segfault with discrepancies in FlightRecorder options in training run and AOT cache creation

[Olivier Bourgain]

Hello,

I stumbled upon another crash.

When:
* running a Spring Boot app with https://github.com/openjdk/leyden/tree/premain
* FlightRecorder was enabled for the aotconf creation
* FlightRecorder was disabled for the aotcache creation
* FlightRecorder is enabled for the production run
Then the app crashes with a segmentation fault.

I wrote a reproducer
https://github.com/obourgain/leyden-crash/tree/crash_jfr (notice the branch
crash_jfr).

Also, -XX:StartFlightRecording option for traning and production run are
not the same, it prevents the use of the AOT cache.

Regards.
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