id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
20864	Orphaned building parts	JsfasdF252	JsfasdF252	"==== What steps will reproduce the problem?
1. Add a closed way.
2. Tag it with building:part=*.
3. Run the JOSM validator

==== What is the expected result?
The validator should issue a warning/error about the building part being disjoint from any building.
==== What happens instead?
No such warning appears.
==== Please provide any additional information below. Attach a screenshot if possible.
I have made the error of orphaned building parts twice.
{{{
URL:https://josm.openstreetmap.de/svn/trunk
Repository:UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last:Changed Date: 2021-04-27 20:35:33 +0200 (Tue, 27 Apr 2021)
Build-Date:2021-04-27 21:58:39
Revision:17833
Relative:URL: ^/trunk

Identification: JOSM/1.5 (17833 en) Windows 10 64-Bit
OS Build number: Windows 10 Home 2009 (19042)
Memory Usage: 989 MB / 989 MB (118 MB allocated, but free)
Java version: 1.8.0_281-b09, Oracle Corporation, Java HotSpot(TM) Client VM
Look and Feel: com.sun.java.swing.plaf.windows.WindowsLookAndFeel
Screen: \Display0 1920×1080 (scaling 1.00×1.00)
Maximum Screen Size: 1920×1080
Best cursor sizes: 16×16→32×32, 32×32→32×32
System property file.encoding: Cp1252
System property sun.jnu.encoding: Cp1252
Locale info: en_US
Numbers with default locale: 1234567890 -> 1234567890
Dataset consistency test: No problems found

Plugins:
+ ShapeTools (1240)
+ apache-commons (35524)
+ apache-http (35589)
+ areaselector (368)
+ austriaaddresshelper (1597341117)
+ buildings_tools (35669)
+ ejml (35458)
+ gridify (1606242219)
+ imagery_offset_db (35640)
+ jna (35662)
+ log4j (35458)
+ mapwithai (1.7.1.5)
+ reltoolbox (35640)
+ turnrestrictions (35640)
+ utilsplugin2 (35691)
+ wms-turbo-challenge2 (35562)

Tagging presets:
+ https://raw.githubusercontent.com/osmlab/name-suggestion-index/main/dist/presets/nsi-josm-presets.min.xml

Map paint styles:
- https://josm.openstreetmap.de/josmfile?page=Styles/Lane_and_Road_Attributes&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/MapWithAI&zip=1

Last errors/warnings:
- 00012.054 E: Failed to locate image 'MapWithAI'
- 65343.835 E: java.lang.IllegalStateException: JOSM expected to find primitive [way -103396] in dataset but it is not there. Please report this at https://josm.openstreetmap.de. This is not a critical error, it should be safe to continue in your work.
}}}
"	enhancement	needinfo	normal		Core validator			template_report building:part building