waiter1.interrupt();

    waiter1.join();
    waiter2.awaitWaiting(); // should still be blocked

    LockSupport.unpark(waiter2); // spurious wakeup
    waiter2.awaitWaiting(); // should eventually re-park

    future.set(null);
    waiter2.join();
  }

  public void testRemoveWaiter_polling() throws Exception {

	GOPROXY=proxy.example.com
	GONOPROXY=none

The GOPRIVATE variable is also used to define the "public" and "private"
patterns for the GOVCS variable; see 'go help vcs'. For that usage,
GOPRIVATE applies even in GOPATH mode. In that case, it matches import paths
instead of module paths.

The 'go env -w' command (see 'go help env') can be used to set these variables
for future go command invocations.

func gobuildTestdata(t *testing.T, tdir string, pkgDir string, gcflags string) *builtFile {
	dst := filepath.Join(tdir, "out.exe")

	// Run a build with an updated GOPATH
	cmd := testenv.Command(t, testenv.GoToolPath(t), "build", gcflags, "-o", dst)
	cmd.Dir = pkgDir
	if b, err := cmd.CombinedOutput(); err != nil {
		t.Logf("build: %s\n", b)
		t.Fatalf("build error: %v", err)
	}

        MOVD zero(SB), AX
        MOVD ·zero(SB), AX
        RET
`)
	cmd := testenv.Command(t, testenv.GoToolPath(t), "build")
	cmd.Dir = tmpdir
	cmd.Env = append(os.Environ(),
		"GOARCH=amd64", "GOOS=linux", "GOPATH="+filepath.Join(tmpdir, "_gopath"))
	out, err := cmd.CombinedOutput()
	if err == nil {
		t.Fatalf("expected build to fail, but it succeeded")
	}
	out = regexp.MustCompile("(?m)^#.*\n").ReplaceAll(out, nil)