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https://issues.apache.org/jira/browse/GROOVY-7654?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16053417#comment-16053417
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ASF GitHub Bot commented on GROOVY-7654:
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Github user asfgit closed the pull request at:
https://github.com/apache/groovy/pull/546
> Iterable as List and Iterable.asList() have different semantics
> ---------------------------------------------------------------
>
> Key: GROOVY-7654
> URL: https://issues.apache.org/jira/browse/GROOVY-7654
> Project: Groovy
> Issue Type: Bug
> Components: groovy-jdk
> Affects Versions: 2.4.5
> Reporter: Shil Sinha
> Assignee: Paul King
> Fix For: 2.4.12
>
>
> For an Iterable `foo` which is not also a collection, `foo.asList()` and `foo
> as List` are not equivalent. The latter goes through the asType(Object,
> Class) path and ultimately returns a proxy. This is unexpected, and can
> result in some inconsistencies. A simple example:
> {code}
> class IterableWrapper implements Iterable {
> Iterable delegate
> Iterator iterator() {
> delegate.iterator()
> }
> }
> def itw = new IterableWrapper(delegate: [1,2,3])
> def itwAsList = itw.asList()
> def itwAsTypeList = itw as List
> assert itwAsList == itwAsTypeList
> assert itwAsList[0] == itwAsTypeList[0]
> {code}
> The first assertion passes, but the second fails with:
> {code}
> groovy.lang.MissingMethodException: No signature of method:
> IterableWrapper.get() is applicable for argument types: (java.lang.Integer)
> values: [0]
> {code}
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