mermaid-js/mermaid · error · Error

Failed to find a valid date that was not excluded by `exclud

Error message

Failed to find a valid date that was not excluded by `excludes` after 10,000 iterations.

What it means

Error "Failed to find a valid date that was not excluded by `excludes` after 10,000 iterations." thrown in mermaid-js/mermaid.

Source

Thrown at packages/mermaid/src/diagrams/gantt/ganttDb.js:280

 * @param {string[]} excludes - Dates or days to exclude.
 * @param {string[]} includes - Dates to always include, even if they match the excludes.
 * @returns {[endTime: dayjs.Dayjs, renderEndTime: Date | null]} The new `endTime`, and the end time to render.
 * `renderEndTime` may be `null` if `startTime` is newer than `endTime`.
 * @throws {Error} If a valid end time cannot be found after 10,000 iterations.
 */
const fixTaskDates = function (startTime, endTime, dateFormat, excludes, includes) {
  let invalid = false;
  let renderEndTime = null;
  const maxEndTime = endTime.add(10000, 'd');
  while (startTime <= endTime) {
    if (!invalid) {
      renderEndTime = endTime.toDate();
    }
    invalid = isInvalidDate(startTime, dateFormat, excludes, includes);
    if (invalid) {
      endTime = endTime.add(1, 'd');
      if (endTime > maxEndTime) {
        throw new Error(
          'Failed to find a valid date that was not excluded by `excludes` after 10,000 iterations.'
        );
      }
    }
    startTime = startTime.add(1, 'd');
  }
  return [endTime, renderEndTime];
};

const getStartDate = function (prevTime, dateFormat, str) {
  str = str.trim();

  // Helper function to check if format is a timestamp format (x or X)
  const isTimestampFormat = (format) => {
    const trimmedFormat = format.trim();
    return trimmedFormat === 'x' || trimmedFormat === 'X';
  };

View on GitHub (pinned to d93e9c88c0)

When it happens

Trigger: Thrown at packages/mermaid/src/diagrams/gantt/ganttDb.js:280 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of mermaid-js/mermaid@d93e9c88c0 (2026-08-12). Data as JSON: /api/errors/69438723bb41f586. Report an issue: GitHub.