[jira] [Created] (GROOVY-10624) Nested diamond operators do not work correctly although the expected type argument is known

[Thodoris Sotiropoulos (Jira)]

Thodoris Sotiropoulos created GROOVY-10624:
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             Summary: Nested diamond operators do not work correctly although 
the expected type argument is known
                 Key: GROOVY-10624
                 URL: https://issues.apache.org/jira/browse/GROOVY-10624
             Project: Groovy
          Issue Type: Bug
          Components: Static Type Checker
            Reporter: Thodoris Sotiropoulos


I have the following program:

{code}
class C<T> {
  C(D<T> x) {}
}

class D<T> {}


class Test {
  void test() {
    C<Float> x = new C<>(new D<>());
  }

}
{code}

h3. Actual behavior

{code}
org.codehaus.groovy.control.MultipleCompilationErrorsException: startup failed:
test.groovy: 10: [Static type checking] - Incompatible generic argument types. 
Cannot assign C<java.lang.Object> to: C<java.lang.Float>
 @ line 10, column 18.
       C<Float> x = new C<>(new D<>()); // type variables are instantiated with 
type Float because of the left-hand side.
                    ^

1 error
{code}

h3. Expected behavior

Compile successfully

Tested against master (commit: ee12bb52381e8f0583c61fc25d43de1f55b80a87)



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