Introducing method on "instanceof" caused compile error

Apache NetBeans version

Apache NetBeans 21

What happened

Using "introduce method" on "instanceof" caused compile error in output program.

Language / Project Type / NetBeans Component

Java Maven Project Java Application

How to reproduce

Input program:

class X {
        private void foo(Object o) {
            if (o instanceof X x) { // select the entire o instanceof X x
                System.out.println(x.toString());
                x.foo(null);
            }

        }
    }

Steps: Select “o instanceof X x” Refactor -> Introduce -> Method

Actual output:

class X {
        private void foo(Object o) {
                if (extract1(o)) { // select the entire o instanceof X x
                        System.out.println(x.toString());
                        x.foo(null);
                }

        }

        private boolean extract1(Object o) {
            return o instanceof X x;
        }
    }

Expected result: Prevent from introducing method on "instanceof"

Did this work correctly in an earlier version?

No / Don't know

Operating System

Windows 11

JDK

22.0.1

Apache NetBeans packaging

Apache NetBeans provided installer

Anything else

No response

apache / netbeans

Introducing method on "instanceof" caused compile error #7428