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In BF-30149 it was found that in very rare cases it is possible for ReshardingCoordinator Instance to be destroyed before Instance::run() is called by the POS framework as described in this comment. In this case the ReshardingCoordinator destructor would be called following which ReshardingCoordinatorOpObserver destructor would invariant on promises:
ReshardingCoordinatorObserver::~ReshardingCoordinatorObserver() {
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stdx::lock_guard<Latch> lg(_mutex);
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invariant(_allDonorsReportedMinFetchTimestamp.getFuture().isReady());
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invariant(_allRecipientsFinishedCloning.getFuture().isReady());
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invariant(_allRecipientsReportedStrictConsistencyTimestamp.getFuture().isReady());
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invariant(_allRecipientsDone.getFuture().isReady());
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invariant(_allDonorsDone.getFuture().isReady());
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}
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We should pass through the invariant checks if Instance::run() is not called.
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