javac throws AssertionError when it compiles the program using Generics(Void) to ReturnType and MethodReference.

[苦狐]

Hi.

javac(version-1.8.0-ea(lambda-8-b1314-windows-x64-10_nov_2011)) throws
AssertionError when it compiles the program using Generics(Void) to
ReturnType and MethodReference.

This is the test case.

// vvvvvvvvvvvvv Code vvvvvvvvvvvvv

import java.io.PrintStream;

public class Main
{
    interface Functional
    {
        public void invoke();
    }

    interface Functionl0<RET>
    {
        public RET invoke();
    }

    interface Functional1<RET, ARG1>
    {
        public RET invoke(ARG1 arg1);
    }

    public static void staticTest_void()
    {
        System.out.println("HelloWorld");
    }

    public void test_void()
    {
        System.out.println("HelloWorld");
    }

    public static void main(String[] args)
    {
        Functional                       f0 = () ->
System.out.println("HelloWorld"); // OK
        Functional                       f1 =
Main#staticTest_void();                 // OK

        Functional0<Void>                f2 = () ->
System.out.println("HelloWorld"); // OK
        Functional0<Void>                f3 =
Main#staticTest_void;                   // throws AssertionError
        Functional0<Void>                f4 = () ->
Main.staticTest_void();           // OK

        Functional1<Void, String>        f5 = s ->
System.out.println(s);             // OK
        Functional1<Void, String>        f6 =
System.out#println;                     // throws AssertionError
        Functional1<PrintStream, String> f7 =
System.out#printf;                      // OK

        Functional1<Void, Main>          f8 =
Main#test_void;                         // throws AssertionError

        Functional                       f9 = new
Main()#test_void;                   // OK
        Functional0<Void>                f10 = new
Main()#test_void;                  // throws AssertionError
    }
}

// ^^^^^^^^^^^^^ Code ^^^^^^^^^^^^^

This problem is like "Javac crashes when SAM converting method reference".(
http://mail.openjdk.java.net/pipermail/lambda-dev/2011-November/004185.html)
And it was fixed by "hg: lambda/lambda/langtools: Bug fixes".(
http://mail.openjdk.java.net/pipermail/lambda-dev/2011-November/004252.html)
So this problem might already be fixed together with that.
Please check this.

This is the Message from javac, and the StackTrace.

==========================================================================================
コンパイラで例外が発生しました(1.8.0-ea)。Bug Paradeに同じバグが登録されていない
ことをご確認の上、Java Developer Connection(http://java.sun.com/webapps/bugrepor
t)でバグの登録をお願いいたします。レポートには、そのプログラムと下記の診断内容を
含めてください。ご協力ありがとうございます。
java.lang.AssertionError
        at com.sun.tools.javac.jvm.Items$Item.load(Items.java:206)
        at com.sun.tools.javac.jvm.Items$Item.coerce(Items.java:254)
        at com.sun.tools.javac.jvm.Items$Item.coerce(Items.java:273)
        at com.sun.tools.javac.jvm.Gen.genExpr(Gen.java:844)
        at com.sun.tools.javac.jvm.Gen.visitReturn(Gen.java:1669)
        at com.sun.tools.javac.tree.JCTree$JCReturn.accept(JCTree.java:1266)
        at com.sun.tools.javac.jvm.Gen.genDef(Gen.java:689)
        at com.sun.tools.javac.jvm.Gen.genStat(Gen.java:724)
        at com.sun.tools.javac.jvm.Gen.genStat(Gen.java:710)
        at com.sun.tools.javac.jvm.Gen.genStats(Gen.java:761)
        at com.sun.tools.javac.jvm.Gen.visitBlock(Gen.java:1040)
        at com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:792)
        at com.sun.tools.javac.jvm.Gen.genDef(Gen.java:689)
        at com.sun.tools.javac.jvm.Gen.genStat(Gen.java:724)
        at com.sun.tools.javac.jvm.Gen.genMethod(Gen.java:918)
        at com.sun.tools.javac.jvm.Gen.visitMethodDef(Gen.java:890)
        at
com.sun.tools.javac.tree.JCTree$JCMethodDecl.accept(JCTree.java:676)
        at com.sun.tools.javac.jvm.Gen.genDef(Gen.java:689)
        at com.sun.tools.javac.jvm.Gen.genClass(Gen.java:2256)
        at
com.sun.tools.javac.main.JavaCompiler.genCode(JavaCompiler.java:727)
        at
com.sun.tools.javac.main.JavaCompiler.generate(JavaCompiler.java:1466)
        at
com.sun.tools.javac.main.JavaCompiler.generate(JavaCompiler.java:1434)
        at
com.sun.tools.javac.main.JavaCompiler.compile2(JavaCompiler.java:885)
        at
com.sun.tools.javac.main.JavaCompiler.compile(JavaCompiler.java:844)
        at com.sun.tools.javac.main.Main.compile(Main.java:430)
        at com.sun.tools.javac.main.Main.compile(Main.java:344)
        at com.sun.tools.javac.main.Main.compile(Main.java:335)
        at com.sun.tools.javac.Main.compile(Main.java:76)
        at com.sun.tools.javac.Main.main(Main.java:61)
==========================================================================================

Thanks.
bitter_fox