RFR: JDK-8296913: Correct enable preview idiom in JdbLastErrorTest.java

[Joe Darcy]

On Mon, 14 Nov 2022 19:07:42 GMT, Alan Bateman <alanb at openjdk.org> wrote:

>> Update the compile command in JdbLastErrorTest.java so that it doesn't need to be modified with each new JDK release to keep using preview features.
>
> test/jdk/com/sun/jdi/JdbLastErrorTest.java line 31:
> 
>> 29:  * @library /test/lib
>> 30:  * @run compile --release ${jdk.version} --enable-preview JdbLastErrorTest.java
>> 31:  * @run main/othervm --enable-preview JdbLastErrorTest
> 
> Better still would be to add  `@enablePreview`. That would allow you the `@run compile` line to go away and you can drop the `--enable-preview` from the `@run main`.

Is that a new jtreg feature? I've used the idiom in the updated version of this file elsewhere in the JDK.

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PR: https://git.openjdk.org/jdk/pull/11139