TestInfer.java

// Test case for issue #238: https://github.com/typetools/checker-framework/issues/238

import java.util.ArrayList;
import java.util.List;

class TestInfer1 {
    <T> T getValue(List<T> l) {
        return l.get(0);
    }

    void bar(Object o) {}

    void foo() {
        List<?> ls = new ArrayList<>();
        bar(getValue(ls));
    }
}

class TestInfer2 {
    <T extends String> T getValue(List<T> l) {
        return l.get(0);
    }

    void bar(String o) {}

    void foo() {
        List<? extends String> ls = new ArrayList<>();
        bar(getValue(ls));
    }
}