RFR 8234423 : Modifying ArrayList.subList().subList() resets modCount of subList

[Ivan Gerasimov]

Re-sending the request with the correct Subject line - the bug is not 
(only) about the iterator.


On 11/20/19 10:11 PM, Ivan Gerasimov wrote:
> Hello!
>
> When a sublist of a sublist of an ArrayList is created, its modCount 
> is initialized from the ArrayList root, and not from its immediate 
> parent.
>
> This means that modifying that 2nd level sublist will reset modCounts 
> of the entire chain up to the root, and consequently the 1st level 
> sublist won't detect concurrent modification done to the ArrayList root.
>
> Along with the fix, handling of modCount is slightly improved in a few 
> other places.
>
> Would you please help review the fix?
>
> BUGURL: https://bugs.openjdk.java.net/browse/JDK-8234423
> WEBREV: http://cr.openjdk.java.net/~igerasim/8234423/00/webrev/
>
-- 
With kind regards,
Ivan Gerasimov