[Rev 02] RFR: 8246348: Crash in libpango on Ubuntu 20.04 with some unicode chars

[Phil Race]

On Fri, 12 Jun 2020 15:01:35 GMT, Johan Vos <jvos at openjdk.org> wrote:

>> This addresses https://bugs.openjdk.java.net/browse/JDK-8246348
>
> Johan Vos has updated the pull request incrementally with one additional commit since the last revision:
> 
>   use LinkedHashMap instead of HashMap
>   Only store the pointer to the utf8 string if its creation was successful

Marked as reviewed by prr (Reviewer).

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PR: https://git.openjdk.java.net/jfx/pull/249