Product Version: NetBeans IDE Dev (Build 20080310023444)
Java: 1.6.0_04; Java HotSpot(TM) Client VM 10.0-b19
System: SunOS version 5.11 running on x86; UTF-8; en_US (nb)

The interface cannot be move to outer level. Strange errors are shown in the dialog and the refactoring cannot continue.

Steps to reproduce:
1) have two classes:
public class OuterClass {
        
    public Inner1 getInner() {
        return new Inner1();
    }
    
    public class Inner1{
    }
        
    public interface InnerIface {
        void method1();
    }       
}

public class User implements OuterClass.InnerIface {

    public User() {
        OuterClass out = new OuterClass();
        OuterClass.Inner1 in1 =  out.getInner();        
    }    
    
    public void method1() {
    }    
}


2) call move inner to outer on InnerIface

-> dialog contains this errors:
Cannot refactor "out.getInner". Use "Declare Field" option.
Cannot refactor "OuterClass.Inner1". Use "Declare Field" option.