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Posted to notifications@groovy.apache.org by "Eric Milles (Jira)" <ji...@apache.org> on 2022/05/20 14:22:00 UTC

[jira] [Assigned] (GROOVY-10629) Subtyping does not work properly when having two bounded type parameters

     [ https://issues.apache.org/jira/browse/GROOVY-10629?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Eric Milles reassigned GROOVY-10629:
------------------------------------

    Assignee: Eric Milles

> Subtyping does not work properly when having two bounded type parameters
> ------------------------------------------------------------------------
>
>                 Key: GROOVY-10629
>                 URL: https://issues.apache.org/jira/browse/GROOVY-10629
>             Project: Groovy
>          Issue Type: Bug
>          Components: Static Type Checker
>            Reporter: Thodoris Sotiropoulos
>            Assignee: Eric Milles
>            Priority: Major
>
> This is related to GROOVY-10115
> I have the following program
> {code}
> class A<T> {
>   void m(T x) {}
> }
> class B<X extends Number, Y extends X> {
>   void test() {
>     A<X> x = new A<X>();
>     x.m((Y) null);
>   }
> }
> {code}
> h3. Actual behavior
> {code}
> org.codehaus.groovy.control.MultipleCompilationErrorsException: startup failed:
> test.groovy: 9: [Static type checking] - Cannot call A#m(X) with arguments [Y]
>  @ line 9, column 5.
>        x.m((Y) null);
>        ^
> 1 error
> {code}
> h3. Expected behavior
> Compile successfully
> Note: This bug occurs only when the type variable X is also bounded.
> Tested against master (commit: a976ecdee1f17f7fafc55767de2d857c44d44697)



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