fix: prevent race condition and panic in events.Producer.Broadcast #4180
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Fix race condition in events.Producer.Broadcast that caused panics when subscriptions were cancelled concurrently with broadcasts. Copy subscription list under lock and add recover() to handle closed channel panics. Without this fix, the application crashes with "send on closed channel" panic when Next() closes a subscription channel while Broadcast sends to it.
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Fix race condition in events.Producer.Broadcast that caused panics when subscriptions were cancelled concurrently with broadcasts. Copy subscription list under lock and add recover() to handle closed channel panics.
Without this fix, the application crashes with "send on closed channel" panic when Next() closes a subscription channel while Broadcast sends to it.