On Tue, 16 Jun 2026 05:29:02 GMT, Jaikiran Pai <[email protected]> wrote:

>> David Simms has updated the pull request with a new target base due to a 
>> merge or a rebase. The pull request now contains 2798 commits:
>> 
>>  - Merge remote-tracking branch 'valhalla/lworld' into 
>> jep401_sub_review_8317279
>>  - 8386239: [lworld] Update jdk/java/util/Arrays/ArraysEqCmpTest.java
>>    
>>    Reviewed-by: liach
>>  - 8386242: [lworld] Simplify and clarify StrictProcessor
>>    
>>    Reviewed-by: dsimms
>>  - 8386140: [lworld] FieldReflector using wrong Class argument
>>    
>>    Reviewed-by: alanb, dsimms
>>  - 8386216: [lworld] Rollback meaningless diff in EventClassBuilder
>>    
>>    Reviewed-by: dsimms
>>  - 8385170: [lworld] Serialization spec needs to allow abstract value 
>> classes like Number
>>    
>>    Reviewed-by: liach
>>  - 8385980: [lworld] Standardize pattern for preview value class generation
>>    
>>    Reviewed-by: liach
>>  - 8386086: [lworld] 
>> sun/jvmstat/monitor/MonitoredVm/MonitorVmStartTerminate.java should be 
>> removed from problem list
>>    
>>    Reviewed-by: liach, dcubed
>>  - Merge
>>    
>>    Merge jdk-28+1
>>  - 8386090: [lworld] Redundant test changes in lworld versus mainline
>>    
>>    Reviewed-by: vromero
>>  - ... and 2788 more: https://git.openjdk.org/jdk/compare/92298786...4d6d2888
>
> src/java.base/share/classes/java/lang/ref/Cleaner.java line 221:
> 
>> 219:      * @param action a {@code Runnable} to invoke when the object 
>> becomes phantom reachable
>> 220:      * @return a {@code Cleanable} instance
>> 221:      * @throws IdentityException if the object is not an
> 
> Nit - perhaps reword it as `if {@code obj} is not an ...`?

Infact, should the newly added `@throws` specification state that the 
`IdentityException` is only thrown when value objects preview is enabled?
Furthermore, should the newly introduced:


Objects.requireIdentity(obj, "obj");

instead be invoked only if `PreviewFeatures.isEnabled()`? I realize that deep 
within the call of `Objects.requireIdentity`, the preview enabled check does 
get exercised and this call returns normally when preview is disabled. But it 
might be more clear here at the call site to use a 
`PreviewFeatures.isEnabled()` before calling `Objects.requireIdentity()`.

-------------

PR Review Comment: https://git.openjdk.org/jdk/pull/31123#discussion_r3418360701

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