Backward slice loop can use 'slices.Backward'

Reports reverse index loops over slices that can be replaced with slices.Backward.

In Go 1.23 and later, slices.Backward returns an iterator that ranges over a slice from the last element to the first. This removes manual index handling and helps avoid off-by-one errors.

Example:

func ReverseInPlace(s []int) []int {
	out := make([]int, 0, len(s))
	for i := len(s) - 1; i >= 0; i-- {
		out = append(out, s[i])
	}
	return out
}

To fix the code, use the Replace with range slices.Backward(s) quick-fix.

After the quick-fix is applied:

func ReverseInPlace(s []int) []int {
	out := make([]int, 0, len(s))
	for _, v := range slices.Backward(s) {
		out = append(out, v)
	}
	return out
}

Locating this inspection

By ID

Can be used to locate inspection in e.g. Qodana configuration files, where you can quickly enable or disable it, or adjust its settings.

GoFixSlicesBackward

Via Settings dialog

Path to the inspection settings via IntelliJ Platform IDE Settings dialog, when you need to adjust inspection settings directly from your IDE.

Settings or Preferences | Editor | Inspections | Go | Go fix

Inspection ID: GoFixSlicesBackward

Suppressing Inspection

You can suppress this inspection by placing the following comment marker before the code fragment where you no longer want messages from this inspection to appear:

//noinspection GoFixSlicesBackward

More detailed instructions as well as other ways and options that you have can be found in the product documentation:

GoLand 2026.2

Inspection Details
By default bundled with:	GoLand 2026.2, Qodana for Go 2026.2,

Last modified: 30 June 2026