From 75c3b33899954e7a0925426b38fd1084d521c3a0 Mon Sep 17 00:00:00 2001
From: "dependabot-preview[bot]"
 <27856297+dependabot-preview[bot]@users.noreply.github.com>
Date: Thu, 28 Jan 2021 09:17:40 +0000
Subject: Bump github.com/containers/image/v5 from 5.9.0 to 5.10.0

Bumps [github.com/containers/image/v5](https://github.com/containers/image) from 5.9.0 to 5.10.0.
- [Release notes](https://github.com/containers/image/releases)
- [Commits](https://github.com/containers/image/compare/v5.9.0...v5.10.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>
Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>
---
 vendor/github.com/ulikunitz/xz/SECURITY.md         |  10 ++
 vendor/github.com/ulikunitz/xz/TODO.md             | 108 ++++++++++++---------
 vendor/github.com/ulikunitz/xz/format.go           |  22 +----
 vendor/github.com/ulikunitz/xz/lzma/bintree.go     |   5 +-
 vendor/github.com/ulikunitz/xz/lzma/bitops.go      |   2 +
 vendor/github.com/ulikunitz/xz/lzma/decoder.go     |   2 +-
 vendor/github.com/ulikunitz/xz/lzma/decoderdict.go |   7 --
 vendor/github.com/ulikunitz/xz/lzma/directcodec.go |  11 ---
 vendor/github.com/ulikunitz/xz/lzma/distcodec.go   |  16 ---
 vendor/github.com/ulikunitz/xz/lzma/encoderdict.go |   2 +-
 vendor/github.com/ulikunitz/xz/lzma/header2.go     |   2 +-
 vendor/github.com/ulikunitz/xz/lzma/lengthcodec.go |  13 ---
 .../github.com/ulikunitz/xz/lzma/literalcodec.go   |   7 --
 vendor/github.com/ulikunitz/xz/lzma/operation.go   |  25 -----
 vendor/github.com/ulikunitz/xz/lzma/rangecodec.go  |  26 -----
 vendor/github.com/ulikunitz/xz/lzma/reader2.go     |   1 -
 vendor/github.com/ulikunitz/xz/lzma/state.go       |   6 --
 vendor/github.com/ulikunitz/xz/reader.go           |  15 ---
 vendor/github.com/ulikunitz/xz/writer.go           |   4 +
 19 files changed, 87 insertions(+), 197 deletions(-)
 create mode 100644 vendor/github.com/ulikunitz/xz/SECURITY.md

(limited to 'vendor/github.com/ulikunitz')

diff --git a/vendor/github.com/ulikunitz/xz/SECURITY.md b/vendor/github.com/ulikunitz/xz/SECURITY.md
new file mode 100644
index 000000000..5f7ec01b3
--- /dev/null
+++ b/vendor/github.com/ulikunitz/xz/SECURITY.md
@@ -0,0 +1,10 @@
+# Security Policy
+
+## Supported Versions
+
+Currently the last minor version v0.5.x is supported.
+
+## Reporting a Vulnerability
+
+Report a vulnerability by creating a Github issue at
+<https://github.com/ulikunitz/xz/issues>. Expect a response in a week.
diff --git a/vendor/github.com/ulikunitz/xz/TODO.md b/vendor/github.com/ulikunitz/xz/TODO.md
index 84bd5dcbd..88c7341c8 100644
--- a/vendor/github.com/ulikunitz/xz/TODO.md
+++ b/vendor/github.com/ulikunitz/xz/TODO.md
@@ -8,19 +8,17 @@
 
 1. Review encoder and check for lzma improvements under xz.
 2. Fix binary tree matcher.
-3. Compare compression ratio with xz tool using comparable parameters
-   and optimize parameters
-4. Do some optimizations
-    - rename operation action and make it a simple type of size 8
-    - make maxMatches, wordSize parameters
-    - stop searching after a certain length is found (parameter sweetLen)
+3. Compare compression ratio with xz tool using comparable parameters and optimize parameters
+4. rename operation action and make it a simple type of size 8
+5. make maxMatches, wordSize parameters
+6. stop searching after a certain length is found (parameter sweetLen)
 
 ## Release v0.7
 
 1. Optimize code
 2. Do statistical analysis to get linear presets.
 3. Test sync.Pool compatability for xz and lzma Writer and Reader
-3. Fuzz optimized code.
+4. Fuzz optimized code.
 
