outputFiles << outputFile

        outputFiles.each {
            it << "output ${it.name}"
        }

        def overlappingFile = subDir.file("overlap")
        overlappingFile << "overlapping file"

        when:
        cleanupOutput(outputDir, subDir, *outputFiles)
        then:
        _ * dirSafeToDelete.test(subDir) >> true

}

func (x *ctr) XORKeyStream(dst, src []byte) {
	if len(dst) < len(src) {
		panic("crypto/cipher: output smaller than input")
	}
	if alias.InexactOverlap(dst[:len(src)], src) {
		panic("crypto/cipher: invalid buffer overlap")
	}
	for len(src) > 0 {
		if x.outUsed >= len(x.out)-x.b.BlockSize() {
			x.refill()
		}
		n := subtle.XORBytes(dst, src, x.out[x.outUsed:])
		dst = dst[n:]
		src = src[n:]
		x.outUsed += n
	}

        hasher.putInt(1)
        hasher.hash()

        when:
        hasher.hash()

        then:
        thrown(IllegalStateException)
    }

    def 'hashers can overlap'() {
        when:
        def hasher1 = Hashing.newHasher()
        hasher1.putInt(1)

        and:
        def hasher2 = Hashing.newHasher()
        hasher2.putInt(1)

// A SuggestedFix is a code change associated with a Diagnostic that a
// user can choose to apply to their code. Usually the SuggestedFix is
// meant to fix the issue flagged by the diagnostic.
//
// The TextEdits must not overlap, nor contain edits for other packages.
type SuggestedFix struct {
	// A description for this suggested fix to be shown to a user deciding
	// whether to accept it.
	Message   string
	TextEdits []TextEdit
}

func (c *aesctr) XORKeyStream(dst, src []byte) {
	if len(dst) < len(src) {
		panic("crypto/cipher: output smaller than input")
	}
	if alias.InexactOverlap(dst[:len(src)], src) {
		panic("crypto/cipher: invalid buffer overlap")
	}
	for len(src) > 0 {
		if len(c.buffer) == 0 {
			c.refill()
		}
		n := xorBytes(dst, src, c.buffer)
		c.buffer = c.buffer[n:]
		src = src[n:]
		dst = dst[n:]
	}

			valid:      false,
		},
		{
			name:       "explicit wildcard region overlap",
			localities: []string{"*", "a/b/c"},
			valid:      false,
		},
		{
			name:       "implicit wildcard region overlap",
			localities: []string{"a", "a/b/c"},
			valid:      false,
		},
		{
			name:       "explicit wildcard zone overlap",
			localities: []string{"a/*", "a/b/c"},
			valid:      false,
		},

	buf := append(out[:0], 2)
	buf[0] |= y.Bytes()[p521ElementLength-1] & 1
	buf = append(buf, x.Bytes()...)
	return buf
}

// Add sets q = p1 + p2, and returns q. The points may overlap.
func (q *P521Point) Add(p1, p2 *P521Point) *P521Point {
	// Complete addition formula for a = -3 from "Complete addition formulas for
	// prime order elliptic curves" (https://eprint.iacr.org/2015/1060), §A.2.

	buf := append(out[:0], 2)
	buf[0] |= y.Bytes()[p256ElementLength-1] & 1
	buf = append(buf, x.Bytes()...)
	return buf
}

// Add sets q = p1 + p2, and returns q. The points may overlap.
func (q *P256Point) Add(p1, p2 *P256Point) *P256Point {
	// Complete addition formula for a = -3 from "Complete addition formulas for
	// prime order elliptic curves" (https://eprint.iacr.org/2015/1060), §A.2.

// srcend R4
// dstend R5
// data   R6-R17
// tmp1   R14

// Copies are split into 3 main cases: small copies of up to 32 bytes, medium
// copies of up to 128 bytes, and large copies. The overhead of the overlap
// check is negligible since it is only required for large copies.
//
// Large copies use a software pipelined loop processing 64 bytes per iteration.
// The destination pointer is 16-byte aligned to minimize unaligned accesses.

	_ interface{int|any}
	_ interface{int|~string|union}
	_ interface{int|~string|interface{int}}
	_ interface{union|int}   // interfaces (here: union) are ignored when checking for overlap
	_ interface{union|union} // ditto

	// For now we do not permit interfaces with methods in unions.
	_ interface{~ /* ERROR "invalid use of ~" */ any}
	_ interface{int|interface /* ERRORx `cannot use .* in union` */ { m() }}