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    6d7c1227
    Client ensures subscribe command is confirmed. (#41581) · 6d7c1227
    Dan Spinosa authored 
    A SubscriptionGuarantor maintains a set of pending subscriptions,
resending the subscribe command unless and until the subscription
is confirmed or rejected by the server or cancelled client-side.

A race condition in the ActionCable server - where an unsubscribe
is sent, followed rapidly by a subscribe, but handled in the reverse
order - necessitates this enhancement.  Indeed, the subscriptions created
and torn down by Turbo Streams amplifies the existence of this race
condition.
    6d7c1227
    Client ensures subscribe command is confirmed. (#41581)
    Dan Spinosa authored 
    A SubscriptionGuarantor maintains a set of pending subscriptions,
resending the subscribe command unless and until the subscription
is confirmed or rejected by the server or cancelled client-side.

A race condition in the ActionCable server - where an unsubscribe
is sent, followed rapidly by a subscribe, but handled in the reverse
order - necessitates this enhancement.  Indeed, the subscriptions created
and torn down by Turbo Streams amplifies the existence of this race
condition.
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