 ## Release v0.8
 
@@ -44,53 +42,73 @@
 
 ## Package lzma
 
-### Release v0.6
-
-- Rewrite Encoder into a simple greedy one-op-at-a-time encoder
-  including
-    + simple scan at the dictionary head for the same byte
-    + use the killer byte (requiring matches to get longer, the first
-      test should be the byte that would make the match longer)
+### v0.6
 
+* Rewrite Encoder into a simple greedy one-op-at-a-time encoder including
+  * simple scan at the dictionary head for the same byte
+  * use the killer byte (requiring matches to get longer, the first test should be the byte that would make the match longer)
 
 ## Optimizations
 
-- There may be a lot of false sharing in lzma.State; check whether this
-  can be improved by reorganizing the internal structure of it.
-- Check whether batching encoding and decoding improves speed.
+* There may be a lot of false sharing in lzma. State; check whether this  can be improved by reorganizing the internal structure of it.
+
+* Check whether batching encoding and decoding improves speed.
 
 ### DAG optimizations
 
-- Use full buffer to create minimal bit-length above range encoder.
-- Might be too slow (see v0.4)
+* Use full buffer to create minimal bit-length above range encoder.
+* Might be too slow (see v0.4)
 
 ### Different match finders
 
-- hashes with 2, 3 characters additional to 4 characters
-- binary trees with 2-7 characters (uint64 as key, use uint32 as
+* hashes with 2, 3 characters additional to 4 characters
+* binary trees with 2-7 characters (uint64 as key, use uint32 as
+
   pointers into a an array)
-- rb-trees with 2-7 characters (uint64 as key, use uint32 as pointers
+
+* rb-trees with 2-7 characters (uint64 as key, use uint32 as pointers
+
   into an array with bit-steeling for the colors)
 
 ## Release Procedure
 
-- execute goch -l for all packages; probably with lower param like 0.5.
-- check orthography with gospell
-- Write release notes in doc/relnotes.
-- Update README.md
-- xb copyright . in xz directory to ensure all new files have Copyright
-  header
-- VERSION=<version> go generate github.com/ulikunitz/xz/... to update
-  version files
-- Execute test for Linux/amd64, Linux/x86 and Windows/amd64.
-- Update TODO.md - write short log entry
-- git checkout master && git merge dev
-- git tag -a <version>
-- git push
+* execute goch -l for all packages; probably with lower param like 0.5.
+* check orthography with gospell
+* Write release notes in doc/relnotes.
+* Update README.md
+* xb copyright . in xz directory to ensure all new files have Copyright header
+* `VERSION=<version> go generate github.com/ulikunitz/xz/...` to update version files
+* Execute test for Linux/amd64, Linux/x86 and Windows/amd64.
+* Update TODO.md - write short log entry
+* `git checkout master && git merge dev`
+* `git tag -a <version>`
+* `git push`
 
 ## Log
 
-## 2020-08-19
+### 2020-12-17
+
+Release v0.5.9 fixes warnings, a typo and adds SECURITY.md.
+
+One fix is interesting.
+
+```go
+const (
+  a byte = 0x1
+  b      = 0x2
+)
+```
+
+The constants a and b don't have the same type. Correct is
+
+```go
+const (
+  a byte = 0x1
+  b byte = 0x2
+)
+```
+
+### 2020-08-19
 
 Release v0.5.8 fixes issue
 [issue #35](https://github.com/ulikunitz/xz/issues/35).
@@ -208,8 +226,8 @@ MININT.
 
