There is no compile-time error when method reference with super and abstract is used.
Testcase example with AbstractMethodError during runtime:

interface SAM {
    int m();
}

abstract class Tester {
    abstract int foo() ;
}

abstract class MyTester extends Tester {
    abstract int foo() ;
    public int test() {
        SAM s = super::foo;
        s.m();
        return 0;
    }
}

public class lmbd04201m0 {
    public static void main(String argv[]) {
        System.out.println(new MyTester() {
            int foo() { return 0; }
        }.test());
    }
}

Spec:
It is a compile-time error if the method reference is of the form super :: NonWildTypeArgumentsopt Identifier and the compile-time declaration is abstract.

It is a compile-time error if the method reference is of the form TypeName . super :: NonWildTypeArgumentsopt Identifier, and either of the following are true:
    * The compile-time declaration is abstract.

In some cases java.lang.ClassFormatError is reported during compilation. Example:
interface SAM {
    Object m(int i);
}

interface Tester {
    abstract int foo(int i) ;
}

interface MyTester extends Tester {
    abstract int foo(int i) ;
    default public int test() {
        SAM s = Tester.super::foo;
        s.m(3);
        return 0;
    }
}

The following JCK test will be integrated soon:
lang/LMBD/lmbd042/lmbd04201m1/lmbd04201m1.html
lang/LMBD/lmbd042/lmbd04201m0/lmbd04201m0.html
lang/LMBD/lmbd042/lmbd04201m2/lmbd04201m2.html
lang/LMBD/lmbd043/lmbd04301m0/lmbd04301m0.html
lang/LMBD/lmbd043/lmbd04301m2/lmbd04301m2.html
lang/LMBD/lmbd043/lmbd04301m3/lmbd04301m3.html
lang/LMBD/lmbd043/lmbd04302m1/lmbd04302m1.html
lang/LMBD/lmbd043/lmbd04302m2/lmbd04302m2.html
lang/LMBD/lmbd043/lmbd04303m1/lmbd04303m1.html