message The message of the exception raised. source_lines The lines before, after, and including the line the exception occurred on. line The line number the exception occurred on. before, during, after The line the exception occurred on split into three parts: 1. The content before the token that raised the error. 2. The token that raised the error. 3. The content after the token that raised the error. total The number of lines in source_lines. top The line number where source_lines starts. bottom The line number where source_lines ends. start The start position of the token in the template source. end The end position of the token in the template source.