id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
23852	Warn about width=0	Famlam	team	"==== What steps will reproduce the problem?
1. Validate any of the [https://taginfo.openstreetmap.org/tags/width=0#overview 8516] ways with `width=0`

==== What is the expected result?
A warning that `width=0` is a very unlikely width of anything

==== What happens instead?
No warning

==== Please provide any additional information below. Attach a screenshot if possible.
There's 8516 ways with `width=0`, of which 7452 in combination with `highway` and 964 in combination with `waterway`. It seems at least some of them were added due to an [https://github.com/openstreetmap/iD/issues/5087 old bug] of iD (and possibly the number grows due to ways getting split).
A width of 0 is physically impossible: an object cannot exist at 0 width (in a 3-dimensional world)

Possible rules to warn against these kind of cases:

{{{#!mapcss
way[width=0] {
  throwWarning: tr(""unusual value of {0}"", ""{0.key}"");
}
}}}
or, to include unit support:
{{{#!mapcss
way[width][siunit_length(tag(""width"")) = 0] {
  throwWarning: tr(""unusual value of {0}"", ""{0.key}"");
}
}}}


{{{
Revision:19160
Build-Date:2024-08-01 15:31:59

Identification: JOSM/1.5 (19160 nl) Windows 10 64-Bit
OS Build number: Windows 10 Home 22H2 (19045)
Memory Usage: 315 MB / 2012 MB (17 MB allocated, but free)
Java version: 21.0.4+7-LTS, Azul Systems, Inc., OpenJDK 64-Bit Server VM
Look and Feel: com.sun.java.swing.plaf.windows.WindowsLookAndFeel
Screen: \Display0 1920x1080x32bpp@60Hz (scaling 1.10×1.10)
Maximum Screen Size: 1920×1080
Best cursor sizes: 16×16→32×32, 32×32→32×32
System property file.encoding: UTF-8
System property sun.jnu.encoding: Cp1252
Locale info: nl_NL
Numbers with default locale: 1234567890 -> 1234567890
VM arguments: [-Djpackage.app-version=1.5.19160, --add-modules=java.scripting,java.sql,javafx.controls,javafx.media,javafx.swing,javafx.web, --add-exports=java.base/sun.security.action=ALL-UNNAMED, --add-exports=java.desktop/com.sun.imageio.plugins.jpeg=ALL-UNNAMED, --add-exports=java.desktop/com.sun.imageio.spi=ALL-UNNAMED, --add-opens=java.base/java.lang=ALL-UNNAMED, --add-opens=java.base/java.nio=ALL-UNNAMED, --add-opens=java.base/jdk.internal.loader=ALL-UNNAMED, --add-opens=java.base/jdk.internal.ref=ALL-UNNAMED, --add-opens=java.desktop/javax.imageio.spi=ALL-UNNAMED, --add-opens=java.desktop/javax.swing.text.html=ALL-UNNAMED, --add-opens=java.prefs/java.util.prefs=ALL-UNNAMED, -Djpackage.app-path=%UserProfile%\AppData\Local\JOSM\JOSM.exe]

Plugins:
+ OpeningHoursEditor (36258)
+ imagery_offset_db (36289)
+ measurement (36256)
+ pbf (36282)
+ pt_assistant (637)
+ reverter (36256)
+ tageditor (36298)
+ turnlanes-tagging (0.0.5)
+ undelete (36298)
+ utilsplugin2 (36298)

Map paint styles:
+ https://josm.openstreetmap.de/josmfile?page=Styles/Potlatch2&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/Lane_and_Road_Attributes&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/PublicTransport&zip=1
+ %UserProfile%\Documents\tijdelijke bestanden\josm-eigen.mappaint.mapcss
+ https://josm.openstreetmap.de/josmfile?page=Styles/Sidewalks&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/ParkingLanes&zip=1

Validator rules:
+ %UserProfile%\Documents\tijdelijke bestanden\josm-eigen.validator.mapcss
+ https://josm.openstreetmap.de/josmfile?page=Rules/SuspiciousSwimming_Pool&zip=1
+ https://raw.githubusercontent.com/osm-fr/osmose-backend/master/plugins/TagFix_Destination.validator.mapcss
+ https://raw.githubusercontent.com/osm-fr/osmose-backend/master/plugins/Colour.validator.mapcss
+ https://raw.githubusercontent.com/osm-fr/osmose-backend/master/plugins/notprefix.validator.mapcss
+ https://raw.githubusercontent.com/osm-fr/osmose-backend/master/plugins/TagFix_MultipleTag2.validator.mapcss
+ https://raw.githubusercontent.com/Famlam/OsmMapcssValidationNL/main/netherlands.validator.mapcss

Last errors/warnings:
- 00001.310 W: extended font config - overriding 'filename.Malgun_Gothic=malgun.ttf' with 'MALGUN.TTF'
- 00001.312 W: extended font config - overriding 'filename.Myanmar_Text=mmrtext.ttf' with 'MMRTEXT.TTF'
- 00001.313 W: extended font config - overriding 'filename.Mongolian_Baiti=monbaiti.ttf' with 'MONBAITI.TTF'
- 00002.437 E: java.security.KeyStoreException: Windows-ROOT not found. Oorzaak: java.security.NoSuchAlgorithmException: Windows-ROOT KeyStore not available
}}}
"	enhancement	new	normal		Core validator			template_report width