}

	setupCmd = func(cmd *exec.Cmd) {
		setDir(cmd, filepath.Join(goroot, "src"))
		if len(opts.env) != 0 {
			for _, kv := range opts.env {
				if i := strings.Index(kv, "="); i < 0 {
					unsetEnv(cmd, kv[:len(kv)-1])
				} else {
					setEnv(cmd, kv[:i], kv[i+1:])
				}
			}
		}
		if runOnHost {
			setEnv(cmd, "GOARCH", gohostarch)
			setEnv(cmd, "GOOS", gohostos)
		}
	}

	// disable ENVs which interfere with tests.
	for _, env := range []string{
		crypto.EnvKMSAutoEncryption,
		config.EnvAccessKey,
		config.EnvSecretKey,
		config.EnvRootUser,
		config.EnvRootPassword,
	} {
		os.Unsetenv(env)
	}

	// Set as non-distributed.
	globalIsDistErasure = false

	// Disable printing console messages during tests.
	color.Output = io.Discard
	// Disable Error logging in testing.

		c.Fatalf("cannot set environment variable: %v", err)
	}

	if ok {
		c.Cleanup(func() {
			os.Setenv(key, prevValue)
		})
	} else {
		c.Cleanup(func() {
			os.Unsetenv(key)
		})
	}
}

// panicHandling controls the panic handling used by runCleanup.
type panicHandling int

const (
	normalPanic panicHandling = iota
	recoverAndReturnPanic
)

		{"Stdout", Var, 0},
		{"Symlink", Func, 0},
		{"SyscallError", Type, 0},
		{"SyscallError.Err", Field, 0},
		{"SyscallError.Syscall", Field, 0},
		{"TempDir", Func, 0},
		{"Truncate", Func, 0},
		{"Unsetenv", Func, 4},
		{"UserCacheDir", Func, 11},
		{"UserConfigDir", Func, 13},
		{"UserHomeDir", Func, 12},
		{"WriteFile", Func, 16},
	},
	"os/exec": {
		{"(*Cmd).CombinedOutput", Method, 0},