hexo: YAMLException: Specified list of YAML types (or a single Type object) contains a non-Type object.

I upgraded my hexo dependencies:

 hexo                       ^6.0.0  →  ^6.1.0                                                                                                                                                                                                
 hexo-renderer-markdown-it  ^5.0.0  →  ^6.0.1                                                                                                                                                                                                
 hexo-server                ^2.0.0  →  ^3.0.0

Check List

• I have already read Docs page & Troubleshooting page
• I have already searched existing issues and they are not help to me
• I examined error or warning messages and it’s difficult to solve
• Using the latest version of Hexo (run hexo version to check)
• Node.js is higher than minimum required version

Expected behavior

Normal generation with hexo g.

Actual behavior

$ hexo g
YAMLException: Specified list of YAML types (or a single Type object) contains a non-Type object.
    at /home/noraj/Dev/hackdoc/node_modules/hexo/node_modules/js-yaml/lib/schema.js:104:13
    at Array.forEach (<anonymous>)
    at Schema.extend (/home/noraj/Dev/hackdoc/node_modules/hexo/node_modules/js-yaml/lib/schema.js:102:12)
    at Object.<anonymous> (/home/noraj/Dev/hackdoc/node_modules/hexo/lib/plugins/renderer/yaml.js:5:36)
    at Module._compile (node:internal/modules/cjs/loader:1097:14)
    at Object.Module._extensions..js (node:internal/modules/cjs/loader:1151:10)
    at Module.load (node:internal/modules/cjs/loader:975:32)
    at Function.Module._load (node:internal/modules/cjs/loader:822:12)
    at Module.require (node:internal/modules/cjs/loader:999:19)
    at require (node:internal/modules/cjs/helpers:102:18)
    at module.exports (/home/noraj/Dev/hackdoc/node_modules/hexo/lib/plugins/renderer/index.js:15:16)
    at Hexo.init (/home/noraj/Dev/hackdoc/node_modules/hexo/lib/hexo/index.js:235:35)
    at /home/noraj/.asdf/installs/nodejs/17.5.0/.npm/lib/node_modules/hexo-cli/lib/hexo.js:49:17
    at tryCatcher (/home/noraj/.asdf/installs/nodejs/17.5.0/.npm/lib/node_modules/hexo-cli/node_modules/bluebird/js/release/util.js:16:23)
    at Promise._settlePromiseFromHandler (/home/noraj/.asdf/installs/nodejs/17.5.0/.npm/lib/node_modules/hexo-cli/node_modules/bluebird/js/release/promise.js:547:31)
    at Promise._settlePromise (/home/noraj/.asdf/installs/nodejs/17.5.0/.npm/lib/node_modules/hexo-cli/node_modules/bluebird/js/release/promise.js:604:18)
    at Promise._settlePromise0 (/home/noraj/.asdf/installs/nodejs/17.5.0/.npm/lib/node_modules/hexo-cli/node_modules/bluebird/js/release/promise.js:649:10)
    at Promise._settlePromises (/home/noraj/.asdf/installs/nodejs/17.5.0/.npm/lib/node_modules/hexo-cli/node_modules/bluebird/js/release/promise.js:729:18)
    at _drainQueueStep (/home/noraj/.asdf/installs/nodejs/17.5.0/.npm/lib/node_modules/hexo-cli/node_modules/bluebird/js/release/async.js:93:12)
    at _drainQueue (/home/noraj/.asdf/installs/nodejs/17.5.0/.npm/lib/node_modules/hexo-cli/node_modules/bluebird/js/release/async.js:86:9)
    at Async._drainQueues (/home/noraj/.asdf/installs/nodejs/17.5.0/.npm/lib/node_modules/hexo-cli/node_modules/bluebird/js/release/async.js:102:5)
    at Immediate.Async.drainQueues [as _onImmediate] (/home/noraj/.asdf/installs/nodejs/17.5.0/.npm/lib/node_modules/hexo-cli/node_modules/bluebird/js/release/async.js:15:14) {
  reason: 'Specified list of YAML types (or a single Type object) contains a non-Type object.',
  mark: undefined
}

It seems this line triggers it:

https://github.com/nodeca/js-yaml/blob/49baadd52af887d2991e2c39a6639baa56d6c71b/lib/schema.js#L104

How to reproduce?