 ### 2015-06-04
 
-It has been a productive day. I improved the interface of lzma.Reader
-and lzma.Writer and fixed the error handling.
+It has been a productive day. I improved the interface of lzma. Reader
+and lzma. Writer and fixed the error handling.
 
 ### 2015-06-01
 
@@ -260,7 +278,7 @@ needed anymore.
 
 However I will implement a ReaderState and WriterState type to use
 static typing to ensure the right State object is combined with the
-right lzbase.Reader and lzbase.Writer.
+right lzbase. Reader and lzbase. Writer.
 
 As a start I have implemented ReaderState and WriterState to ensure
 that the state for reading is only used by readers and WriterState only
@@ -282,11 +300,11 @@ old lzma package has been completely removed.
 
 ### 2015-04-05
 
-Implemented lzma.Reader and tested it.
+Implemented lzma. Reader and tested it.
 
 ### 2015-04-04
 
-Implemented baseReader by adapting code form lzma.Reader.
+Implemented baseReader by adapting code form lzma. Reader.
 
 ### 2015-04-03
 
@@ -302,7 +320,7 @@ However in Francesco Campoy's presentation "Go for Javaneros
 (Javaïstes?)" is the the idea that using an embedded field E, all the
 methods of E will be defined on T. If E is an interface T satisfies E.
 
-https://talks.golang.org/2014/go4java.slide#51
+<https://talks.golang.org/2014/go4java.slide#51>
 
 I have never used this, but it seems to be a cool idea.
 
@@ -327,11 +345,11 @@ and the opCodec.
 
 1. Implemented simple lzmago tool
 2. Tested tool against large 4.4G file
-    - compression worked correctly; tested decompression with lzma
-    - decompression hits a full buffer condition
+   * compression worked correctly; tested decompression with lzma
+   * decompression hits a full buffer condition
 3. Fixed a bug in the compressor and wrote a test for it
 4. Executed full cycle for 4.4 GB file; performance can be improved ;-)
 
 ### 2015-01-11
 
-- Release v0.2 because of the working LZMA encoder and decoder
+* Release v0.2 because of the working LZMA encoder and decoder
diff --git a/vendor/github.com/ulikunitz/xz/format.go b/vendor/github.com/ulikunitz/xz/format.go
index edfec9a94..84b58c9dd 100644
--- a/vendor/github.com/ulikunitz/xz/format.go
+++ b/vendor/github.com/ulikunitz/xz/format.go
@@ -47,9 +47,9 @@ const HeaderLen = 12
 // Constants for the checksum methods supported by xz.
 const (
 	None   byte = 0x0
-	CRC32       = 0x1
-	CRC64       = 0x4
-	SHA256      = 0xa
+	CRC32  byte = 0x1
+	CRC64  byte = 0x4
+	SHA256 byte = 0xa
 )
 
 // errInvalidFlags indicates that flags are invalid.
@@ -569,22 +569,6 @@ func readFilters(r io.Reader, count int) (filters []filter, err error) {
 	return []filter{f}, err
 }
 
-// writeFilters writes the filters.
-func writeFilters(w io.Writer, filters []filter) (n int, err error) {
-	for _, f := range filters {
-		p, err := f.MarshalBinary()
-		if err != nil {
-			return n, err
-		}
-		k, err := w.Write(p)
-		n += k
-		if err != nil {
-			return n, err
-		}
-	}
-	return n, nil
-}
-
 /*** Index ***/
 
 // record describes a block in the xz file index.
diff --git a/vendor/github.com/ulikunitz/xz/lzma/bintree.go b/vendor/github.com/ulikunitz/xz/lzma/bintree.go
index 58d6a92a7..527ea19a7 100644
--- a/vendor/github.com/ulikunitz/xz/lzma/bintree.go
+++ b/vendor/github.com/ulikunitz/xz/lzma/bintree.go
@@ -5,10 +5,7 @@
 package lzma
 
 import (
-	"bufio"
 	"errors"
-	"fmt"
-	"io"
 	"unicode"
 )
 
