RFR: 8241840: Memoryleak: Closed focused Stages are not collected with Monocle.

Mon Mar 30 14:04:42 UTC 2020

On Mon, 30 Mar 2020 13:37:51 GMT, Florian Kirmaier <fkirmaier at openjdk.org> wrote:

> Closed focused Stages are not collected with Monocle
> 
> This commit adds a unit-test and a fix for collecting focused closed stages.
> 
> ticket: https://bugs.openjdk.java.net/browse/JDK-8241840

@arapte can you also review?

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PR: https://git.openjdk.java.net/jfx/pull/153