RFR: 8370800: Downgrade cant.attach.type.annotations diagnostics to warnings [v8]

[Liam Miller-Cushon]

On Tue, 11 Nov 2025 15:03:19 GMT, Jan Lahoda <jlahoda at openjdk.org> wrote:

>  I am not sure if we could attach TAs on classes eagerly.

The feedback I've heard about these diagnostics has been for the field/method cases. I understand the use-case is something like the example below, where in practice the issues that have come up are all with method (and maybe fields), but not classes. I think eagerly attaching TAs to classes and only lazily attaching TAs for methods/fields would address the complaints.


// Api is packaged in a jar that does not include Foo or Bar, clients optionally bring their own implementations of those classes
class Api {
    static void foo(Foo foo) {...{
    static void bar(Bar foo) {...{
    }
}

// Client depends on a jar provided API, and a jar providing Foo. Bar is not on the classpath.
class Client {
    void (Api api, Foo foo) {
        api.foo(foo);
    }
}

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PR Comment: https://git.openjdk.org/jdk/pull/28018#issuecomment-3517446178