Okay, it's not the `Promise.all`. `cancel()` is indeed being called first.
Bug 1765811 Comment 2 Edit History
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Okay, it's not `Promise.all`. `cancel()` is indeed being called first.
Okay, it's not `Promise.all`. `cancel()` is indeed being called first. (`ReadableStreamCancel` calls `cancel()` synchronously but `WritableStreamAbort` calls `abort()` asynchronously)