ClassCastException: java.base/java.lang.Integer cannot be cast to java.base/java.lang.String

[naoliv]

I was testing some validator rules when I got this:

java.lang.ClassCastException: java.base/java.lang.Integer cannot be cast to java.base/java.lang.String
	at org.openstreetmap.josm.data.validation.tests.MapCSSTagChecker$TagCheck.ofMapCSSRule(MapCSSTagChecker.java:313)
	at org.openstreetmap.josm.data.validation.tests.MapCSSTagChecker$TagCheck.readMapCSS(MapCSSTagChecker.java:390)
	at org.openstreetmap.josm.data.validation.tests.MapCSSTagChecker.addMapCSS(MapCSSTagChecker.java:743)
	at org.openstreetmap.josm.data.validation.tests.MapCSSTagChecker.reloadRule(MapCSSTagChecker.java:845)
	at org.openstreetmap.josm.io.FileWatcher.processEvents(FileWatcher.java:147)
	at java.base/java.lang.Thread.run(Thread.java:844)

The wrong rule:

relation[type=public_transport][public_transport=stop_area_group] > way {
         throwWarning: eval(count(parent_tags(public_transport)));
}

JOSM:

Relative:URL: ^/trunk
Repository:UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last:Changed Date: 2017-12-05 00:58:56 +0100 (Tue, 05 Dec 2017)
Revision:13194
Build-Date:2017-12-05 02:33:31
URL:http://josm.openstreetmap.de/svn/trunk

Identification: JOSM/1.5 (13194 pt_BR) Linux Debian GNU/Linux testing (buster)
Memory Usage: 876 MB / 7168 MB (634 MB allocated, but free)
Java version: 9.0.1+11-Debian-1, Oracle Corporation, OpenJDK 64-Bit Server VM
Screen: :0.0 1600x900, :0.1 1280x1024
Maximum Screen Size: 1600x1024
Java package: openjdk-9-jre:amd64-9.0.1+11-1
Java ATK Wrapper package: libatk-wrapper-java:all-0.33.3-13
VM arguments: [--add-modules=java.activation,java.se.ee, -Dawt.useSystemAAFontSettings=on]
Dataset consistency test: No problems found

[Don-vip]

how do you launch JOSM?

[naoliv]

java --add-modules java.activation,java.se.ee -jar ~/josm/josm-latest.jar

[naoliv]

But the problem here isn't because I used throwWarning: eval(count(parent_tags(public_transport))); instead throwWarning: tr("{0}", eval(count(parent_tags(public_transport))));?

[Don-vip]

Yes, you're right. I can fix this :)

[Don-vip]

In 13195/josm:

fix #15641 - avoid CCE in MapCSSTagChecker