IllegalAccessError for package-private super-interface

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package test1;
interface Foo {
   public void foo();
}
public interface Bar extends Foo {
   public void bar();
}

and Scala

package test2
class Baz(x: Bar) {
  x.foo
}

Scalac generates bytecode referencing Foo.foo instead of the most specific Bar.foo, which results in an IllegalAccessError at runtime.

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Imported From: https://issues.scala-lang.org/browse/SI-1430?orig=1 Reporter: @dragos

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Commit Message Bot (anonymous) said: (extempore in r26078) Fix for erroneous bytecode generation.

A remedy for an IllegalAccessError where generated bytecode referred to an inaccessible type. Closes #1430.

Bonus materials:

• tore out all the invokedynamic support. The shipped jdk7 implementation shows limited resemblance to the one this was written against; the code mostly serves to distract. (I think I could get invokedynamic working pretty quickly, except that it would mean having a codebase for java7 and one for 5-6, which is not a yak I wish to shave today.)

• gave NullClass and NothingClass objects of their own, which allowed a nice polymorphic simplification of isSubClass, plus a couple other streamlinings.

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@Blaisorblade said: In the above example, it's intended that Bar extends Foo, isn't it? I'm asking because this is related to #7253.

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@paulp said: Oh, yes, indeed it makes no sense without Bar extending Foo.

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@paulp said: I updated it.