[Flight] do not emit error after abort #30683
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sebmarkbage
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Aug 14, 2024
| @@ -2183,7 +2183,7 @@ function renderModel( | |||
| } | |||
| } | |||
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| if (thrownValue === AbortSigil) { | |||
| if (request.status === ABORTING || x === AbortSymbol) { | |||
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No need to compare against the symbol since all cases it is thrown.
sebmarkbage
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I updated the impl, needs another look
sebmarkbage
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Aug 14, 2024
| @@ -591,9 +589,11 @@ function serializeThenable( | |||
| logPostpone(request, postponeInstance.message, newTask); | |||
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Shouldn't postpone get the same treatment?
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When synchronously aborting in a non-async Function Component if you throw after aborting the task would error rather than abort because React never observed the AbortSignal. This change adds an additional check to see if the request is currently aborting. I left the sigil check in place too in case a task pings after the request is closed (though I'm pretty sure that can't actually happen) I also renamed AbortSigil to AbortSymbol and changed it to a Symbol to make some of the duck typing more efficient.
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When synchronously aborting in a non-async Function Component if you throw after aborting the task would error rather than abort because React never observed the AbortSignal.
Using a sigil to throw after aborting during render isn't effective b/c the user code itself could throw so insteead we just read the request status. This is ok b/c we don't expect any tasks to still be pending after the currently running task finishes.
However I found one instance where that wasn't true related to serializing thenables which I've fixed so we may find other cases. If we do, though it's almost certainly a bug in our task bookkeeping so we should just fix it if it comes up.
I also updated
abortto not set the status to ABORTING unless the status was OPEN. we don't want to ever leave CLOSED or CLOSING status