jackwener/OpenCLI · error · CommandExecutionError

Pixiv novel returned malformed series title

Error message

Pixiv novel returned malformed series title

What it means

novelRowFromBody validates that a non-empty seriesTitle (from b.seriesTitle or seriesNavData.title) is a string. If it is a number, object, or array, the row builder refuses to emit a corrupted title column and throws CommandExecutionError.

Source

Thrown at clis/pixiv/novel.js:42

  }
  return { payload: body, identity: { novelId, title, userName, userId } };
}

export function novelRowFromBody(body, id) {
  const normalized = requireNovelBody(body, id);
  const b = normalized.payload;
  const identity = normalized.identity;
  if (b.seriesNavData != null && (Array.isArray(b.seriesNavData) || typeof b.seriesNavData !== 'object')) {
    throw new CommandExecutionError('Pixiv novel returned malformed series metadata');
  }
  const series = b.seriesNavData || {};
  const seriesId = b.seriesId ?? series.seriesId ?? '';
  const seriesTitle = b.seriesTitle ?? series.title ?? '';
  if (seriesId !== '' && !/^\d+$/.test(String(seriesId))) {
    throw new CommandExecutionError('Pixiv novel returned malformed series ID');
  }
  if (seriesTitle !== '' && typeof seriesTitle !== 'string') {
    throw new CommandExecutionError('Pixiv novel returned malformed series title');
  }
  const seriesOrder = series.order ?? b.seriesContentOrder ?? '';
  if (seriesOrder !== '' && (!Number.isSafeInteger(seriesOrder) || seriesOrder < 1)) {
    throw new CommandExecutionError('Pixiv novel returned malformed series order');
  }
  return {
    novel_id: identity.novelId,
    title: identity.title,
    author: identity.userName,
    user_id: identity.userId,
    series_id: seriesId === '' ? '' : String(seriesId),
    series_title: seriesTitle || '',
    series_order: seriesOrder,
    words: optionalCount(b.wordCount, 'word count'),
    characters: optionalCount(b.characterCount ?? b.textCount, 'character count'),
    bookmarks: optionalCount(b.bookmarkCount, 'bookmark count') || 0,
    likes: optionalCount(b.likeCount, 'like count') || 0,
    views: optionalCount(b.viewCount, 'view count') || 0,

View on GitHub (pinned to 49907e53dc)

Solutions

1. Dump the response to see the actual type of seriesNavData.title
2. If title is a localized object, pick one locale (e.g. .title || .en || .ja) and pass a plain string as seriesTitle
3. Update to the newest CLI version that may already unwrap localized titles
4. Fix upstream normalization code so seriesTitle is always a string or ''

Example fix

// before
const row = novelRowFromBody(body, id); // title is {en: "...", ja: "..."}
// after
const t = body.seriesNavData?.title;
if (t && typeof t === 'object') body.seriesTitle = t.en ?? t.ja ?? '';
const row = novelRowFromBody(body, id);

const t = body?.seriesNavData?.title;
if (t != null && t !== '' && typeof t !== 'string') {
  throw new Error('series title is not a string');
}

function isNonEmptyString(v) {
  return typeof v === 'string' && v.length > 0;
}

try {
  const row = novelRowFromBody(body, id);
} catch (e) {
  if (e.message.includes('malformed series title')) {
    const t = body.seriesNavData?.title;
    body.seriesTitle = typeof t === 'object' ? (t.en ?? t.ja ?? '') : '';
  } else throw e;
}

When it happens

Trigger: seriesTitle resolves to a non-string non-empty value — e.g. seriesNavData.title is an object containing localized variants {en, ja}, or seriesTitle was set to a number in a crafted/cached body.

Common situations: Pixiv experiments with localized title objects; third-party API mirrors return title as {raw:...}; test fixtures typed incorrectly; a custom normalization step assigned the wrong field.

Understand the failure class

• Parsing and encoding errors: unexpected token, malformed input — why parsers reject input and how to find the real culprit.

Related errors

• Pixiv novel returned malformed series order
• ${label} must be an integer between ${min} and ${max}, got $
• Pixiv image download returned unexpected content type for ${
• Pixiv cookie lookup returned malformed entries: ${error?.mes
• Invalid bookmark type: ${type}. Expected "illust" or "novel"

AI-assisted analysis of jackwener/OpenCLI@49907e53dc (2026-08-29). Data as JSON: /api/errors/3297500a91ad3b03. Report an issue: GitHub.