BenchmarkChanToSyscallPing1ms-4             ==================
WARNING: DATA RACE
Write by goroutine 284:
  testing.(*B).runN()
      C:/workdir/go/src/testing/benchmark.go:135 +0x81
  testing.(*B).launch()
      C:/workdir/go/src/testing/benchmark.go:260 +0x1a8

Previous read by goroutine 1056:
  runtime_test.benchChanToSyscallPing.func1()
      C:/workdir/go/src/runtime/syscall_windows_test.go:910 +0x47

Goroutine 284 (running) created at:
  testing.(*B).doBench()
      C:/workdir/go/src/testing/benchmark.go:228 +0x7a
  testing.(*benchContext).processBench()
      C:/workdir/go/src/testing/benchmark.go:406 +0x2ca
  testing.(*B).run()
      C:/workdir/go/src/testing/benchmark.go:219 +0xb1
  testing.(*B).Run()
      C:/workdir/go/src/testing/benchmark.go:462 +0x3e9
  testing.runBenchmarksInternal.func1()
      C:/workdir/go/src/testing/benchmark.go:378 +0xa7
  testing.(*B).runN()
      C:/workdir/go/src/testing/benchmark.go:139 +0xf3
  testing.runBenchmarksInternal()
      C:/workdir/go/src/testing/benchmark.go:384 +0x725
  testing.(*M).Run()
      C:/workdir/go/src/testing/testing.go:678 +0x2f3
  runtime_test.TestMain()
      C:/workdir/go/src/runtime/crash_test.go:24 +0x39
  main.main()
      runtime/_test/_testmain.go:1060 +0x1a3

Goroutine 1056 (finished) created at:
  runtime_test.benchChanToSyscallPing()
      C:/workdir/go/src/runtime/syscall_windows_test.go:914 +0xad
  runtime_test.BenchmarkChanToSyscallPing1ms()
      C:/workdir/go/src/runtime/syscall_windows_test.go:926 +0x41
  testing.(*B).runN()
      C:/workdir/go/src/testing/benchmark.go:139 +0xf3
  testing.(*B).run1.func1()
      C:/workdir/go/src/testing/benchmark.go:208 +0x64
==================
     300        498015 ns/op