Display key name when using regex

[naoliv]

When using something like this (to catch objects that have *_name but not a name):

*[/.+_name/][!name] {
        throwWarning: tr("has {0} but not {1}", "{0.key}", "{1.key}");
}

I only see has .+name= but not name as the output.
Changing {0.key} to {0.tag} has the same effect.

Am I missing something or JOSM doesn't support this?

[Don-vip]

#10859 might be the same problem.

[simon04]

In 8266/josm:

fix #9782 fix #10859 - MapCSS validator: evaluate real key and value for KeyConditions