@@ -349,6 +346,7 @@ func dumpX(x uint32) string {
 	return string(a)
 }
 
+/*
 // dumpNode writes a representation of the node v into the io.Writer.
 func (t *binTree) dumpNode(w io.Writer, v uint32, indent int) {
 	if v == null {
@@ -377,6 +375,7 @@ func (t *binTree) dump(w io.Writer) error {
 	t.dumpNode(bw, t.root, 0)
 	return bw.Flush()
 }
+*/
 
 func (t *binTree) distance(v uint32) int {
 	dist := int(t.front) - int(v)
diff --git a/vendor/github.com/ulikunitz/xz/lzma/bitops.go b/vendor/github.com/ulikunitz/xz/lzma/bitops.go
index 2784ec6ba..d4309f97e 100644
--- a/vendor/github.com/ulikunitz/xz/lzma/bitops.go
+++ b/vendor/github.com/ulikunitz/xz/lzma/bitops.go
@@ -18,6 +18,7 @@ var ntz32Table = [32]int8{
 	30, 17, 8, 14, 29, 13, 28, 27,
 }
 
+/*
 // ntz32 computes the number of trailing zeros for an unsigned 32-bit integer.
 func ntz32(x uint32) int {
 	if x == 0 {
@@ -26,6 +27,7 @@ func ntz32(x uint32) int {
 	x = (x & -x) * ntz32Const
 	return int(ntz32Table[x>>27])
 }
+*/
 
 // nlz32 computes the number of leading zeros for an unsigned 32-bit integer.
 func nlz32(x uint32) int {
diff --git a/vendor/github.com/ulikunitz/xz/lzma/decoder.go b/vendor/github.com/ulikunitz/xz/lzma/decoder.go
index e5a760a50..4b820792a 100644
--- a/vendor/github.com/ulikunitz/xz/lzma/decoder.go
+++ b/vendor/github.com/ulikunitz/xz/lzma/decoder.go
@@ -200,7 +200,7 @@ func (d *decoder) decompress() error {
 		op, err := d.readOp()
 		switch err {
 		case nil:
-			break
+			// break
 		case errEOS:
 			d.eos = true
 			if !d.rd.possiblyAtEnd() {
diff --git a/vendor/github.com/ulikunitz/xz/lzma/decoderdict.go b/vendor/github.com/ulikunitz/xz/lzma/decoderdict.go
index ba06712b0..dd44e6625 100644
--- a/vendor/github.com/ulikunitz/xz/lzma/decoderdict.go
+++ b/vendor/github.com/ulikunitz/xz/lzma/decoderdict.go
@@ -126,10 +126,3 @@ func (d *decoderDict) Available() int { return d.buf.Available() }
 
 // Read reads data from the buffer contained in the decoder dictionary.
 func (d *decoderDict) Read(p []byte) (n int, err error) { return d.buf.Read(p) }
-
-// Buffered returns the number of bytes currently buffered in the
-// decoder dictionary.
-func (d *decoderDict) buffered() int { return d.buf.Buffered() }
-
-// Peek gets data from the buffer without advancing the rear index.
-func (d *decoderDict) peek(p []byte) (n int, err error) { return d.buf.Peek(p) }
diff --git a/vendor/github.com/ulikunitz/xz/lzma/directcodec.go b/vendor/github.com/ulikunitz/xz/lzma/directcodec.go
index e6e0c6ddf..064642831 100644
--- a/vendor/github.com/ulikunitz/xz/lzma/directcodec.go
+++ b/vendor/github.com/ulikunitz/xz/lzma/directcodec.go
@@ -4,21 +4,10 @@
 
 package lzma
 
-import "fmt"
-
 // directCodec allows the encoding and decoding of values with a fixed number
 // of bits. The number of bits must be in the range [1,32].
 type directCodec byte
 
