FULL PRODUCT VERSION :
"1.5.0" build 1.5.0-b64

ADDITIONAL OS VERSION INFORMATION :
WindowsXP sp2

A DESCRIPTION OF THE PROBLEM :
The following code generates a compilation problem on the last line of class X: String s = secondInterface.find(new Integer(1));
SecondInterface has clearly specified String & Integer when it extends FirstInterface, and one should be able to invoke a method against a variable defined as a SecondInterface when the method is from the FirstInterface.


STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Run the code that is supplied

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
No compilation problem
ACTUAL -
Compilation error on the last statement in class X...

incompatible types
found : java.lang.Object
requried: java.lang.String

ERROR MESSAGES/STACK TRACES THAT OCCUR :
Compilation error on the last statement in class X...

incompatible types
found : java.lang.Object
requried: java.lang.String

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------

interface FirstInterface <O,N> {
    public O find(N number);
}

interface SecondInterface <T extends CharSequence> extends FirstInterface<String, Integer> {
    public String convert(T charSequence);
}


class SecondClass implements SecondInterface<StringBuilder> {
    public String find(Integer i) { return null; }
    public String convert(StringBuilder stringBuilder) { return null; }
}

class X {
    public static void main(String[] args) {
        SecondInterface secondInterface = new SecondClass();
        secondInterface.find(new Integer(1));
        String s = secondInterface.find(new Integer(1));
    }
}
---------- END SOURCE ----------