I failed to deduce why analyzer thinks E882 may not be triggered, though
conditions for triggering it are strange: it would trigger E882 only in the
single case “function returned non-number”. Cases “function thrown exception”,
or “built-in sorter encountered error” will neither yield E882 nor stop
sort()/uniq().
Note though that searching test code revealed that neither E702 nor E882 are not
tested anywhere.
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