-// makeDirectCodec creates a directCodec. The function panics if the number of
-// bits is not in the range [1,32].
-func makeDirectCodec(bits int) directCodec {
-	if !(1 <= bits && bits <= 32) {
-		panic(fmt.Errorf("bits=%d out of range", bits))
-	}
-	return directCodec(bits)
-}
-
 // Bits returns the number of bits supported by this codec.
 func (dc directCodec) Bits() int {
 	return int(dc)
diff --git a/vendor/github.com/ulikunitz/xz/lzma/distcodec.go b/vendor/github.com/ulikunitz/xz/lzma/distcodec.go
index 69871c04a..9ed486d27 100644
--- a/vendor/github.com/ulikunitz/xz/lzma/distcodec.go
+++ b/vendor/github.com/ulikunitz/xz/lzma/distcodec.go
@@ -20,8 +20,6 @@ const (
 	posSlotBits = 6
 	// number of align bits
 	alignBits = 4
-	// maximum position slot
-	maxPosSlot = 63
 )
 
 // distCodec provides encoding and decoding of distance values.
@@ -45,20 +43,6 @@ func (dc *distCodec) deepcopy(src *distCodec) {
 	dc.alignCodec.deepcopy(&src.alignCodec)
 }
 
-// distBits returns the number of bits required to encode dist.
-func distBits(dist uint32) int {
-	if dist < startPosModel {
-		return 6
-	}
-	// slot s > 3, dist d
-	// s = 2(bits(d)-1) + bit(d, bits(d)-2)
-	// s>>1 = bits(d)-1
-	// bits(d) = 32-nlz32(d)
-	// s>>1=31-nlz32(d)
-	// n = 5 + (s>>1) = 36 - nlz32(d)
-	return 36 - nlz32(dist)
-}
-
 // newDistCodec creates a new distance codec.
 func (dc *distCodec) init() {
 	for i := range dc.posSlotCodecs {
diff --git a/vendor/github.com/ulikunitz/xz/lzma/encoderdict.go b/vendor/github.com/ulikunitz/xz/lzma/encoderdict.go
index 40f3d3f64..c36308d7c 100644
--- a/vendor/github.com/ulikunitz/xz/lzma/encoderdict.go
+++ b/vendor/github.com/ulikunitz/xz/lzma/encoderdict.go
@@ -19,7 +19,7 @@ type matcher interface {
 }
 
 // encoderDict provides the dictionary of the encoder. It includes an
-// addtional buffer atop of the actual dictionary.
+// additional buffer atop of the actual dictionary.
 type encoderDict struct {
 	buf      buffer
 	m        matcher
diff --git a/vendor/github.com/ulikunitz/xz/lzma/header2.go b/vendor/github.com/ulikunitz/xz/lzma/header2.go
index cd148812c..ffeca35c3 100644
--- a/vendor/github.com/ulikunitz/xz/lzma/header2.go
+++ b/vendor/github.com/ulikunitz/xz/lzma/header2.go
@@ -264,7 +264,7 @@ type chunkState byte
 // state
 const (
 	start chunkState = 'S'
-	stop             = 'T'
+	stop  chunkState = 'T'
 )
 
 // errors for the chunk state handling
diff --git a/vendor/github.com/ulikunitz/xz/lzma/lengthcodec.go b/vendor/github.com/ulikunitz/xz/lzma/lengthcodec.go
index 927395bd8..35b064064 100644
--- a/vendor/github.com/ulikunitz/xz/lzma/lengthcodec.go
+++ b/vendor/github.com/ulikunitz/xz/lzma/lengthcodec.go
@@ -56,19 +56,6 @@ func (lc *lengthCodec) init() {
 	lc.high = makeTreeCodec(8)
 }
 
