test/langtools/tools/javac/generics/inference/8156954/T8156954.java

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/**
 * @test
 * @bug 8156954
 * @summary javac incorrectly complains of incompatible types
 * @compile T8156954.java
 */
import java.util.function.Function;

class T8156954 {

    <T, R> void m1(Function<R, T> f1, Function<T, R> f2, R r) { }
    <T, R> void m2(Function<T, R> f1, Function<R, T> f2, R r) { }

    void m(Integer intValue) {
        m1(o -> o, o -> o , intValue);
        m2(o -> o, o -> o , intValue);
    }
}