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https://issues.apache.org/jira/browse/GROOVY-7481?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14608196#comment-14608196
]
Paul King commented on GROOVY-7481:
-----------------------------------
If you're not relying on duck-typing between those interface types, just cast
to the one you are (probably) using, e.g.:
{code}
class MyCollection extends ArrayList {
boolean addAll(Iterable items) { super.addAll(items) }
boolean addAll(Collection items) { super.addAll(items?:[]) }
}
new MyCollection().addAll((Collection)null)
{code}
> Update to Groovy 2.4.3 breaks existing code
> -------------------------------------------
>
> Key: GROOVY-7481
> URL: https://issues.apache.org/jira/browse/GROOVY-7481
> Project: Groovy
> Issue Type: Bug
> Components: groovy-runtime
> Affects Versions: 2.4.3
> Reporter: Alexander Veit
>
> After update to Groovy 2.4.3 coll.addAll() fails for null values.
> groovy.lang.GroovyRuntimeException: Ambiguous method overloading for method
> our.package.OurCollection#addAll.
> Cannot resolve which method to invoke for [null] due to overlapping
> prototypes between:
> [interface java.util.Collection]
> [interface java.lang.Iterable]
> [interface java.util.Iterator]
> at
> groovy.lang.MetaClassImpl.chooseMostSpecificParams(MetaClassImpl.java:3238)
> at
> groovy.lang.MetaClassImpl.chooseMethodInternal(MetaClassImpl.java:3191)
> at groovy.lang.MetaClassImpl.chooseMethod(MetaClassImpl.java:3134)
> at
> groovy.lang.MetaClassImpl.getMethodWithCachingInternal(MetaClassImpl.java:1325)
> at groovy.lang.MetaClassImpl.createPojoCallSite(MetaClassImpl.java:3367)
> at
> org.codehaus.groovy.runtime.callsite.CallSiteArray.createPojoSite(CallSiteArray.java:129)
> at
> org.codehaus.groovy.runtime.callsite.CallSiteArray.createCallSite(CallSiteArray.java:163)
> at
> org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:45)
> at
> org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:110)
> at
> org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:122)
> at test.run(test.groovy:62)
> at groovy.lang.GroovyShell.evaluate(GroovyShell.java:589)
> at groovy.lang.GroovyShell.evaluate(GroovyShell.java:636)
> ...
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