RFR: JDK-8077265 Modify assert to help debug JDK-8068448

[Thomas Schatzl]

Hi,

On Tue, 2015-04-14 at 11:30 -0400, Eric Caspole wrote:
> Hi, here's a new webrev with the new assert in psOldGen as a function
> -
> I capture only the covered_region in a local as it directly relates to
> the problem.
> 
>  http://cr.openjdk.java.net/~ecaspole/JDK-8077265/02/webrev/

looks good to me.

Thomas