Patch for JDK-8142882: rebinding of a DirectMethodHandle

[John Rose]

Yes, it is safe to remove those overrides from DMH.
You can count me as a reviewer.
I like the test; it should be forward-ported to 9
if we don't already have something like it.
— John

> On Nov 12, 2015, at 11:46 AM, Chuck Rasbold <rasbold at google.com> wrote:
> 
> Proposed fix for: https://bugs.openjdk.java.net/browse/JDK-8142882
> 
> http://cr.openjdk.java.net/~rasbold/8142882/webrev.00/
> 
> Don't pre-dispatch the receiver of a DirectMethodHandle, as it may allow a
> protected method to be accessed.
> 
> This fix is a subset of the change for JDK-8050166
> <https://bugs.openjdk.java.net/browse/JDK-8050166>, which is already in
> jdk8 and jdk9.
> 
> The change causes the an NPE to be thrown when a protected MethodHandle is
> called via invoke().
> An additional backport of JDK-8016839
> <https://bugs.openjdk.java.net/browse/JDK-8016839> is needed, if it is
> desired to that a proper IllegalAccessError is thrown instead of an NPE, as
> happens with jdk8 / jdk9.