JDK 1.8.0_101-b13 fails to infer types (partial example from Javaslang source)

HashMap_failing.java

public class HashMap<K, V> implements Map<K, V> {

    public static <K, V> HashMap<K, V> ofEntries(Iterable<? extends Tuple2<? extends K, ? extends V>> entries) {
        return ...
    }
    
    @Override
    public HashMap<K, V> distinctBy(Comparator<? super Tuple2<K, V>> comparator) {
        // IntelliJ IDEA shows no error, JDK fails to compile:
        //   "incompatible types: cannot infer type-variable(s) K,V,M"
        return Maps.distinctBy(this, HashMap::createFromEntries, comparator);
    }
    
    private static <K, V> HashMap<K, V> createFromEntries(Iterable<Tuple2<K, V>> tuples) {
        return HashMap.ofEntries(tuples);
    }
}

HashMap_ok.java

public class HashMap<K, V> implements Map<K, V> {

    public static <K, V> HashMap<K, V> ofEntries(Iterable<? extends Tuple2<? extends K, ? extends V>> entries) {
        return ...
    }
    
    @Override
    public HashMap<K, V> distinctBy(Comparator<? super Tuple2<K, V>> comparator) {
        // works fine with both, IntelliJ IDEA and JDK
        return Maps.distinctBy(this, this::createFromEntries, comparator);
    }
    
    private HashMap<K, V> createFromEntries(Iterable<Tuple2<K, V>> tuples) {
        return HashMap.ofEntries(tuples);
    }
}

Maps.java

final class Maps {

    static <K, V, M extends Map<K, V>> M distinctBy(M map, OfEntries<K, V, M> ofEntries,
                                                    Comparator<? super Tuple2<K, V>> comparator) {
        Objects.requireNonNull(comparator, "comparator is null");
        return ofEntries.apply(map.iterator().distinctBy(comparator));
    }
    
    @FunctionalInterface
    interface OfEntries<K, V, M extends Map<K, V>> extends Function<Iterable<Tuple2<K, V>>, M> {
    }
    
}