==================
WARNING: DATA RACE
Write by goroutine 83:
  testing.(*B).runN()
      C:/workdir/go/src/testing/benchmark.go:120 +0x83
  testing.(*B).launch()
      C:/workdir/go/src/testing/benchmark.go:216 +0x1c1

Previous read by goroutine 1055:
  runtime_test.BenchmarkChanPopular.func1()
      C:/workdir/go/src/runtime/chan_test.go:905 +0x58

Goroutine 83 (running) created at:
  testing.(*B).run()
      C:/workdir/go/src/testing/benchmark.go:179 +0x6b
  testing.RunBenchmarks()
      C:/workdir/go/src/testing/benchmark.go:332 +0xa19
  testing.(*M).Run()
      C:/workdir/go/src/testing/testing.go:501 +0x2a6
  main.main()
      runtime/_test/_testmain.go:850 +0x219

Goroutine 1055 (finished) created at:
  runtime_test.BenchmarkChanPopular()
      C:/workdir/go/src/runtime/chan_test.go:911 +0x1e7
  testing.(*B).runN()
      C:/workdir/go/src/testing/benchmark.go:124 +0xf9
  testing.(*B).launch()
      C:/workdir/go/src/testing/benchmark.go:199 +0x86
==================