Validatable objects to JSON conversion fails in grails7

[jglapa]

Expected Behavior

Conversion of objects with the Validateable interface started complaining about something related to creditCard validation... Works fine in grails 6

class MyCommand implements grails.validation.Validateable {
     Long id
}

def command = new MyCommand(id:10)

def result = command as grails.converters.JSON

assert result.toString() == '{"errors":{"errors":[]},"id":10}'.toString()

Actual Behaviour

it fails:

Caused by: org.grails.web.converters.exceptions.ConverterException: Error converting Bean with class grails.validation.ConstrainedDelegate
	at org.grails.web.converters.marshaller.json.GroovyBeanMarshaller.marshalObject(GroovyBeanMarshaller.java:88)
	at org.grails.web.converters.marshaller.json.GroovyBeanMarshaller.marshalObject(GroovyBeanMarshaller.java:43)
	at grails.converters.JSON.value(JSON.java:205)
	at grails.converters.JSON.convertAnother(JSON.java:165)
	at org.grails.web.converters.marshaller.json.MapMarshaller.marshalObject(MapMarshaller.java:47)
	at org.grails.web.converters.marshaller.json.MapMarshaller.marshalObject(MapMarshaller.java:32)
	at grails.converters.JSON.value(JSON.java:205)
	at grails.converters.JSON.convertAnother(JSON.java:165)
	at org.grails.web.converters.marshaller.json.GroovyBeanMarshaller.marshalObject(GroovyBeanMarshaller.java:70)
	at org.grails.web.converters.marshaller.json.GroovyBeanMarshaller.marshalObject(GroovyBeanMarshaller.java:43)
	at grails.converters.JSON.value(JSON.java:205)
	at grails.converters.JSON.render(JSON.java:140)
	at org.grails.web.converters.AbstractConverter.toString(AbstractConverter.java:123)
	... 41 common frames omitted
Caused by: java.lang.reflect.InvocationTargetException: null
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:569)
	at org.grails.web.converters.marshaller.json.GroovyBeanMarshaller.marshalObject(GroovyBeanMarshaller.java:68)
	... 53 common frames omitted
Caused by: groovy.lang.MissingPropertyException: CreditCard constraint only applies to a String property
	at grails.gorm.validation.DefaultConstrainedProperty.isCreditCard(DefaultConstrainedProperty.groovy:403)
	at grails.validation.ConstrainedDelegate.isCreditCard(ConstrainedDelegate.groovy:124)
	... 58 common frames omitted

Steps To Reproduce

paste the snippet into a freshly bootstrapped project, can be a controller action or even bootstrap init method

Environment Information

No response

Example Application

No response

Version

7.0.2

[matrei]

Possible duplicate of #15237 (fixed in #15238 and released in Grails 7.0.3)