Duplicate variable in lambda causes javac crash

FULL PRODUCT VERSION :
javac 1.8.0-ea (from jdk-8-ea-bin-b90-linux-x64-16_may_2013.tar.gz)

ADDITIONAL OS VERSION INFORMATION :
Linux ... 3.5.0-30-generic #51-Ubuntu SMP Tue May 14 18:47:48 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux

A DESCRIPTION OF THE PROBLEM :
NullPointerException compiling the included program.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
CP=/usr/share/java/junit4.jar
JAVAC=~/jdk1.8.0/bin/javac
JAVA=~/jdk1.8.0/bin/java

$JAVAC -cp $CP EBug2.java && $JAVA -cp $CP:. org.junit.runner.JUnitCore EBug2


EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Expecting tryAdvance() to accept the given Consumer(), and compile (or give proper compile error, maybe)
ACTUAL -
See error message.

ERROR MESSAGES/STACK TRACES THAT OCCUR :
An exception has occurred in the compiler (1.8.0-ea). Please file a bug at the Java Developer Connection (http://java.sun.com/webapps/bugreport) after checking the Bug Parade for duplicates. Include your program and the following diagnostic in your report. Thank you.
java.lang.NullPointerException
at com.sun.tools.javac.comp.Check.duplicateError(Check.java:325)
at com.sun.tools.javac.comp.Check.checkTransparentVar(Check.java:363)
at com.sun.tools.javac.comp.MemberEnter.visitVarDef(MemberEnter.java:650)
at com.sun.tools.javac.tree.JCTree$JCVariableDecl.accept(JCTree.java:828)
at com.sun.tools.javac.comp.MemberEnter.memberEnter(MemberEnter.java:419)
at com.sun.tools.javac.comp.Attr.visitVarDef(Attr.java:1043)
at com.sun.tools.javac.tree.JCTree$JCVariableDecl.accept(JCTree.java:828)
at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:603)
at com.sun.tools.javac.comp.Attr.attribStat(Attr.java:648)
at com.sun.tools.javac.comp.Attr.attribStats(Attr.java:664)
at com.sun.tools.javac.comp.Attr.visitLambda(Attr.java:2321)
at com.sun.tools.javac.tree.JCTree$JCLambda.accept(JCTree.java:1590)
at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:603)
at com.sun.tools.javac.comp.DeferredAttr.attribSpeculative(DeferredAttr.java:304)
at com.sun.tools.javac.comp.DeferredAttr$1.complete(DeferredAttr.java:236)
at com.sun.tools.javac.comp.DeferredAttr$DeferredType.check(DeferredAttr.java:203)
at com.sun.tools.javac.comp.DeferredAttr$DeferredType.check(DeferredAttr.java:191)
at com.sun.tools.javac.comp.DeferredAttr$RecoveryDeferredTypeMap.recover(DeferredAttr.java:647)
at com.sun.tools.javac.comp.DeferredAttr$RecoveryDeferredTypeMap.typeOf(DeferredAttr.java:631)
at com.sun.tools.javac.comp.Resolve$7$ResolveDeferredRecoveryMap.typeOf(Resolve.java:2117)
at com.sun.tools.javac.comp.DeferredAttr$DeferredTypeMap.apply(DeferredAttr.java:598)
at com.sun.tools.javac.comp.DeferredAttr$RecoveryDeferredTypeMap.apply(DeferredAttr.java:621)
at com.sun.tools.javac.code.Type.map(Type.java:219)
at com.sun.tools.javac.comp.Resolve$7.getArgumentTypes(Resolve.java:2106)
at com.sun.tools.javac.comp.Resolve.accessInternal(Resolve.java:2025)
at com.sun.tools.javac.comp.Resolve.accessMethod(Resolve.java:2045)
at com.sun.tools.javac.comp.Resolve$BasicLookupHelper.access(Resolve.java:2671)
at com.sun.tools.javac.comp.Resolve$9.access(Resolve.java:2251)
at com.sun.tools.javac.comp.Resolve.lookupMethod(Resolve.java:2906)
at com.sun.tools.javac.comp.Resolve.resolveQualifiedMethod(Resolve.java:2241)
at com.sun.tools.javac.comp.Resolve.resolveQualifiedMethod(Resolve.java:2235)
at com.sun.tools.javac.comp.Attr.selectSym(Attr.java:3259)
at com.sun.tools.javac.comp.Attr.visitSelect(Attr.java:3153)
at com.sun.tools.javac.tree.JCTree$JCFieldAccess.accept(JCTree.java:1863)
at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:603)
at com.sun.tools.javac.comp.Attr.visitApply(Attr.java:1802)
at com.sun.tools.javac.tree.JCTree$JCMethodInvocation.accept(JCTree.java:1440)
at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:603)
at com.sun.tools.javac.comp.Attr.visitSelect(Attr.java:3126)
at com.sun.tools.javac.tree.JCTree$JCFieldAccess.accept(JCTree.java:1863)
at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:603)
at com.sun.tools.javac.comp.Attr.visitApply(Attr.java:1802)
at com.sun.tools.javac.tree.JCTree$JCMethodInvocation.accept(JCTree.java:1440)
at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:603)
at com.sun.tools.javac.comp.Attr.attribExpr(Attr.java:621)
at com.sun.tools.javac.comp.Attr.visitVarDef(Attr.java:1083)
at com.sun.tools.javac.tree.JCTree$JCVariableDecl.accept(JCTree.java:828)
at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:603)
at com.sun.tools.javac.comp.Attr.attribStat(Attr.java:648)
at com.sun.tools.javac.comp.Attr.attribStats(Attr.java:664)
at com.sun.tools.javac.comp.Attr.visitLambda(Attr.java:2351)
at com.sun.tools.javac.tree.JCTree$JCLambda.accept(JCTree.java:1590)
at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:603)
at com.sun.tools.javac.comp.Attr.attribExpr(Attr.java:621)
at com.sun.tools.javac.comp.Attr.visitVarDef(Attr.java:1083)
at com.sun.tools.javac.tree.JCTree$JCVariableDecl.accept(JCTree.java:828)
at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:603)
at com.sun.tools.javac.comp.Attr.attribStat(Attr.java:648)
at com.sun.tools.javac.comp.Attr.attribClassBody(Attr.java:4172)
at com.sun.tools.javac.comp.Attr.attribClass(Attr.java:4080)
at com.sun.tools.javac.comp.Attr.attribClass(Attr.java:4015)
at com.sun.tools.javac.comp.Attr.attrib(Attr.java:3989)
at com.sun.tools.javac.main.JavaCompiler.attribute(JavaCompiler.java:1225)
at com.sun.tools.javac.main.JavaCompiler.compile2(JavaCompiler.java:878)
at com.sun.tools.javac.main.JavaCompiler.compile(JavaCompiler.java:837)
at com.sun.tools.javac.main.Main.compile(Main.java:519)
at com.sun.tools.javac.main.Main.compile(Main.java:376)
at com.sun.tools.javac.main.Main.compile(Main.java:365)
at com.sun.tools.javac.main.Main.compile(Main.java:356)
at com.sun.tools.javac.Main.compile(Main.java:77)
at com.sun.tools.javac.Main.main(Main.java:62)


