x := make([]byte, size)
		for i := range x {
			x[i] = "ab"[i%2]
		}
		testSA(t, x, build)
	})

	t.Run("forcealloc", func(t *testing.T) {
		// Construct a pathological input that forces
		// recurse_32 to allocate a new temporary buffer.
		// The input must have more than N/3 LMS-substrings,
		// which we arrange by repeating an SLSLSLSLSLSL pattern
		// like ababab... above, but then we must also arrange