m_objectStoreTransactionCounts.count(objectStore) == 1 in UniqueIDBDatabase::operationAndTransactionTimerFired() is not necessarily true because m_objectStoreTransactionCounts may be cleared in immediateCloseForUserDelete.
Created attachment 358229 [details] Patch
Comment on attachment 358229 [details] Patch Clearing flags on attachment: 358229 Committed r239872: <https://trac.webkit.org/changeset/239872>
All reviewed patches have been landed. Closing bug.
<rdar://problem/47219558>