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https://issues.apache.org/jira/browse/GROOVY-7866?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15996584#comment-15996584
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Paul King commented on GROOVY-7866:
-----------------------------------
Just simplifying the example to remove the trait:
{code}
ExpandoMetaClass.enableGlobally()
class Foo {
void attributes(Map attrs) {}
static stuff = {
attributes foo:"bar"
}
}
Foo.stuff()
{code}
> Groovy tries to invoke an instance method in a static context when using
> ExpandoMetaClass
> -----------------------------------------------------------------------------------------
>
> Key: GROOVY-7866
> URL: https://issues.apache.org/jira/browse/GROOVY-7866
> Project: Groovy
> Issue Type: Bug
> Affects Versions: 2.4.7
> Reporter: Graeme Rocher
>
> The following script:
> {code}
> ExpandoMetaClass.enableGlobally()
> trait Attributes {
> void attributes(Map attrs) {}
> }
> class Foo implements Attributes {
> String attributes
> static stuff = {
> attributes foo:"bar"
> }
> }
> new Foo().attributes(foo:'bar')
> Foo.stuff.call()
> {code}
> Produces
> {code}
> java.lang.IllegalArgumentException: object is not an instance of declaring
> class
> 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.invokeMethod(MetaClassImpl.java:1212)
> at groovy.lang.ExpandoMetaClass.invokeMethod(ExpandoMetaClass.java:1125)
> at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1021)
> at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1157)
> {code}
> I debugged the issue and there is some kind of caching logic that is broken.
> There is a `CachedMethod` instance that is invoked, even though it is not a
> static method.
> There should never be a case where the `attributes` method from the trait is
> invoked since it is an instance method and this is a static context.
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