gcc/testsuite/gdc.test/fail_compilation/fail188.d

/*
TEST_OUTPUT:
---
fail_compilation/fail188.d(15): Error: function `fail188.Derived.foo` cannot override `final` function `fail188.Base.foo`
---
*/

class Base
{
    final void foo() {}
}

class Derived : Base
{
    void foo() {}
}