if name := line.Function.Name; name == "runtime/pprof.recursionCaller" || name == "runtime/pprof.recursionCallee" {
				recursionFunc++
			}
		}
		if recursionFunc > 1 {
			t.Fatalf("want at most one recursionCaller or recursionCallee in one Location, got a violating Location (index: %d):\n%v", i, p)
		}
	}
}

func recursionCaller(x int) int {
	y := recursionCallee(3, x)
	return y
}