[jira] [Resolved] (GROOVY-7179) Type inference fails on the return value of inject()

["Eric Milles (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/GROOVY-7179?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Eric Milles resolved GROOVY-7179.
---------------------------------
    Resolution: Fixed

> Type inference fails on the return value of inject()
> ----------------------------------------------------
>
>                 Key: GROOVY-7179
>                 URL: https://issues.apache.org/jira/browse/GROOVY-7179
>             Project: Groovy
>          Issue Type: Bug
>          Components: Static compilation
>    Affects Versions: 2.3.7, 2.4.1
>            Reporter: Yu Kobayashi
>            Priority: Major
>
> Type inference fails on the return value of inject().
> {code}
> @groovy.transform.CompileStatic
> List<Integer> test() {
>     (2..3).inject([1], { list, i -> list << i })
> }
> println test()
> {code}
> Error message:
> {code}
> org.codehaus.groovy.control.MultipleCompilationErrorsException: startup failed:
> C:\Users\Yu\Desktop\test.groovy: 3: [Static type checking] - Cannot return value of type java.lang.Object on method returning type java.util.List <Integer> @ line 3, column 5.
>        (2..3).inject([1], { list, i -> list + i })
>        ^
> {code}
> By the way, IntelliJ IDEA 14 fails on inferencing closure argument types, and success on the return type for this code.



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