8142493: Utility methods to check indexes and ranges doesn't specify behavior when function produces null

[Mandy Chung]

Looks good.
Mandy

> On Nov 12, 2015, at 3:19 AM, Paul Sandoz <paul.sandoz at oracle.com> wrote:
> 
> Hi,
> 
> Please review:
> 
>  http://cr.openjdk.java.net/~psandoz/jdk9/JDK-8142493-checkIndex-function-return-null/webrev/ <http://cr.openjdk.java.net/~psandoz/jdk9/JDK-8142493-checkIndex-function-return-null/webrev/>
> 
> This catches some edge cases for the exception mapping function passed to the Objects::checkIndex* methods, specifically if the function returns null or throws an exception.
> 
> Paul.