2.x: dedicated Single.zip implementation, no dispose on all-success #5027
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This adds a dedicated implementation for zipping
Single
s (adapted fromMaybeZipX
).Routing the original
zip
throughFlowable
added the usually unwanted behavior of cancelling the sources if one of them reports a completion after a row has been consumed from all (when converted toFlowable
,SingleObserver.onSuccess
becomesSubscriber.onNext
+onComplete
). Since there is onlyonSuccess
andonError
inSingle
, there is no need to dispose the sources once all signalled their onlyonSuccess
.Related: #5024.