Review Request JDK-8177844: Ensure non-upgradeable modules cannot be upgraded even with --patch-module

[Alan Bateman]

On 08/04/2017 06:50, Mandy Chung wrote:

> http://cr.openjdk.java.net/~mchung/jdk9/webrevs/8177844/webrev.01/
>
> This fixes -—patch-module to do hash checking on the module being patched
> so that it will ensure that a non-upgradeable module remains not upgradeable.
>
>
The comment at L523 needs updating too, otherwise looks good.

Given that this can't be pushed to jdk9/dev until the issue deploying 
Graal is fixed then I think we should just push this fix to jake and 
move on. It will go into jdk9/dev with the next update (which I hope 
will be the last update).

-Alan