FULL PRODUCT VERSION :
java version "1.5.0_05"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_05-b05)
Java HotSpot(TM) Client VM (build 1.5.0_05-b05, mixed mode, sharing)


A DESCRIPTION OF THE PROBLEM :
Invalid generics code does compiles under certain conditions

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Try to compile the code given.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
The code should not compile
ACTUAL -
The code compiles

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
package tests;

import java.util.Collection;
import java.util.Collections;

public class CompileTest1 {

	class Request<R extends Request<R, V>,V> {}

	class RequestMap {
		public <R extends Request<R, W>,W> R intersection (Collection<R> c) {
			// In my real code I make use of W of course
			return null;
		}
	}

	class DeltaRequest extends Request<DeltaRequest,double[]> {}

	public void test () {
		RequestMap m = new RequestMap ();
		Collection<DeltaRequest> c = Collections.singleton (new DeltaRequest ());
		// Why does this line compile?
		DeltaRequest o = m.intersection (c);
	}
}


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

CUSTOMER SUBMITTED WORKAROUND :
Err ...