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https://issues.apache.org/jira/browse/GROOVY-11255?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17799553#comment-17799553
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ASF GitHub Bot commented on GROOVY-11255:
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paulk-asert merged PR #2017:
URL: https://github.com/apache/groovy/pull/2017
> DGM#flatten flattens nested structures including arrays but not primitive
> arrays
> --------------------------------------------------------------------------------
>
> Key: GROOVY-11255
> URL: https://issues.apache.org/jira/browse/GROOVY-11255
> Project: Groovy
> Issue Type: Improvement
> Reporter: Paul King
> Assignee: Paul King
> Priority: Major
>
> Currently a cast exception is thrown in that case.
> Note this only applies in Groovy 5. Groovy 4 converted primitive arrays into
> lists before flattening them. Earlier alphas of Groovy 5 avoided creating
> such lists but we inadvertently didn't cater for primitives during array
> processing which is where the cast exception crept in.
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