aedec452b9
rearrange_stdio() invalidates specified fds even on failure, which means we should always invalidate the fds we pass in no matter what. Let's make this explicit by using TAKE_FD() for that everywhere. Note that in many places we such invalidation doesnt get us much behaviour-wise, since we don't use the variables anymore later. But TAKE_FD() in a way is also documentation, it encodes explicitly that the fds are invalidated here, so I think it's a good thing to always make this explicit here.
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