Fix potential races in createWaitForEvent* #1391
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It is possible (and noticed in the real world) that the goroutine might enter the out select and then by the time get to writing to the channel back for the event handling to have been canceled.
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What?
Try to prevent blocking on channel send.
Why?
It is possible (and noticed in the real world) that the goroutine might enter the out select and then by the time get to writing to the channel back for the event handling to have been canceled.
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