+= operator cause internal error on Android

IDE: VS 2015
Version: 8.4.96.2019
Target (If relevant): Android + C#
Description:

public static class TestClass {

    public static void test(params double[] delta) {
        var value = new double[delta.length];
        for (int i = value.length - 1; i >= 0; --i) {

            // (E0) Internal error: Object reference not set to an instance of an object.
            value[i] += delta[i];

            // value[i] = value[i] + delta[i]; // ok
        }
    }
}

Thanks, logged as bugs://75710

bugs://75710 got closed with status fixed.

Logged as bugs://i63671.

bugs://i63671 was closed as fixed.