GO Lang Pointers outside of scope [duplicate]

Question

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returning pointer from a local variable in function (1 answer)

Is returning a slice of a local array in a Go function safe? (3 answers)

Return pointer to local struct (2 answers)

Closed 40 mins ago.

Today i was reviewing some code and i found the following behavior:

func main(){
   a := testing()
   fmt.Println(*a)
}

func testing() *int{
   i := 7
   return &i
}

https://go.dev/play/p/Peubn0degBr

OUTPUT: 7

My question is: what is happening here? var i only exists on the scope of testing(). But somehow go lang saves the pointer and understands that it needs that value.