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

[Roger Riggs]

Hi Ivan,

Happy New Year!

This change looks fine.

Roger


On 11/23/19 2:30 AM, Ivan Gerasimov wrote:
> 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/
>>