Ensure the dispatch source only gets deallocated after the dispatch_source_cancel is done, avoiding crashing of the Finder Sync Extension on macOS #4643
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Since
dispatch_source_cancel
works asynchronously, deallocating the dispatch source synchronously runs the risk of deallocating it beforedispatch_source_cancel
has completed, causing a crash.This PR sets a completion handler that holds a strong reference to the dispatch source to be deallocated, ensuring that the dispatch source is only deallocated after the
dispatch_source_cancel
is done.Close #4459