}
	// len(s) > 2
	if strings.Contains(s, "_") {
		check.versionErrorf(lit, go1_13, "underscore in numeric literal")
		return
	}
	if s[0] != '0' {
		return
	}
	radix := s[1]
	if radix == 'b' || radix == 'B' {
		check.versionErrorf(lit, go1_13, "binary literal")
		return
	}
	if radix == 'o' || radix == 'O' {
		check.versionErrorf(lit, go1_13, "0o/0O-style octal literal")
		return
	}

	}
	// len(s) > 2
	if strings.Contains(s, "_") {
		check.versionErrorf(lit, go1_13, "underscore in numeric literal")
		return
	}
	if s[0] != '0' {
		return
	}
	radix := s[1]
	if radix == 'b' || radix == 'B' {
		check.versionErrorf(lit, go1_13, "binary literal")
		return
	}
	if radix == 'o' || radix == 'O' {
		check.versionErrorf(lit, go1_13, "0o/0O-style octal literal")
		return
	}

				},
			}
		}
		if vers != "" && module.CanonicalVersion(vers) == vers {
			if err := module.CheckPathMajor(vers, pathMajor); err != nil {
				return "", module.VersionError(module.Version{Path: path, Version: vers}, err)
			}
			return vers, nil
		}

		info, err := Query(ctx, path, vers, "", nil)
		if err != nil {
			return "", err
		}