[lworld] RFR: 8373622: [lworld] Enabling jimage changes break tests with inMemoryJavaCompiler

[Chen Liang]

On Fri, 12 Dec 2025 20:53:03 GMT, Coleen Phillimore <coleenp at openjdk.org> wrote:

> This change tests the properties: java.test.opts and the property for test.enable.preview (set when test has @enablePreview), and will pass --enable-preview -source 26 to the inMemoryJavaCompiler compiler task.  I don't really like this but the alternative is to do the same thing from all the tests, and pass this down as parameters.  Better alternative ideas are welcome.
> 
> When the jimage code is checked in, a bunch of tests fail because of this problem.
> 
> Testing with tier1-4.

test/lib/jdk/test/lib/compiler/InMemoryJavaCompiler.java line 275:

> 273:                 opts.add("26");
> 274:             }
> 275:         }

if (System.getProperty("test.java.opts", "").contains("--enable-preview")
        || System.getProperty("test.enable.preview", "").equals("true")) {
        opts.add("--enable-preview");
        opts.add("-source");
        opts.add(Integer.toString(Runtime.version().feature()));
}

I recommend using `Runtime.version().feature()` instead of hardcoded version.

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PR Review Comment: https://git.openjdk.org/valhalla/pull/1797#discussion_r2619970670