When selecting regions for optional evacuation, the pinned attribute is not set in G1CollectedHeap::register_old_region_with_region_attr. As a result, regions containing pinned objects may be incorrectly evacuated, potentially leading to the movement of pinned objects and causing crashes in JNI. This issue was first reported by zstd-jni in the pull request: https://github.com/openjdk/jdk/pull/22015.

Note:
G1PrepareRegionsClosure fixes this for the regular evacuation