1.x: fix multiple chained Single.doAfterTerminate not calling actions #3883
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This was referenced Apr 27, 2016
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Resolves #3881.
The bug is caused by the impedance mismatch between
Observable'sSubscriberandSingle'sSingleSubscriber. The original code calledonNext()which immediately signalled anonSuccessbut also caused an unsubscription, preventing a delivery ofonCompleted()in the inner Single.The fix keeps
onSuccess/onErrorrails intact throughout the chain.