Cannot read fields of java.lang.reflect.Field class

ADDITIONAL SYSTEM INFORMATION :
Windows 10
Java 12 early #27

A DESCRIPTION OF THE PROBLEM :
Calling Field.class.getDeclaredField("modifiers") throws an exception but it exists.
It's usually used to update private static fields (like in tests in my case) like explained in http://java-performance.info/updating-final-and-static-final-fields/ : you mark the field accessible and you change its modifier value

REGRESSION : Last worked in version 11.0.1

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Simply call Field.class.getDeclaredField("modifiers")

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
You have a Field object
ACTUAL -
An exception is thrown

---------- BEGIN SOURCE ----------
import java.lang.reflect.Field;

class Scratch {
    public static void main(String... args) throws Exception {
        Field modifiers = Field.class.getDeclaredField("modifiers");
        System.out.println("It's working: " + modifiers);
    }
}

---------- END SOURCE ----------

FREQUENCY : always