (32699)
+ OpeningHoursEditor (33004)
+ RoadSigns (33088)
+ SimplifyArea (33004)
+ buildings_tools (33004)
+ contourmerge (1030)
+ imagery-xml-bounds (33004)
+ imagery_offset_db (33004)
+ pbf (33004)
+ poly (33004)
+ public_transport (33088)
+ reltoolbox (33088)
+ reverter (33088)
+ terracer (33088)
+ turnrestrictions (33088)
+ utilsplugin2 (33088)

Tagging presets:
+ https://josm.openstreetmap.de/josmfile?page=Presets/OneClick&zip=1
+ https://josm.openstreetmap.de/josmfile?page=Presets/LaneAttributes&preset&zip=1

Map paint styles:
+ https://josm.openstreetmap.de/josmfile?page=Styles/Lane_and_Road_Attributes&zip=1
+ https://josm.openstreetmap.de/josmfile?page=Styles/Maxspeed&style&zip=1

Last errors/warnings:
- W: Cannot start IPv4 remotecontrol https server on port 8112: Keystore was tampered with, or password was incorrect
- W: Cannot start IPv6 remotecontrol https server on port 8112: Keystore was tampered with, or password was incorrect
}}}
"	defect	closed	major	17.01	Core validator	latest	fixed	template_report	bastiK GerdP Klumbumbus