mermaid-js/mermaid · error · Error

Position were undefined for commit ${commit.id}

Error message

Position were undefined for commit ${commit.id}

What it means

Error "Position were undefined for commit ${commit.id}" thrown in mermaid-js/mermaid.

Source

Thrown at packages/mermaid/src/diagrams/git/gitGraphRenderer.ts:555

      const currentPosition = commitPos.get(commit.id) ?? defaultCommitPosition;
      return currentPosition.y - COMMIT_STEP;
    } else {
      return 0;
    }
  }
  return 0;
};

const getCommitPosition = (
  commit: Commit,
  pos: number,
  isParallelCommits: boolean
): CommitPositionOffset => {
  const posWithOffset = dir === 'BT' && isParallelCommits ? pos : pos + LAYOUT_OFFSET;
  const branchY = branchPos.get(commit.branch)?.pos;
  const x = dir === 'TB' || dir === 'BT' ? branchPos.get(commit.branch)?.pos : posWithOffset;
  if (x === undefined || branchY === undefined) {
    throw new Error(`Position were undefined for commit ${commit.id}`);
  }
  const useReduxGeometry = REDUX_GEOMETRY_THEMES.has(getConfig().theme ?? '');
  const y =
    dir === 'TB' || dir === 'BT'
      ? posWithOffset
      : branchY + (useReduxGeometry ? REDUX_BRANCH_LABEL_PADDING_Y / 2 + 1 : -2);
  return { x, y, posWithOffset };
};

const drawCommits = (
  svg: d3.Selection<d3.BaseType, unknown, HTMLElement, any>,
  commits: Map<string, Commit>,
  modifyGraph: boolean,
  gitGraphConfig: GitGraphDiagramConfig
) => {
  const gBullets = svg.append('g').attr('class', 'commit-bullets');
  const gLabels = svg.append('g').attr('class', 'commit-labels');
  let pos = dir === 'TB' || dir === 'BT' ? defaultPos : 0;

View on GitHub (pinned to d93e9c88c0)

When it happens

Trigger: Thrown at packages/mermaid/src/diagrams/git/gitGraphRenderer.ts:555 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/eaa8261e444cd09a. Report an issue: GitHub.