TransformTerminus::do_io_*: handle null buffer #11859
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This is a very similar change as apache#11789. With this patch, TransformTerminus properly supports a 0 byte read to cancel VIO. Without this patch, the logic naively scheduled an event which called the handler which would crash on what was often a canceled continuation or otherwise invalid continuation.
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This is a very similar change as #11789. With this patch, TransformTerminus properly supports a 0 byte read to cancel VIO. Without this patch, the logic naively scheduled an event which called the handler which would crash on what was often a canceled continuation or otherwise invalid continuation.