On Thu, 10 Oct 2024 19:13:01 GMT, Chen Liang <li...@openjdk.org> wrote:

> Please review this patch that adds a test by @nizarbenalla to perform null 
> checks across the ClassFile API. This is an updated version of #20556 that 
> minimizes impact on our implementation code.
> 
> Notes:
> 1. There's one change in `MethodHandleProxies` to explicitly use platform 
> class loader instead of `null` for boot class loader. Tests work fine.
> 2. The null check test uses the same set of classes as CorpusTest to make it 
> suitable for tier 1.
> 3. The test is not comprehensive; currently it is permissive toward IAE, 
> because sometimes some substitution arguments are invalid, especially 
> primitive ClassDesc or Opcode with wrong types.

src/java.base/share/classes/java/lang/classfile/instruction/DiscontinuedInstruction.java
 line 37:

> 35: import jdk.internal.javac.PreviewFeature;
> 36: 
> 37: import static java.util.Objects.requireNonNull;

Isn't it unused?

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PR Review Comment: https://git.openjdk.org/jdk/pull/21458#discussion_r1797148194

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