The following test fails at precompilation step:

api/java_util/concurrent/ExecutorCompletionService/index.html#ExecutorCompletionService

jtr file is attached.
The following minitest (extracted from ExecutorCompletionServiceTest.java) fails to compile with NPE since b64:
--------------------------------------------------------------------
import java.util.concurrent.*;

public class ExecutorCompletionServiceTest {
    ExecutorService e = new ThreadPoolExecutor(
            1, 1, 30L, TimeUnit.SECONDS,
            new ArrayBlockingQueue<Runnable>(1)) {
        protected <T> RunnableFuture<T> newTaskFor(Runnable t, T r) {
            return null;
        }
    };
}
--------------------------------------------------------------------
The work around from CR 6860795(-XDoldDiags) doesn't work.
Please find the stack trace in attached minitest.log.
The following test fails at precompilation stage as well:

api/javax_lang/model/element/UnknownElementException/index.html#UElementException

See 6861840 for jtr file is attached.

In short, the following java class fails to compile with the stack trace similar to reported:

-----------------
package javasoft.sqe.tests.api.javax.lang.model.element.UnknownElementException;

import java.lang.annotation.Annotation;
import java.util.List;
import java.util.Set;
import javax.lang.model.element.AnnotationMirror;
import javax.lang.model.element.Element;
import javax.lang.model.element.ElementKind;
import javax.lang.model.element.ElementVisitor;
import javax.lang.model.element.Modifier;
import javax.lang.model.element.Name;
import javax.lang.model.element.UnknownElementException;
import javax.lang.model.type.TypeMirror;


public class UElementExceptionTests {

    public void ctor0001() {
        Element[] elements = {
            new Element() {

                public List<? extends AnnotationMirror> getAnnotationMirrors() {
                    return null;
                }

                public <A extends Annotation> A getAnnotation(
                        Class<A> annotationType) {
                    return null;
                }

                public Set<Modifier> getModifiers() {
                    return null;
                }

                public Name getSimpleName() {
                    return null;
                }

                public Element getEnclosingElement() {
                    return null;
                }

                public List<? extends Element> getEnclosedElements() {
                    return null;
                }

                public <R, P> R accept(ElementVisitor<R, P> v, P p) {
                    return null;
                }
            }
        };

      
    }
}
--------------