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https://issues.apache.org/jira/browse/GROOVY-9710?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sam Gleske updated GROOVY-9710:
-------------------------------
Description:
h2. Description
[List.intersect|http://docs.groovy-lang.org/latest/html/groovy-jdk/java/util/List.html#intersect(java.lang.Iterable)]
preserves the ordering of the source list in Groovy 2.4 but instead takes the
ordering of the intersecting list. This can lead to unexpected behavior in
Groovy applications as code migrates to newer versions of Groovy.
h2. Example code
{code:java}
// Passes assertion in Groovy 2.4.20 but fails in Groovy 2.5.13 and 3.0.5
0
assert ['a', 'b'].intersect(['c', 'b', 'a']) == ['a', 'b']{code}
h2. Expected behavior
The order of the first list is preserved.
h2. Actual behavior
The order of the second list takes precedence.
h2. Groovy version matrix
||Groovy version||Behavior||
|2.4.20|Assertion passes|
|2.5.13|Assertion fails (order reversed) |
|3.0.5|Assertion fails (order reversed) |
was:
h2. Description
List.intersect preserves the ordering of the source list in Groovy 2.4 but
instead takes the ordering of the intersecting list. This can lead to
unexpected behavior in Groovy applications as code migrates to newer versions
of Groovy.
h2. Example code
{code:java}
// Passes assertion in Groovy 2.4.20 but fails in Groovy 2.5.13 and 3.0.5
0
assert ['a', 'b'].intersect(['c', 'b', 'a']) == ['a', 'b']{code}
h2. Expected behavior
The order of the first list is preserved.
h2. Actual behavior
The order of the second list takes precedence.
h2. Groovy version matrix
||Groovy version||Behavior||
|2.4.20|Assertion passes|
|2.5.13|Assertion fails (order reversed) |
|3.0.5|Assertion fails (order reversed) |
> List.intersect changes behavior from Groovy 2.4 and Groovy 2.5+
> ---------------------------------------------------------------
>
> Key: GROOVY-9710
> URL: https://issues.apache.org/jira/browse/GROOVY-9710
> Project: Groovy
> Issue Type: Bug
> Components: groovy-runtime
> Affects Versions: 3.0.5, 2.5.13
> Environment: Ubuntu 18.04.5 LTS
> OpenJDK Java 1.8.0_265 (Private Build 25.265-b01)
> Gradle 5.6.3
> Reporter: Sam Gleske
> Priority: Major
>
> h2. Description
> [List.intersect|http://docs.groovy-lang.org/latest/html/groovy-jdk/java/util/List.html#intersect(java.lang.Iterable)]
> preserves the ordering of the source list in Groovy 2.4 but instead takes
> the ordering of the intersecting list. This can lead to unexpected behavior
> in Groovy applications as code migrates to newer versions of Groovy.
> h2. Example code
> {code:java}
> // Passes assertion in Groovy 2.4.20 but fails in Groovy 2.5.13 and 3.0.5
> 0
> assert ['a', 'b'].intersect(['c', 'b', 'a']) == ['a', 'b']{code}
> h2. Expected behavior
> The order of the first list is preserved.
> h2. Actual behavior
> The order of the second list takes precedence.
> h2. Groovy version matrix
> ||Groovy version||Behavior||
> |2.4.20|Assertion passes|
> |2.5.13|Assertion fails (order reversed) |
> |3.0.5|Assertion fails (order reversed) |
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