FULL PRODUCT VERSION :
java version "1.7.0-ea"
Java(TM) SE Runtime Environment (build 1.7.0-ea-b70)
Java HotSpot(TM) 64-Bit Server VM (build 16.0-b07, mixed mode)


ADDITIONAL OS VERSION INFORMATION :
Linux n050409 2.6.22.19-lustre.1.6.5.1 #2 SMP Tue Oct 28 14:06:20 CET 2008 x86_64 x86_64 x86_64 GNU/Linux

A DESCRIPTION OF THE PROBLEM :
Compilation of a recursive type parameter usage gives an error. Compilation on JDK 1.6 works.


STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
javac -d . Fact_j17.java


EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Compiles without errors.
ACTUAL -
compile errors


ERROR MESSAGES/STACK TRACES THAT OCCUR :
Fact_j17.java:6: type parameter AlgebraicNumber<C> is not within its bound
    public Fact_j17<AlgebraicNumber<C>> xyz;
                                   ^
  where C is a type-variable:
    C extends GcdRingElem<C> declared in class Fact_j17
1 error


REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
public class Fact_j17<C extends GcdRingElem<C>> {
    public Fact_j17<AlgebraicNumber<C>> xyz;
}

class AlgebraicNumber<C extends GcdRingElem<C>> implements GcdRingElem<AlgebraicNumber<C>> {
}

interface GcdRingElem<C extends GcdRingElem<C>> {
}

---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
stay with JDK 1.6

Release Regression From : 6u16
The above release value was the last known release where this 
bug was not reproducible. Since then there has been a regression.