Data Race in function executors/docker/machine.countIdleMachines() - executors/docker/machine/provider_test.go:173
==================
WARNING: DATA RACE
Read at 0x00c420085748 by goroutine 39:
gitlab.com/gitlab-org/gitlab-runner/executors/docker/machine.countIdleMachines()
/Users/nolith/src/gitlab.com/gitlab-org/gitlab-runner/executors/docker/machine/provider_test.go:173 +0x146
gitlab.com/gitlab-org/gitlab-runner/executors/docker/machine.assertIdleMachines()
/Users/nolith/src/gitlab.com/gitlab-org/gitlab-runner/executors/docker/machine/provider_test.go:183 +0x60
gitlab.com/gitlab-org/gitlab-runner/executors/docker/machine.TestMachinePreCreateMode()
/Users/nolith/src/gitlab.com/gitlab-org/gitlab-runner/executors/docker/machine/provider_test.go:372 +0x483
testing.tRunner()
/usr/local/Cellar/go@1.8/1.8.5/libexec/src/testing/testing.go:657 +0x107
Previous write at 0x00c420085748 by goroutine 40:
gitlab.com/gitlab-org/gitlab-runner/executors/docker/machine.(*machineProvider).create.func1()
/Users/nolith/src/gitlab.com/gitlab-org/gitlab-runner/executors/docker/machine/provider.go:89 +0x7f5
Goroutine 39 (running) created at:
testing.(*T).Run()
/usr/local/Cellar/go@1.8/1.8.5/libexec/src/testing/testing.go:697 +0x543
testing.runTests.func1()
/usr/local/Cellar/go@1.8/1.8.5/libexec/src/testing/testing.go:882 +0xaa
testing.tRunner()
/usr/local/Cellar/go@1.8/1.8.5/libexec/src/testing/testing.go:657 +0x107
testing.runTests()
/usr/local/Cellar/go@1.8/1.8.5/libexec/src/testing/testing.go:888 +0x4e0
testing.(*M).Run()
/usr/local/Cellar/go@1.8/1.8.5/libexec/src/testing/testing.go:822 +0x1c3
main.main()
gitlab.com/gitlab-org/gitlab-runner/executors/docker/machine/_test/_testmain.go:86 +0x20f
Goroutine 40 (running) created at:
gitlab.com/gitlab-org/gitlab-runner/executors/docker/machine.(*machineProvider).create()
/Users/nolith/src/gitlab.com/gitlab-org/gitlab-runner/executors/docker/machine/provider.go:101 +0x2c0
gitlab.com/gitlab-org/gitlab-runner/executors/docker/machine.(*machineProvider).createMachines()
/Users/nolith/src/gitlab.com/gitlab-org/gitlab-runner/executors/docker/machine/provider.go:285 +0x21f
gitlab.com/gitlab-org/gitlab-runner/executors/docker/machine.(*machineProvider).Acquire()
/Users/nolith/src/gitlab.com/gitlab-org/gitlab-runner/executors/docker/machine/provider.go:319 +0x2df
gitlab.com/gitlab-org/gitlab-runner/executors/docker/machine.TestMachinePreCreateMode()
/Users/nolith/src/gitlab.com/gitlab-org/gitlab-runner/executors/docker/machine/provider_test.go:367 +0x202
testing.tRunner()
/usr/local/Cellar/go@1.8/1.8.5/libexec/src/testing/testing.go:657 +0x107
==================