var y, ok = x.(error)
	if ok {
		return y
	}
	return nil
}

var a bool

//go:noinline
func testIfaceEqual(x any) {
	if x == "abc" {
		a = true
	}
}

func TestPageAccounting(t *testing.T) {
	// Grow the heap in small increments. This used to drop the
	// pages-in-use count below zero because of a rounding
	// mismatch (golang.org/issue/15022).
	const blockSize = 64 << 10