java.lang.IllegalArgumentException, Groovy 2.4.7, _might_ be caused by Java 8

[o...@ocs.cz]

Hi there,

I have got the following code (part of a big project):

===
class AuctionTable extends SecureComponent {
    public AuctionTable(WOContext context) {
        super(context)
        showClosedAuctions=... some expression ... // the fail line 8, see 
please below
... ...
    }    
    boolean showClosedAuctions
... ...
===

which works without a glitch on my old computer (Java 1.7.0_13 / Mac OS X 
10.8.5). Alas, it reliably fails with my new one (Java 1.8.0_45 / Mac OS X 
10.12.5) this way:

===
...
Caused by: java.lang.IllegalArgumentException
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:497)
        at 
org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:93)
        at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:325)
        at groovy.lang.MetaClassImpl.setProperty(MetaClassImpl.java:2705)
        at groovy.lang.ExpandoMetaClass.setProperty(ExpandoMetaClass.java:1185)
        at groovy.lang.MetaClassImpl.setProperty(MetaClassImpl.java:3747)
        at components.sharedcode.OCSComponent.setProperty(OCSComponent.groovy)
        at 
org.codehaus.groovy.runtime.ScriptBytecodeAdapter.setGroovyObjectProperty(ScriptBytecodeAdapter.java:532)
        at components.sharedparts.AuctionTable.<init>(AuctionTable.groovy:8)
===

Does it make any sense? Can anybody here see the culprit and suggest a fix?

Thanks a lot,
OC