RFR: JDK-8265078: jpackage tests on Windows leave large temp files

[Andy Herrick]

On Tue, 13 Apr 2021 20:31:38 GMT, Andy Herrick <herrick at openjdk.org> wrote:

>> That seems like overkill.  walkFileTree must call visitFile, preVisitDirectory, and postVisitDirectory synchronously, because their return value tells walkFileTree where to go next.
>
> I can use AtomicReference instead of Array to hold the IOException, but must I lock around access, there is no "setIfNull()" method

Actually there is: compareAndSet(newValue, null)

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PR: https://git.openjdk.java.net/jdk/pull/3473