System.out.println is creating error with @Immutable type and @Readonly type

[Shreyas-BS]

Issue Description

System.out.println is raising error with @immutable type and @readonly type stating it requires @mutable object and not an object of type @immutable or @readonly

How to reproduce

Create an object of type @immutable and try to print it using System.out.println

Screen Shot / Recording

Minimum test case code

import qual.Immutable;

@Immutable
public final class Demo {
    Demo test = new Demo();

    public void printText() {
        System.out.println(test);
    }
    
}

[aosen-xiong]

@Shreyas-BS Thanks for your report, can you also minimize the example and paste the code here?