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

[Johan Vos]

On Fri, 12 Jun 2020 18:28:47 GMT, Phil Race <prr at openjdk.org> wrote:

>> 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).

> As for the test, even if StubFont were updated to provide a real font, the StubToolkit doesn't load Prism (so none of
> the text rendering code is exercised). Do you think you could instead add a simple test or two in the system tests
> project instead (maybe one testing UTF16 chars and one with a 0 char)?

I added a systemtest

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