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)

			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 {