Bandaid for empty operationSetQueue during _mergeAfterSaveWithResult: #1376
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Seen in the wild: many repeated crashes, by just a few users, where
_mergeAfterSaveWithResult
crashes due tooperationSetQueue
being empty and assuming that it has at least one item to pop.No idea what triggers it.
Band-aid: pre-check and, if the queue is empty at this point, add a dummy empty
PFOperationSet
.Results: that particular crash no longer appears in our Crashlytics reports. Whether the people in question are now having other difficulties, we don't know. This is obviously a state that shouldn't be reached in the first place, so the band-aid is covering a deeper problem.
ref issue #1262