RFR: 8293862: javax/swing/JFileChooser/8046391/bug8046391.java failed with 'Cannot invoke "java.awt.Image.getWidth(java.awt.image.ImageObserver)" because "retVal" is null' [v4]

[Sergey Bylokhov]

On Thu, 22 Dec 2022 05:13:34 GMT, Tejesh R <tr at openjdk.org> wrote:

>> Observation found when JFileChooser is instantiated in WindowsLookAndFeel which invokes getSystemIcon() from WindowsFileChooserUI class. Could not find the exact root cause so predicting it to be an issue with icons not loaded where resolutionVariants map is empty in _public Image getResolutionVariant(double width, double height) _. Hence proposing a null check before accessing getWidth(). Fix is tested in CI system.
>
> Tejesh R has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Updated based on review comments

Did we check how the native code works w/o using JFileChooser, buy FileSystemView, or by the native example? Is it possible that it is intermittent because of timing related to "com" thread?

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PR: https://git.openjdk.org/jdk/pull/11104