FULL PRODUCT VERSION :
java version "1.8.0_74"
Java(TM) SE Runtime Environment (build 1.8.0_74-b02)
Java HotSpot(TM) 64-Bit Server VM (build 25.74-b02, mixed mode)

ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows [Version 6.1.7601]

A DESCRIPTION OF THE PROBLEM :
The problem seems to manifest itself while using a public method reference of a package-private class through a public subclass from another package.

Please consider the following two classes which reside in "package1":

-----------
Foo.java
-----------
package package1;

abstract class Foo {

public String getFoo() {
return "foo";
}

}

-----------
Bar.java
-----------
package package1;

public class Bar extends Foo {

public String getBar() {
return "bar";
}

}

Now please consider the following class which reside in "package2":

--------------------
Something.java
--------------------

package package2;

import java.util.stream.Stream;

import package1.Bar;

public class Something {

public static void main(String[] args) {

        System.out.println(new Bar().getFoo());
        // "foo"
        
        Stream.of(new Bar()).map(Bar::getFoo).forEach(System.out::println);
        // IllegalAccessError

    }

}

As you can see from the comments in the code:
- directly accessing the public method "getFoo" of the package-private class "Foo" through
its subclass "Bar" from the "package2" does not result in any error;
- using a method reference of the public method "getFoo" of the package-private class "Foo" through its subclass "Bar" in the "package2" results in an IllegalAccessError.

The problem seems to be very similar to the following:
https://bugs.openjdk.java.net/browse/JDK-8029707


REPRODUCIBILITY :
This bug can be reproduced always.