Using slice doesn't work properly

[acumino]

What version of Go are you using (go version)?

Both 1.17 and 1.18

Does this issue reproduce with the latest release?

Yes

What did you do?

Using slices in recursion and assigning its values to some value in any struct.

See here: https://go.dev/play/p/iUZ5tF5AUJP

The correct printed value should be

[{[value1 value1 value1 value1 value1 value2 value3]}]

But it is printing

[{[value1 value1 value1 value1 value1 value3 value3]}]

The same thing works fine if we don't use any struct.

See here: https://go.dev/play/p/d3ZLQTDPeoy

In this case the printed value is

[value1 value1 value1 value1 value1 value2 value3]

[randall77]

This is how slices work. Append does not always make a copy, but often appends in place.
See https://go.dev/blog/slices-intro for more background.

This patch fixes your code:

	if len(a) == 7 {
		a2 := make([]string, len(a))
		copy(a2, a)
		res := test{l: a2}