[jira] [Created] (WICKET-5647) missing generic cast causes compile error on OS X / jdk 8

["Peter Ertl (JIRA)" <ji...@apache.org>]

Peter Ertl created WICKET-5647:
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             Summary: missing generic cast causes compile error on OS X / jdk 8
                 Key: WICKET-5647
                 URL: https://issues.apache.org/jira/browse/WICKET-5647
             Project: Wicket
          Issue Type: Bug
          Components: wicket
    Affects Versions: 7.0.0-M2
         Environment: OS X 10.9.4
JDK 1.8.0_11
            Reporter: Peter Ertl
            Assignee: Peter Ertl


when trying to compile wicket-7 from HEAD it fails under OS X / JDK 1.8.0_11. Casting a NULL to generic type (T) solves the issues. This seems like some odd case of failing type inference.

The problematic source line is:

    return getEnumImpl(key, eClass, null);

The compiler error is:

  Error:(792, 35) java: incompatible types: inference variable T has incompatible upper bounds java.lang.Enum<T>,T

This will fix the issue:

    return getEnumImpl(key, eClass, (T)null);




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