RFR: JDK-8277451: java.lang.reflect.Field::set on static field with invalid argument type should throw IAE [v2]

[Alan Bateman]

On Mon, 22 Nov 2021 20:01:50 GMT, Mandy Chung <mchung at openjdk.org> wrote:

>> java.lang.reflect.Field::set on static field with invalid argument type should throw IAE.  But this regression is introduced by JEP 416 throwing NPE instead.
>> 
>> `ensureObj` is called as the first check of the `Field::set` method to ensure the receiver object is checked first before the argument.   For a Field instance with write-access, the method handle invocation will check the receiver.  Therefore for `Field::setXXX` methods to set a primitive value, `ensureObj` is only called if it's a read-only Field instance to ensure IllegalArgumentException is thrown first before IllegalAccessException to keep the existing behavior to avoid duplicated receiver check.
>
> Mandy Chung has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Improve the exception message when the type is not available

Marked as reviewed by alanb (Reviewer).

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PR: https://git.openjdk.java.net/jdk/pull/6490