Compiling the following class crashes javac with a CompilerError:

public class BAD {
    public Object foo() {
// return new Cloneable() {} ; // OK
return new Cloneable(null) {} ; // BAD
    }
}

The backtrace is:

sun.tools.java.CompilerError: stackSize null
        at sun.tools.java.Type.stackSize(Type.java)
        at sun.tools.tree.Context.declare(Context.java)
        at sun.tools.javac.SourceField.check(SourceField.java)
        at sun.tools.javac.SourceClass.checkFields(SourceClass.java)
        at sun.tools.javac.SourceClass.checkInternal(SourceClass.java)
        at sun.tools.javac.SourceClass.checkLocalClass(SourceClass.java)
        at sun.tools.tree.NewInstanceExpression.checkValue(NewInstanceExpression.java)
        at sun.tools.tree.ReturnStatement.check(ReturnStatement.java)
        at sun.tools.tree.Statement.checkBlockStatement(Statement.java)
        at sun.tools.tree.CompoundStatement.check(CompoundStatement.java)
        at sun.tools.tree.Statement.checkMethod(Statement.java)
        at sun.tools.javac.SourceField.check(SourceField.java)
        at sun.tools.javac.SourceClass.checkFields(SourceClass.java)
        at sun.tools.javac.SourceClass.checkInternal(SourceClass.java)
        at sun.tools.javac.SourceClass.check(SourceClass.java)
        at sun.tools.javac.Main.compile(Main.java)
        at sun.tools.javac.Main.main(Main.java)

william.maddox@Eng 1997-07-30