File: Issue953b.java

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// Test case for issue 953
// https://github.com/typetools/checker-framework/issues/953
// The signture of MyStream#collect is slightly different than the one in Issue953.java

import java.util.List;

public class Issue953b {
    class MyCollector<A, B, C> {}

    class MyStream<E> {
        <F, G> F collect(MyCollector<? extends E, G, F> param) {
            throw new RuntimeException();
        }
    }

    public static void test(MyStream<Integer> y) {
        // Type argument inference fails, so a checker may report a type checking error.
        @SuppressWarnings("")
        List<Integer> counts = y.collect(toList());
    }

    static <H> MyCollector<H, ?, List<H>> toList() {
        throw new RuntimeException();
    }
}