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unused-append-result

Default severity: error

append returns the updated slice header. Discarding that result loses any new length or reallocated backing array. The check reports only function-local slices whose backing storage has not escaped or been observably aliased.

Bad

Section titled “Bad”
values := make([]int, 0); values = append(values, item) // values is never read again

Good

Section titled “Good”
values = append(values, item)