The followin exception was thrown while coppilation of the Test1.java(see below). winxp and solaris platforms, java 6 and 7.
------------------------------------OutPut----------------------------------------------
Information:An exception has occurred in the compiler (1.6.0). 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.
Information:java.lang.NullPointerException
Information: at com.sun.tools.javac.comp.TransTypes.retype(TransTypes.java:135)
Information: at com.sun.tools.javac.comp.TransTypes.visitApply(TransTypes.java:566)
Information: at com.sun.tools.javac.tree.JCTree$JCMethodInvocation.accept(JCTree.java:1210)
Information: at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:44)
Information: at com.sun.tools.javac.comp.TransTypes.translate(TransTypes.java:398)
Information: at com.sun.tools.javac.comp.TransTypes.visitExec(TransTypes.java:529)
Information: at com.sun.tools.javac.tree.JCTree$JCExpressionStatement.accept(JCTree.java:1074)
Information: at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:56)
Information: at com.sun.tools.javac.tree.TreeTranslator.visitBlock(TreeTranslator.java:146)
Information: at com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:739)
Information: at com.sun.tools.javac.comp.TransTypes.visitMethodDef(TransTypes.java:432)
Information: at com.sun.tools.javac.tree.JCTree$JCMethodDecl.accept(JCTree.java:639)
Information: at com.sun.tools.javac.tree.TreeTranslator.visitClassDef(TreeTranslator.java:120)
Information: at com.sun.tools.javac.comp.TransTypes.translateClass(TransTypes.java:742)
Information: at com.sun.tools.javac.comp.TransTypes.visitClassDef(TransTypes.java:419)
Information: at com.sun.tools.javac.tree.JCTree$JCClassDecl.accept(JCTree.java:575)
Information: at com.sun.tools.javac.comp.TransTypes.translateTopLevelClass(TransTypes.java:765)
Information: at com.sun.tools.javac.main.JavaCompiler.desugar(JavaCompiler.java:1182)
Information: at com.sun.tools.javac.main.JavaCompiler.desugar(JavaCompiler.java:1118)
Information: at com.sun.tools.javac.main.JavaCompiler.compile2(JavaCompiler.java:765)
Information: at com.sun.tools.javac.main.JavaCompiler.compile(JavaCompiler.java:730)
Information: at com.sun.tools.javac.main.Main.compile(Main.java:353)
Information: at com.sun.tools.javac.main.Main.compile(Main.java:279)
Information: at com.sun.tools.javac.main.Main.compile(Main.java:270)
Information: at com.sun.tools.javac.Main.compile(Main.java:69)
Information: at com.sun.tools.javac.Main.main(Main.java:54)
Information: at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
Information: at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
Information: at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
Information: at java.lang.reflect.Method.invoke(Method.java:597)
Information: at com.intellij.rt.compiler.JavacRunner.main(JavacRunner.java:56)
Information:Compilation completed with 1 error and 0 warnings
Information:1 error
Information:0 warnings
Error:Compiler internal error. Process terminated with exit code 4

------------------------------Test1.java--------------------------------
class A{ public void a(){}}
class B extends A{ public void b(){}}
interface I{ void i();}
class E extends B implements I{ public void i(){};}

class C<W extends B & I, T extends W>{
     public T fieldT;
}

public class Test1 {
    static void method(C<? extends I, ? extends E> arg){ //FAIL
// // (C<? extends I, ? extends B> arg){ // OK
        arg.fieldT.a();
    }
}