func TestIssue3797(t *testing.T) {
	rex := AuthConfig{
		Username: "rex",
		Password: "tiny arms", // Fake value for testing.
		Email:    "rex@example.com",
	}

	dk := &BasicDockerKeyring{}
	dk.Add(DockerConfig{
		"https://quay.io/v1/": DockerConfigEntry{
			Username: rex.Username,
			Password: rex.Password,
			Email:    rex.Email,
		},
	})

	tests := []struct {

		dataSizeIndex = -1   // index of Group 3 prefix in src and inst.Prefix
		addrSizeIndex = -1   // index of Group 4 prefix in src and inst.Prefix
		rex           Prefix // rex byte if present (or 0)
		rexUsed       Prefix // bits used in rex byte
		rexIndex      = -1   // index of rex byte
		vex           Prefix // use vex encoding
		vexIndex      = -1   // index of vex prefix

		addrMode = mode // address mode (width in bits)

	PrefixXACQUIRE Prefix = 0x1F2
	PrefixBND      Prefix = 0x2F2
	PrefixREP      Prefix = 0xF3 // repeat
	PrefixXRELEASE Prefix = 0x1F3

	// The REX prefixes must be in the range [PrefixREX, PrefixREX+0x10).
	// the other bits are set or not according to the intended use.
	PrefixREX       Prefix = 0x40 // REX 64-bit extension prefix
	PrefixREXW      Prefix = 0x08 // extension bit W (64-bit instruction width)

	// Not necessary in Snow Leopard (si_code will be != 0).
	if GOOS == "darwin" && sig == _SIGFPE && gp.sigcode0 == 0 {
		pc := (*[4]byte)(unsafe.Pointer(gp.sigpc))
		i := 0
		if pc[i]&0xF0 == 0x40 { // 64-bit REX prefix
			i++
		} else if pc[i] == 0x66 { // 16-bit instruction prefix
			i++
		}
		if pc[i] == 0xF6 || pc[i] == 0xF7 {
			gp.sigcode0 = _FPE_INTDIV
		}
	}

	pc := uintptr(c.rip())

	Pq3  = 0x67 // xmm escape 3: 66 48 0f
	Pq4  = 0x68 // xmm escape 4: 66 0F 38
	Pq4w = 0x69 // Pq4 with Rex.w 66 0F 38
	Pq5  = 0x6a // xmm escape 5: F3 0F 38
	Pq5w = 0x6b // Pq5 with Rex.w F3 0F 38
	Pfw  = 0xf4 // Pf3 with Rex.w: f3 48 0f
	Pw   = 0x48 // Rex.w
	Pw8  = 0x90 // symbolic; exact value doesn't matter
	Py   = 0x80 // defaults to 64-bit mode

			break
		}
		if p&PrefixImplicit != 0 {
			continue
		}
		switch p &^ (PrefixIgnored | PrefixInvalid) {
		default:
			if p.IsREX() {
				if p&0xFF == PrefixREX {
					prefix += "rex "
				} else {
					prefix += "rex." + p.String()[4:] + " "
				}
				break
			}
			prefix += strings.ToLower(p.String()) + " "

		case PrefixPN:
			op += ",pn"
			continue

		case PrefixPT:

          } catch (ExecutionException eex) {
            ee = eex;
          } catch (InterruptedException iex) {
            throw iex;
          } catch (Exception rex) { // sneaky checked exception
            ee = new ExecutionException(rex);
          }
        }
      }

      if (ee == null) {
        ee = new ExecutionException(null);
      }
      throw ee;
    } finally {

          } catch (ExecutionException eex) {
            ee = eex;
          } catch (InterruptedException iex) {
            throw iex;
          } catch (Exception rex) { // sneaky checked exception
            ee = new ExecutionException(rex);
          }
        }
      }

      if (ee == null) {
        ee = new ExecutionException(null);
      }
      throw ee;
    } finally {

	"synagogue":                            "\U0001f54d",
	"syria":                                "\U0001f1f8\U0001f1fe",
	"syringe":                              "\U0001f489",
	"t-rex":                                "\U0001f996",
	"taco":                                 "\U0001f32e",
	"tada":                                 "\U0001f389",
	"taiwan":                               "\U0001f1f9\U0001f1fc",

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