Antonio Scandurra d7fcb049d4 Don't register an entity ID extractor for non-entity subscriptions ... This commit fixes a panic that could occur when registering N subscriptions for N entities of the same kind. Before, when dropping the first of the subscriptions, we would remove the entity ID extractor as well. This was, however, used by all the other N - 1 subscriptions which would then start losing messages. In addition, dropping yet another subscription of that kind would result in a panic, because we wouldn't find the extractor in the map upon invoking `Subscription::drop`. With this change we will avoid removing the ID extractor when dropping a subscription. Crucially, we also avoid inserting extractors for simple message subscriptions. This enables these non-entity subscriptions to be dropped and re-registered without seeing a "registered handler for the same message twice" panic.		2022-01-11 08:21:35 +01:00
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src
Cargo.toml