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https://issues.apache.org/jira/browse/GROOVY-7624?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Paul King resolved GROOVY-7624.
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Resolution: Fixed
Fix Version/s: 2.5.0-rc-1
Proposed PR merged. Thanks for raising the issue.
> Collection asImmutable() methods aren't immutable
> -------------------------------------------------
>
> Key: GROOVY-7624
> URL: https://issues.apache.org/jira/browse/GROOVY-7624
> Project: Groovy
> Issue Type: Bug
> Components: groovy-jdk
> Affects Versions: 2.4.5
> Reporter: Christopher Smith
> Assignee: Paul King
> Priority: Minor
> Labels: breaking
> Fix For: 2.5.0-rc-1
>
>
> The contract for the Collection {{asImmutable()}} methods specify that the
> returned collection is immutable, but in fact the collection is merely
> read-only; it uses {{Collections.unmodifiable*()}}, which wraps an underlying
> collection that is still mutable.
> These methods should return actual immutable collections, either using
> Collections unmodifiables with copies of the underlying collections or using
> an actual immutable backing implementation, a la Guava.
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