[Reproducible-builds] Bug#796806: golang-check.v1: Non-determistically FTBFS due to unreliable timing in tests

[Chris Lamb]

Source: golang-check.v1
Version: 0.0+git20150729.11d3bc7-1
Severity: serious
Justification: fails to build from source
User: reproducible-builds at lists.alioth.debian.org
Usertags: ftbfs
X-Debbugs-Cc: reproducible-builds at lists.alioth.debian.org

Dear Maintainer,

golang-check.v1's testsuite appears to use method timing/benchmarking in
such
a way that it will non-deterministically FTBFS:

  [..]

     dh_auto_test -O--buildsystem=golang
  	go test -v gopkg.in/check.v1
  === RUN Test
  
  ----------------------------------------------------------------------
  FAIL: benchmark_test.go:39: BenchmarkS.TestBenchmark
  
  benchmark_test.go:59:
      c.Assert(output.value, Matches, expected)
  ... value string = "PASS: check_test.go:144:
  FixtureHelper.Benchmark1\t      50\t    261765 ns/op\n"
  ... regex string = "PASS: check_test\\.go:[0-9]+:
  FixtureHelper\\.Benchmark1\t *100\t *[12][0-9]{5} ns/op\n"
  
  
  ----------------------------------------------------------------------
  FAIL: benchmark_test.go:62: BenchmarkS.TestBenchmarkBytes
  
  benchmark_test.go:74:
      c.Assert(output.value, Matches, expected)
  ... value string = "PASS: check_test.go:151:
  FixtureHelper.Benchmark2\t      50\t    346352 ns/op\t   2.96 MB/s\n"
  ... regex string = "PASS: check_test\\.go:[0-9]+:
  FixtureHelper\\.Benchmark2\t *100\t *[12][0-9]{5} ns/op\t
  *[4-9]\\.[0-9]{2} MB/s\n"
  
  OOPS: 125 passed, 2 FAILED
  --- FAIL: Test (0.46s)
  FAIL
  exit status 1
  FAIL    gopkg.in/check.v1       0.469s
  dh_auto_test: go test -v gopkg.in/check.v1 returned exit code 1
  debian/rules:7: recipe for target 'build' failed
  make: *** [build] Error 1
  dpkg-buildpackage: error: debian/rules build gave error exit status 2

  [..]

The full build log is attached or can be viewed here:

    https://reproducible.debian.net/logs/unstable/amd64/golang-check.v1_0.0+git20150729.11d3bc7-1.build1.log.gz


Regards,

-- 
      ,''`.
     : :'  :     Chris Lamb
     `. `'`      lamby at debian.org / chris-lamb.co.uk
       `-
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