RFR: 8349907: jdk.tools.jlink.internal.plugins.ZipPlugin does not close the Deflater in exceptional cases [v2]

[Chen Liang]

On Wed, 12 Feb 2025 15:45:25 GMT, Jaikiran Pai <jpai at openjdk.org> wrote:

>> Can I please get a review of this change in `jdk.tools.jlink.internal.plugins.ZipPlugin` which proposes to close the `Deflater` instance cleanly? This addresses https://bugs.openjdk.org/browse/JDK-8349907.
>> 
>> As noted in that issue, the `Deflater` instance wasn't being closed in the exception code path of this method. The commit in this PR merely changes the code to use a try-with-resources block on the `Deflater` instance.
>> 
>> No new tests have been introduced given the nature of the change. I've added a `noreg-hard` to the issue. Existing tier1, tier2 and tier3 tests continue to pass with this change without any related failures.
>
> Jaikiran Pai has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Lance's suggestion

src/jdk.jlink/share/classes/jdk/tools/jlink/internal/plugins/ZipPlugin.java line 99:

> 97:             return stream.toByteArray(); // the compressed output
> 98:         } catch (IOException e) {
> 99:             return bytesIn; // return the original uncompressed input

Can we add an `assert false : e;` assertion because this really shouldn't happen?

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PR Review Comment: https://git.openjdk.org/jdk/pull/23588#discussion_r1952914841