The following code that used to execute fine, throws ClassCastException after JDK-8294960:

import java.util.function.Predicate;
public class Test {
    public static void main(String[] args) {
        doTest(Test::predicate, 'x');
    }
    public static boolean doTest(Predicate<Character> predicate, char c) {
        return predicate.test(c);
    }
    public static boolean predicate(int c) {
        return '0' <= c && c <= '9';
    }
}

Exception in thread "main" java.lang.ClassCastException: class java.lang.Character cannot be cast to class java.lang.Number (java.lang.Character and java.lang.Number are in module java.base of loader 'bootstrap')
        at Test.doTest(Test.java:10)
        at Test.main(Test.java:6)