Given the following (indirectly compiled in such a way to avoid errors):

interface J { int m(); }
interface I extends J { default int m() { return J.super.m(); } }
class C implements I {}

C c = new C(); c.m(); // expected: AME; actual: ICCE

An AbstractMethodError is expected but due to recent changes in Hotspot for the support of private methods this has changed to an IncompatibleClassChangeError.