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Not confirmed as as fix, but repairs potential issue with concurrent access to g_overlayDB.
Main changes:
g_overlayDB
, which is used in Precompiled contracts, now is not global, but is a parameter toexecutePrecompiled
Tetsts:
1 tested with existing
JsonRpcSuite/FilestorageCacheSuite
2 tested possible partial catch-up after nullptr in _overlayFS manually with filestorage.js tests
Performance impact: absent