=== RUN   TestPipeline
==================
WARNING: DATA RACE
Write at 0x00c420092094 by goroutine 7:
  sync/atomic.AddInt32()
      /usr/local/Cellar/go/1.10.3/libexec/src/runtime/race_amd64.s:269 +0xb
  coursera/hw2_signer.TestPipeline.func2()
      /Users/sokolov/go/src/coursera/hw2_signer/main_test.go:38 +0x69

--- FAIL: TestPipeline (0.00s)
Previous read at 0x00c420092094 by goroutine 6:
  coursera/hw2_signer.TestPipeline()
      /Users/sokolov/go/src/coursera/hw2_signer/main_test.go:43 +0x246
  testing.tRunner()
      /usr/local/Cellar/go/1.10.3/libexec/src/testing/testing.go:777 +0x16d

    main_test.go:44: no value free flow - dont collect them
Goroutine 7 (running) created at:
  coursera/hw2_signer.ExecuteJob()
      /Users/sokolov/go/src/coursera/hw2_signer/signer.go:17 +0x54
  coursera/hw2_signer.ExecutePipeline()
      /Users/sokolov/go/src/coursera/hw2_signer/signer.go:14 +0x10e
  coursera/hw2_signer.TestPipeline()
      /Users/sokolov/go/src/coursera/hw2_signer/main_test.go:42 +0x1d3
  testing.tRunner()
      /usr/local/Cellar/go/1.10.3/libexec/src/testing/testing.go:777 +0x16d

Goroutine 6 (running) created at:
  testing.(*T).Run()
      /usr/local/Cellar/go/1.10.3/libexec/src/testing/testing.go:824 +0x564
  testing.runTests.func1()
      /usr/local/Cellar/go/1.10.3/libexec/src/testing/testing.go:1063 +0xa4
  testing.tRunner()
      /usr/local/Cellar/go/1.10.3/libexec/src/testing/testing.go:777 +0x16d
  testing.runTests()
      /usr/local/Cellar/go/1.10.3/libexec/src/testing/testing.go:1061 +0x4e1
  testing.(*M).Run()
      /usr/local/Cellar/go/1.10.3/libexec/src/testing/testing.go:978 +0x2cd
  main.main()
      _testmain.go:44 +0x22a
==================