-// lBits gives the number of bits used for the encoding of the l value
-// provided to the range encoder.
-func lBits(l uint32) int {
-	switch {
-	case l < 8:
-		return 4
-	case l < 16:
-		return 5
-	default:
-		return 10
-	}
-}
-
 // Encode encodes the length offset. The length offset l can be compute by
 // subtracting minMatchLen (2) from the actual length.
 //
diff --git a/vendor/github.com/ulikunitz/xz/lzma/literalcodec.go b/vendor/github.com/ulikunitz/xz/lzma/literalcodec.go
index ca31530fd..7b1ad1d9b 100644
--- a/vendor/github.com/ulikunitz/xz/lzma/literalcodec.go
+++ b/vendor/github.com/ulikunitz/xz/lzma/literalcodec.go
@@ -123,10 +123,3 @@ const (
 	minLP = 0
 	maxLP = 4
 )
-
-// minState and maxState define a range for the state values stored in
-// the State values.
-const (
-	minState = 0
-	maxState = 11
-)
diff --git a/vendor/github.com/ulikunitz/xz/lzma/operation.go b/vendor/github.com/ulikunitz/xz/lzma/operation.go
index a75c9b46c..2f9b78ea5 100644
--- a/vendor/github.com/ulikunitz/xz/lzma/operation.go
+++ b/vendor/github.com/ulikunitz/xz/lzma/operation.go
@@ -5,7 +5,6 @@
 package lzma
 
 import (
-	"errors"
 	"fmt"
 	"unicode"
 )
@@ -24,30 +23,6 @@ type match struct {
 	n int
 }
 
-// verify checks whether the match is valid. If that is not the case an
-// error is returned.
-func (m match) verify() error {
-	if !(minDistance <= m.distance && m.distance <= maxDistance) {
-		return errors.New("distance out of range")
-	}
-	if !(1 <= m.n && m.n <= maxMatchLen) {
-		return errors.New("length out of range")
-	}
-	return nil
-}
-
-// l return the l-value for the match, which is the difference of length
-// n and 2.
-func (m match) l() uint32 {
-	return uint32(m.n - minMatchLen)
-}
-
-// dist returns the dist value for the match, which is one less of the
-// distance stored in the match.
-func (m match) dist() uint32 {
-	return uint32(m.distance - minDistance)
-}
-
 // Len returns the number of bytes matched.
 func (m match) Len() int {
 	return m.n
diff --git a/vendor/github.com/ulikunitz/xz/lzma/rangecodec.go b/vendor/github.com/ulikunitz/xz/lzma/rangecodec.go
index 7189a0377..7b299abfe 100644
--- a/vendor/github.com/ulikunitz/xz/lzma/rangecodec.go
+++ b/vendor/github.com/ulikunitz/xz/lzma/rangecodec.go
@@ -131,32 +131,6 @@ type rangeDecoder struct {
 	code   uint32
 }
 
-// init initializes the range decoder, by reading from the byte reader.
-func (d *rangeDecoder) init() error {
-	d.nrange = 0xffffffff
-	d.code = 0
-
-	b, err := d.br.ReadByte()
-	if err != nil {
-		return err
-	}
-	if b != 0 {
-		return errors.New("newRangeDecoder: first byte not zero")
-	}
-
-	for i := 0; i < 4; i++ {
-		if err = d.updateCode(); err != nil {
-			return err
-		}
-	}
-
-	if d.code >= d.nrange {
-		return errors.New("newRangeDecoder: d.code >= d.nrange")
-	}
-
-	return nil
-}
-
 // newRangeDecoder initializes a range decoder. It reads five bytes from the
 // reader and therefore may return an error.
 func newRangeDecoder(br io.ByteReader) (d *rangeDecoder, err error) {
diff --git a/vendor/github.com/ulikunitz/xz/lzma/reader2.go b/vendor/github.com/ulikunitz/xz/lzma/reader2.go
index 33074e624..e34c23f9c 100644
--- a/vendor/github.com/ulikunitz/xz/lzma/reader2.go
+++ b/vendor/github.com/ulikunitz/xz/lzma/reader2.go
@@ -48,7 +48,6 @@ type Reader2 struct {
 	chunkReader io.Reader
 
