Description:
Following test code contains a class and interface having same method signature. When Wildcard parameterized Types of those reference types are used as bounds for a TypeParameter, the compiler crashes.

<code>
class Class1<E> {
    public E met1(){
        return null;
    }
}
interface I1<E>{
    public E met1();
}
class Class2 <T extends Class1 <?> & I1 >{
}
</code>


Compilation result is :
<output>

Following is the Error message:
An exception has occurred in the compiler (1.7.0-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.AssertionError: isSubtype 15
        at com.sun.tools.javac.code.Types$5.visitType(Types.java:361)
        at com.sun.tools.javac.code.Types$5.visitType(Types.java:342)
        at com.sun.tools.javac.code.Types$DefaultTypeVisitor.visitWildcardType(Types.java:3185)
        at com.sun.tools.javac.code.Type$WildcardType.accept(Type.java:430)
        at com.sun.tools.javac.code.Types$DefaultTypeVisitor.visit(Types.java:3183)
        at com.sun.tools.javac.code.Types.isSubtype(Types.java:338)
        at com.sun.tools.javac.code.Types.isSubtype(Types.java:322)
        at com.sun.tools.javac.code.Types.isSubtypeUnchecked(Types.java:302)
        at com.sun.tools.javac.code.Types.isConvertible(Types.java:271)
        at com.sun.tools.javac.code.Types.isAssignable(Types.java:1489)
        at com.sun.tools.javac.code.Types.covariantReturnType(Types.java:2699)
        at com.sun.tools.javac.code.Types.returnTypeSubstitutable(Types.java:2683)
        at com.sun.tools.javac.comp.Check.checkOverride(Check.java:1135)
        at com.sun.tools.javac.comp.Check.checkImplementations(Check.java:1574)
        at com.sun.tools.javac.comp.Check.checkImplementations(Check.java:1549)
        at com.sun.tools.javac.comp.Attr.attribClassBody(Attr.java:2736)
        at com.sun.tools.javac.comp.Attr.attribClass(Attr.java:2666)
        at com.sun.tools.javac.comp.Attr.attribClass(Attr.java:2602)
        at com.sun.tools.javac.comp.Attr.attribBounds(Attr.java:480)
        at com.sun.tools.javac.comp.Attr.attribClassBody(Attr.java:2690)
        at com.sun.tools.javac.comp.Attr.attribClass(Attr.java:2666)
        at com.sun.tools.javac.comp.Attr.attribClass(Attr.java:2602)
        at com.sun.tools.javac.main.JavaCompiler.attribute(JavaCompiler.java:1050)
        at com.sun.tools.javac.main.JavaCompiler.compile2(JavaCompiler.java:779)
        at com.sun.tools.javac.main.JavaCompiler.compile(JavaCompiler.java:744)
        at com.sun.tools.javac.main.Main.compile(Main.java:386)
        at com.sun.tools.javac.main.Main.compile(Main.java:312)
        at com.sun.tools.javac.main.Main.compile(Main.java:303)
        at com.sun.tools.javac.Main.compile(Main.java:82)
        at com.sun.tools.javac.Main.main(Main.java:67)
</output>
<version>
bash-3.00$ /net/sqindia/export/disk09/jdk/7/latest/binaries/solsparc/bin/java -version
java version "1.7.0-ea"
Java(TM) SE Runtime Environment (build 1.7.0-ea-b24)
Java HotSpot(TM) Client VM (build 12.0-b01, mixed mode)

bash-3.00$ uname -a
SunOS hrajan 5.10 Generic_120011-14 sun4u sparc SUNW,Ultra-60

*** (#1 of 1): 2008-01-17 19:28:00 IST ###@###.###