peass-ng/PEASS-ng · error · ParseErrorException

Syntax error at line {0} column {1}

Error message

Syntax error at line {0} column {1}

What it means

The central error reporter of the YamlSerializer parser: Error() formats the message with the current token's line and column and throws ParseErrorException. It is invoked from ErrorUnless/ErrorIf helpers at every grammar decision point, so this message means the YAML input violated the parser grammar at the reported position — effectively 'unexpected token at line/column', with the position supplied by the scanner state.

Source

Thrown at winPEAS/winPEASexe/winPEAS/3rdParty/YamlSerializer/Parser.cs:165

            /// </summary>
            public int Raw; 
            /// <summary>
            /// Column in a text.
            /// </summary>
            public int Column; 
        }
        #endregion

        #region Error / Warning
        /// <summary>
        /// Reporting syntax error by throwing <see cref="ParseErrorException"/>.
        /// </summary>
        /// <param name="message"><see cref="string.Format(string,object[])"/> template for the error message.</param>
        /// <param name="args"><see cref="string.Format(string,object[])"/> parameters if required</param>
        /// <returns>Because it throw exception, nothing will be returned in reality.</returns>
        public bool Error(string message, params object[] args)
        {
            throw new ParseErrorException(
                string.Format("Syntax error at line {0} column {1}\r\n", CurrentPosition.Raw, CurrentPosition.Column) +
                    string.Format(message, args));
        }
        /// <summary>
        /// <para>Give warning if <paramref name="condition"/> is true.</para>
        /// 
        /// <para>By default, the warning will not be shown / stored to anywhere.
        /// To show or log the warning, override <see cref="StoreWarning"/>.</para>
        /// </summary>
        /// <example>
        /// <code>
        ///   return 
        ///       SomeObsoleteReductionRule() &amp;&amp;
        ///       WarningIf(
        ///           context != Context.IndeedObsolete,
        ///           "Obsolete");
        /// </code>
        /// </example>

View on GitHub (pinned to 53fb989abc)

Solutions

1. Fix the YAML syntax at the reported line/column (indentation, missing colon/quote, stray characters)
2. Validate YAML with a linter or YamlSerializer round-trip before shipping
3. Include the ParseErrorException position in user-facing error output to speed correction

When it happens

Trigger: Thrown at winPEAS/winPEASexe/winPEAS/3rdParty/YamlSerializer/Parser.cs:165 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of peass-ng/PEASS-ng@53fb989abc (2026-09-02). Data as JSON: /api/errors/1703907cb90f9018. Report an issue: GitHub.