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https://issues.apache.org/jira/browse/GROOVY-10754?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17716719#comment-17716719
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Thodoris Sotiropoulos commented on GROOVY-10754:
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[~emilles]The master version of Groovy does compile this program.
> Incompatible generic argument types when using wildcards
> --------------------------------------------------------
>
> Key: GROOVY-10754
> URL: https://issues.apache.org/jira/browse/GROOVY-10754
> Project: Groovy
> Issue Type: Bug
> Components: Static Type Checker
> Reporter: Thodoris Sotiropoulos
> Assignee: Eric Milles
> Priority: Minor
>
> I have the following program
> {code}
> class A<T> {}
> class B extends A<Boolean> {}
> class C<T extends A<Boolean>, U extends T> {
> C(T x, U v) {}
> }
> class Test {
> void test(B x, B y) {
> C<? extends B, ? extends B> z = new C<>(x, y);
> }
> }
> {code}
> h3. Actual behavior
> {code}
> org.codehaus.groovy.control.MultipleCompilationErrorsException: startup
> failed:
> test.groovy: 12: [Static type checking] - Incompatible generic argument
> types. Cannot assign C<A<java.lang.Boolean>, B> to: C<? extends B, ? extends
> B>
> @ line 12, column 37.
> C<? extends B, ? extends B> z = new C<>(x, y);
> ^
> 1 error
> {code}
> h3. Expected behavior
> Compile successfully
> *Notes*: The bug happens only when the class named C has two type parameters,
> and the second parameter is bounded to the first one
> Tested against master (commit: 099cf5b3f0ca61ea5daa72ebcea66ef09a74fd84)
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