RFR: 8361909: ConstantPoolBuilder::loadableConstantEntry and constantValueEntry should throw NPE

[Adam Sotona]

On Thu, 10 Jul 2025 22:32:45 GMT, Chen Liang <liach at openjdk.org> wrote:

> Currently, the aforementioned two methods do not throw NPE upon null input, but throw IAE.
> 
> This behavior is bad for composition: `bsmEntry` actually throws IAE for nested null in the argument list/array, and other APIs are similarly affected.
> 
> Given this domino effect, I think the best way is to fix the API itself to correctly throw NPE instead. A small CSR is opened to record this change.

Looks reasonable.

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Marked as reviewed by asotona (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/26257#pullrequestreview-3010505438