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faf13dd112
Fall back to _SC_NPROCESSORS_ONLN if sched_getaffinity returns an empty mask Followup to #115946 A gentler fix for #115868, one that doesn't panic, [suggested on zulip](https://rust-lang.zulipchat.com/#narrow/stream/259402-t-libs.2Fmeetings/topic/Meeting.202023-09-19/near/391942927) In that situation - on the buggy kernel versions - a zero-mask means no affinities have been set so `_SC_NPROCESSORS_ONLN` provides the right value. |
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