REPRODUCIBILITY :
This bug can be reproduced always.

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

import java.util.concurrent.Callable;
import java.util.concurrent.Future;
import java.util.stream.StreamSupport;
import java.util.ArrayList;
import java.util.Spliterators;
import java.util.concurrent.ExecutorService;
import java.util.function.Consumer;

import junit.framework.TestCase;

public class EBug2 extends TestCase {

class Pythag {
public int a, b, c;
public Pythag( int a, int b, int c ) {
this.a = a;
this.b = b;
this.c = c;
}
}

//* won't compile in b90
class PythagGenerator extends Spliterators.AbstractSpliterator<Pythag> {
public PythagGenerator() {
super( Long.MAX_VALUE, DISTINCT | IMMUTABLE | NONNULL );
}

private int a = 1;
private int b = 2;
private int c = 3;

// @Override
public boolean tryAdvance( Consumer<? super Pythag> p ) {
/*
while ( a*a + b*b != c*c ) {
a++;
if ( a >= b ) {
a = 1;
b++;
}
if ( b >= c ) {
a = 1;
b = 2;
c++;
}
}
p.accept( new Pythag( a, b, c ) );
return true;
*/
return false;
}
}

Callable<Long> p09 = () -> {
Pythag p = StreamSupport.stream( new PythagGenerator() ).findFirst( p -> p.a + p.b + p.c == 1000 ).orElse( null );

return p.a * p.b * p.c;

/*
for ( int a = 1; a < 333; a++ ) {
for ( int b = a + 1; b < 1000 - a; b++ ) {
int c = 1000 - a - b;
if ( c <= 0 )
break;
if ( a*a + b*b == c*c ) {
return ( long )( a * b * c );
}
}
}
return 0L;
*/
};

private static ExecutorService pool = null;
private static Future<Long> fut = null;
private static ArrayList<Callable<Long>> tasks = new ArrayList<Callable<Long>>();
@Override public void setUp() {
if ( pool == null ) {
pool = Executors.newFixedThreadPool( 5 );
fut = pool.submit( p09 );
pool.shutdown();
}
}

public void testP09() {
assertEquals( 31875000L, fut.get().longValue() );
}

public static void main( String[] args ) {
System.out.print( " pausing for input ... " );
System.in.read();
System.out.println( " running " );
EBug e = new EBug();
e.setUp();
System.out.println( " Problem: " + fut.get().longValue() );
}
}

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

CUSTOMER SUBMITTED WORKAROUND :
Haven't found one.