On Sat, 8 Aug 2026 05:41:32 GMT, Yasumasa Suenaga <[email protected]> wrote:
> We can see following errors when we run `make test` with
> `JTREG="VALUE_CLASS_PLUGIN=true;VM_OPTIONS=--enable-preview"`:
>
> TestInstanceKlassSize
>
> stderr: [Exception in thread "main" java.lang.UnsupportedClassVersionError:
> Preview features are not enabled for jdk/test/whitebox/WhiteBox (class file
> version 72.65535). Try running with '--enable-preview'
> at java.base/java.lang.ClassLoader.findBootstrapClass(Native Method)
> at java.base/java.lang.ClassLoader.findBootstrapClassOrNull(ClassLoa
> der.java:1244)
> at java.base/java.lang.System$1.findBootstrapClassOrNull(System.java
> :2068)
> at java.base/jdk.internal.loader.ClassLoaders$BootClassLoader.loadCl
> assOrNull(ClassLoaders.java:138)
> at java.base/jdk.internal.loader.BuiltinClassLoader.loadClassOrNull(
> BuiltinClassLoader.java:639)
> at java.base/jdk.internal.loader.BuiltinClassLoader.loadClassOrNull(
> BuiltinClassLoader.java:615)
> at java.base/jdk.internal.loader.BuiltinClassLoader.loadClassOrNull(
> BuiltinClassLoader.java:639)
> at java.base/jdk.internal.loader.BuiltinClassLoader.loadClassOrNull(
> BuiltinClassLoader.java:615)
> at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(Builti
> nClassLoader.java:578)
> at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:502)
> at TestInstanceKlassSize.<clinit>(TestInstanceKlassSize.java:65)
> ]
> exitValue = 1
>
> java.lang.RuntimeException: Expected to get exit value of [0], exit value is
> : [1]
> at jdk.test.lib.process.OutputAnalyzer.shouldHaveExitValue(OutputAna
> lyzer.java:602)
> at TestInstanceKlassSize.startMeWithArgs(TestInstanceKlassSize.java:
> 100)
> at TestInstanceKlassSize.main(TestInstanceKlassSize.java:152)
> at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(
> DirectMethodHandleAccessor.java:104)
> at java.base/java.lang.reflect.Method.invoke(Method.java:583)
> at com.sun.javatest.regtest.agent.MainMethodHelper.executeModernMain
> Class(MainMethodHelper.java:55)
> at com.sun.javatest.regtest.agent.MainWrapper$MainTask.run(MainWrapp
> er.java:138)
> at java.base/java.lang.Thread.run(Thread.java:1527)
>
>
> TestInstanceKlassSizeForInterface
>
> stderr: [Exception in thread "main" java.lang.UnsupportedClassVersionError:
> Preview features are not enabled for jdk/test/whitebox/WhiteBox (class file
> version 72.65535). Try running with '--enable-preview'
> at java.base/java.lang.ClassLoader.findBootstrapClass(Native Method)
> ...
As the description what I pasted, the problem happened at startup phase in the
test (SA) process spawned by `createLimitedTestJavaProcessBuilder`.
stderr: [Exception in thread "main" java.lang.UnsupportedClassVersionError:
Preview features are not enabled for jdk/test/whitebox/WhiteBox (class file
version 72.65535). Try running with '--enable-preview'
<snip>
at TestInstanceKlassSize.<clinit>(TestInstanceKlassSize.java:65)
L65 at TestInstanceKlassSIze is instantiating `WhiteBox` as being explained in
exception message.
65 public static WhiteBox wb = WhiteBox.getWhiteBox();
Hence I think we need to add `--enable-preview` into the launcher -
`createLimitedTestJavaProcessBuilder` is only one in this case I think. Can we
have another solution(s) or another place(s) to add?
-------------
PR Comment: https://git.openjdk.org/jdk/pull/32262#issuecomment-5248454312
