[Bug 1972735] [NEW] "go test archive/zip" fails, gophercolor16x16.png wrong size

[Dan Kegel]

Public bug reported:

Go's test suite shows a problem:

$ go test archive/zip
--- FAIL: TestReader (0.06s)
    --- FAIL: TestReader/test.zip (0.00s)
        reader_test.go:675: gophercolor16x16.png: len=785, want 664
    --- FAIL: TestReader/test-trailing-junk.zip (0.00s)
        reader_test.go:675: gophercolor16x16.png: len=785, want 664
FAIL
FAIL    archive/zip     26.182s
FAIL

The source for the test shows that it is comparing the size of the file 
/usr/share/go-1.18/src/archive/zip/testdata/gophercolor16x16.png
to the size of the same file inside the archive test.zip in the same directory:

$ ls -l /usr/share/go-1.18/src/archive/zip/testdata/gophercolor16x16.png
-rw-r--r-- 1 root root 664 Apr 13 14:52 
/usr/share/go-1.18/src/archive/zip/testdata/gophercolor16x16.png


$ unzip -v /usr/share/go-1.18/src/archive/zip/testdata/test.zip
...
     785  Stored      785   0% 2010-09-04 22:52 54d531fe  gophercolor16x16.png

The same file in the upstream tarball,
http://archive.ubuntu.com/ubuntu/pool/main/g/golang-1.18/golang-1.18_1.18.1.orig.tar.gz
has the expected size:

$ tar -tvf golang-1.18_1.18.1.orig.tar.gz | grep gophercolor
-rw-r--r-- root/root       785 2022-04-12 08:42 
go/src/archive/zip/testdata/gophercolor16x16.png

The file appears to be installed correctly per dpkg:

$ grep gophercolor /var/lib/dpkg/info/golang-1.18-src.md5sums
75631d6d103ce71fe8d58aff2386c4a4  
usr/share/go-1.18/src/archive/zip/testdata/gophercolor16x16.png

$ md5sum /usr/share/go-1.18/src/archive/zip/testdata/gophercolor16x16.png
75631d6d103ce71fe8d58aff2386c4a4  
/usr/share/go-1.18/src/archive/zip/testdata/gophercolor16x16.png

Where in the packaging pipeline did the file become smaller?

ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: golang-1.18-src 1.18.1-1ubuntu1
ProcVersionSignature: Ubuntu 5.15.0-27.28-generic 5.15.30
Uname: Linux 5.15.0-27-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu82
Architecture: amd64
CasperMD5CheckResult: unknown
CurrentDesktop: ubuntu:GNOME
Date: Mon May  9 14:29:13 2022
Dependencies:
 
InstallationDate: Installed on 2020-10-17 (569 days ago)
InstallationMedia: Ubuntu 20.04.1 LTS "Focal Fossa" - Release amd64 (20200731)
PackageArchitecture: all
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: golang-1.18
UpgradeStatus: Upgraded to jammy on 2022-05-01 (8 days ago)

** Affects: golang-1.18 (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug jammy

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Title:
  "go test archive/zip" fails, gophercolor16x16.png wrong size

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