Keep track of the context in which an exception was thrown #95
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This is needed for `error` events in the web integration (equivalent
to Node.js's `process.on("uncaughtException")`).
This might be used by web specs like this:
> 1. Let `previousContext` be AsyncContextSwap(`someContext`).
> 2. Invoke `someCallback`. If this throws an exception `err`, then:
> 1. Let `throwContext` be the surrounding agent's
> [[ThrowAsyncContextMapping]].
> 2. If `throwContext` is EMPTY, set `throwContext` to
> AsyncContextSnapshot().
> 3. Report the exception `err` with `throwContext`.
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This is needed for
errorevents in the web integration (equivalent to Node.js'sprocess.on("uncaughtException")).The exact spec infrastructure for this is not yet settled, this is only one proposal.
This might be used by web specs like this: