// run package main import "runtime/debug" func f(m map[int]*string, i int) { s := "" m[i] = &s } func main() { debug.SetGCPercent(0) m := map[int]*string{} for i := 0; i < 40; i++ { f(m, i) if len(*m[i]) != 0 { println("bad length", i, m[i], len(*m[i])) panic("bad length") } } }