[lworld] RFR: 8373826: [lworld] Test PreviewAutoSuppress fails since jimage change

[Paul Hübner]

On Wed, 17 Dec 2025 13:33:25 GMT, Jan Lahoda <jlahoda at openjdk.org> wrote:

> Fixing `test/langtools/tools/javac/diags/CheckExamples.java` (`test/langtools/tools/javac/diags/examples/PrimitivePatternMatching.java`) and `test/langtools/tools/javac/preview/PreviewAutoSuppress.java` tests.
> 
> Unfortunately, it is quite hard to make the tests work both with and without `-DDISABLE_PREVIEW_PATCHING=true` (could be done for `PreviewAutoSuppress.java`, but it is very hard to do sensible for `CheckExamples.java`), so given the future is `-DDISABLE_PREVIEW_PATCHING=true`, this change forces this option. (The practical impact of testing only this variant for these two tests is basically zero, I think. We have a different test that verifies all the combinations.)

FYI, these tests were problemlisted, among many others, in #1815 to address noise issues.

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PR Comment: https://git.openjdk.org/valhalla/pull/1813#issuecomment-3665638510