 	cstate chunkState
-	ctype  chunkType
 }
 
 // NewReader2 creates a reader for an LZMA2 chunk sequence.
diff --git a/vendor/github.com/ulikunitz/xz/lzma/state.go b/vendor/github.com/ulikunitz/xz/lzma/state.go
index 03f061cf1..fbe3a3942 100644
--- a/vendor/github.com/ulikunitz/xz/lzma/state.go
+++ b/vendor/github.com/ulikunitz/xz/lzma/state.go
@@ -53,12 +53,6 @@ func (s *state) Reset() {
 	s.distCodec.init()
 }
 
-// initState initializes the state.
-func initState(s *state, p Properties) {
-	*s = state{Properties: p}
-	s.Reset()
-}
-
 // newState creates a new state from the give Properties.
 func newState(p Properties) *state {
 	s := &state{Properties: p}
diff --git a/vendor/github.com/ulikunitz/xz/reader.go b/vendor/github.com/ulikunitz/xz/reader.go
index 22cd6d500..795858914 100644
--- a/vendor/github.com/ulikunitz/xz/reader.go
+++ b/vendor/github.com/ulikunitz/xz/reader.go
@@ -26,13 +26,6 @@ type ReaderConfig struct {
 	SingleStream bool
 }
 
-// fill replaces all zero values with their default values.
-func (c *ReaderConfig) fill() {
-	if c.DictCap == 0 {
-		c.DictCap = 8 * 1024 * 1024
-	}
-}
-
 // Verify checks the reader parameters for Validity. Zero values will be
 // replaced by default values.
 func (c *ReaderConfig) Verify() error {
@@ -165,9 +158,6 @@ func (c ReaderConfig) newStreamReader(xz io.Reader) (r *streamReader, err error)
 	return r, nil
 }
 
-// errIndex indicates an error with the xz file index.
-var errIndex = errors.New("xz: error in xz file index")
-
 // readTail reads the index body and the xz footer.
 func (r *streamReader) readTail() error {
 	index, n, err := readIndexBody(r.xz)
@@ -265,7 +255,6 @@ type blockReader struct {
 	n         int64
 	hash      hash.Hash
 	r         io.Reader
-	err       error
 }
 
 // newBlockReader creates a new block reader.
@@ -315,10 +304,6 @@ func (br *blockReader) record() record {
 	return record{br.unpaddedSize(), br.uncompressedSize()}
 }
 
-// errBlockSize indicates that the size of the block in the block header
-// is wrong.
-var errBlockSize = errors.New("xz: wrong uncompressed size for block")
-
 // Read reads data from the block.
 func (br *blockReader) Read(p []byte) (n int, err error) {
 	n, err = br.r.Read(p)
diff --git a/vendor/github.com/ulikunitz/xz/writer.go b/vendor/github.com/ulikunitz/xz/writer.go
index aec10dfa6..a9ed44912 100644
--- a/vendor/github.com/ulikunitz/xz/writer.go
+++ b/vendor/github.com/ulikunitz/xz/writer.go
@@ -6,6 +6,7 @@ package xz
 
 import (
 	"errors"
+	"fmt"
 	"hash"
 	"io"
 
@@ -190,6 +191,9 @@ func (c WriterConfig) NewWriter(xz io.Writer) (w *Writer, err error) {
 		return nil, err
 	}
 	data, err := w.h.MarshalBinary()
+	if err != nil {
+		return nil, fmt.Errorf("w.h.MarshalBinary(): error %w", err)
+	}
 	if _, err = xz.Write(data); err != nil {
 		return nil, err
 	}
-- 
cgit v1.2.3-54-g00ecf