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https://issues.apache.org/jira/browse/GROOVY-7876?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15392796#comment-15392796
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ASF GitHub Bot commented on GROOVY-7876:
----------------------------------------
Github user asfgit closed the pull request at:
https://github.com/apache/groovy/pull/372
> ClassCastException when calling DefaultTypeTransformation#compareEqual
> ----------------------------------------------------------------------
>
> Key: GROOVY-7876
> URL: https://issues.apache.org/jira/browse/GROOVY-7876
> Project: Groovy
> Issue Type: Bug
> Affects Versions: 2.4.6
> Reporter: Andrew White
> Assignee: Paul King
> Fix For: 2.4.8
>
>
> It appears that comparing two objects that both implement comparable with
> DefaultTypeTransformation#compareEqual is not safe in all cases. Consider
> enums for example, which throw exceptions when compared to differing classes.
> This is using Eclipse Collections for pairs but the idea is the same in
> general.
> {code}
> enum E1 {A, B, C}
> enum E2 {D, E, F}
> def "test groovy oddness"() {
> when:
> def test = DefaultTypeTransformation.compareEqual(
> Tuples.pair(E1.A, 1),
> Tuples.pair(E2.D, 1))
> then:
> assert test == false
> }
> {code}
> Stacktrace
> {code}
> java.lang.ClassCastException
> at java.lang.Enum.compareTo(Enum.java:180)
> at java.lang.Enum.compareTo(Enum.java:55)
> at
> org.eclipse.collections.impl.tuple.PairImpl.compareTo(PairImpl.java:95)
> at
> org.eclipse.collections.impl.tuple.PairImpl.compareTo(PairImpl.java:22)
> at com.GroovyTests.test groovy oddness(GroovyTests.groovy:36)
> {code}
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