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

[Maurizio Cimadamore]

Thanks for the reoprt - I have a fix for this; I will push it later today.

Maurizio

On 01/12/11 01:16, 苦狐 wrote:
> 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
>