bumped into a compiler NPE when replaced lambda with an anonymous class

[Dmitry Bessonov]

Attempt to compile with b77 a minimized (to some extent) code:

--------------------------------------------------------------
public class CompilerError {

     public static void main(String[] args) {
         Bar bar = a -> a.aMethod((ClassB) () -> new ClassB() {
             public void bMethod() {
             }
         });
     }

     public static interface Bar {
         void barMethod(ClassA a);
     }

     public interface ClassA {
         public void aMethod(Object t);
     }

     public interface ClassB {
         public void bMethod();
     }

}
--------------------------------------------------------------

leads to

java.lang.NullPointerException
         at com.sun.tools.javac.jvm.Code.emitop0(Code.java:538)
         at com.sun.tools.javac.jvm.Items$SelfItem.load(Items.java:367)
         at com.sun.tools.javac.jvm.Gen.genArgs(Gen.java:912)
         at com.sun.tools.javac.jvm.Gen.visitNewClass(Gen.java:1831)
         at 
com.sun.tools.javac.tree.JCTree$JCNewClass.accept(JCTree.java:1491)
         at com.sun.tools.javac.jvm.Gen.genExpr(Gen.java:893)
         at com.sun.tools.javac.jvm.Gen.visitExec(Gen.java:1697)
         at 
com.sun.tools.javac.tree.JCTree$JCExpressionStatement.accept(JCTree.java:1271)
         at com.sun.tools.javac.jvm.Gen.genDef(Gen.java:683)
         at com.sun.tools.javac.jvm.Gen.genStat(Gen.java:718)
         at com.sun.tools.javac.jvm.Gen.genStat(Gen.java:704)
         at com.sun.tools.javac.jvm.Gen.genStats(Gen.java:755)
         at com.sun.tools.javac.jvm.Gen.visitBlock(Gen.java:1093)
         at com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:884)
         at com.sun.tools.javac.jvm.Gen.genDef(Gen.java:683)
         at com.sun.tools.javac.jvm.Gen.genStat(Gen.java:718)
         at com.sun.tools.javac.jvm.Gen.genMethod(Gen.java:968)
         at com.sun.tools.javac.jvm.Gen.visitMethodDef(Gen.java:941)
         at 
com.sun.tools.javac.tree.JCTree$JCMethodDecl.accept(JCTree.java:771)
         at com.sun.tools.javac.jvm.Gen.genDef(Gen.java:683)
         at com.sun.tools.javac.jvm.Gen.genClass(Gen.java:2355)
         at 
com.sun.tools.javac.main.JavaCompiler.genCode(JavaCompiler.java:751)
         at 
com.sun.tools.javac.main.JavaCompiler.generate(JavaCompiler.java:1545)
         at 
com.sun.tools.javac.main.JavaCompiler.generate(JavaCompiler.java:1509)
         at 
com.sun.tools.javac.main.JavaCompiler.compile2(JavaCompiler.java:907)
         at 
com.sun.tools.javac.main.JavaCompiler.compile(JavaCompiler.java:866)
         at com.sun.tools.javac.main.Main.compile(Main.java:505)
         at com.sun.tools.javac.main.Main.compile(Main.java:365)
         at com.sun.tools.javac.main.Main.compile(Main.java:354)
         at com.sun.tools.javac.main.Main.compile(Main.java:345)
         at com.sun.tools.javac.Main.compile(Main.java:76)
         at com.sun.tools.javac.Main.main(Main.java:61)


-Dmitry