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Rintaro Ishizaki
6cf8500d8b
`QueuedTask.resultTask` passed `self.priority` as `initialPriority` to `withTaskPriorityChangedHandler`. If `elevatePriority(to:)` ran before `resultTask`'s body started (e.g. the detached task hadn't been scheduled yet), `self.priority` was already set to the elevated value, so the polling baseline matched `Task.currentPriority` and `taskPriorityChanged` never fired. The callback is what calls `poke()`, so the scheduler never re-evaluated the elevated task and it could stall until an upstream 180s timeout cancelled the chain. Use the captured `priority` parameter instead. It matches the priority that `Task.detached(priority: priority)` uses to launch the resultTask and isn't subject to mutation by `elevatePriority`.