I’m not able to create a minimal reproducible environment. It’s especially hard since the error message doesn’t tell me which file triggers the error. So I create a private repository with my code by I can only add user one by one as collaborator and not the whole hexojs/core team at once. So please ask me access and I’ll add you.

• hexo g

Is the problem still there under “Safe mode”?

Yes it is a dependency of hexo core

$ hexo --safe                                                                                                                                                                                                                              
FATAL YAMLException: Specified list of YAML types (or a single Type object) contains a non-Type object.
    at /home/noraj/Dev/hackdoc/node_modules/hexo/node_modules/js-yaml/lib/schema.js:104:13
    at Array.forEach (<anonymous>)
    at Schema.extend (/home/noraj/Dev/hackdoc/node_modules/hexo/node_modules/js-yaml/lib/schema.js:102:12)
    at Object.<anonymous> (/home/noraj/Dev/hackdoc/node_modules/hexo/lib/plugins/renderer/yaml.js:5:36)
    at Module._compile (node:internal/modules/cjs/loader:1097:14)
    at Object.Module._extensions..js (node:internal/modules/cjs/loader:1151:10)
    at Module.load (node:internal/modules/cjs/loader:975:32)
    at Function.Module._load (node:internal/modules/cjs/loader:822:12)
    at Module.require (node:internal/modules/cjs/loader:999:19)
    at require (node:internal/modules/cjs/helpers:102:18)
    at module.exports (/home/noraj/Dev/hackdoc/node_modules/hexo/lib/plugins/renderer/index.js:15:16)
    at Hexo.init (/home/noraj/Dev/hackdoc/node_modules/hexo/lib/hexo/index.js:235:35)
    at /home/noraj/.asdf/installs/nodejs/17.5.0/.npm/lib/node_modules/hexo-cli/lib/hexo.js:49:17
    at tryCatcher (/home/noraj/.asdf/installs/nodejs/17.5.0/.npm/lib/node_modules/hexo-cli/node_modules/bluebird/js/release/util.js:16:23)
    at Promise._settlePromiseFromHandler (/home/noraj/.asdf/installs/nodejs/17.5.0/.npm/lib/node_modules/hexo-cli/node_modules/bluebird/js/release/promise.js:547:31)
    at Promise._settlePromise (/home/noraj/.asdf/installs/nodejs/17.5.0/.npm/lib/node_modules/hexo-cli/node_modules/bluebird/js/release/promise.js:604:18)
    at Promise._settlePromise0 (/home/noraj/.asdf/installs/nodejs/17.5.0/.npm/lib/node_modules/hexo-cli/node_modules/bluebird/js/release/promise.js:649:10)
    at Promise._settlePromises (/home/noraj/.asdf/installs/nodejs/17.5.0/.npm/lib/node_modules/hexo-cli/node_modules/bluebird/js/release/promise.js:729:18)
    at _drainQueueStep (/home/noraj/.asdf/installs/nodejs/17.5.0/.npm/lib/node_modules/hexo-cli/node_modules/bluebird/js/release/async.js:93:12)
    at _drainQueue (/home/noraj/.asdf/installs/nodejs/17.5.0/.npm/lib/node_modules/hexo-cli/node_modules/bluebird/js/release/async.js:86:9)
    at Async._drainQueues (/home/noraj/.asdf/installs/nodejs/17.5.0/.npm/lib/node_modules/hexo-cli/node_modules/bluebird/js/release/async.js:102:5)
    at Immediate.Async.drainQueues [as _onImmediate] (/home/noraj/.asdf/installs/nodejs/17.5.0/.npm/lib/node_modules/hexo-cli/node_modules/bluebird/js/release/async.js:15:14) {
  reason: 'Specified list of YAML types (or a single Type object) contains a non-Type object.',
  mark: undefined
}

Environment & Settings

Node.js & npm version(node -v && npm -v)

v17.5.0
8.4.1

Your site _config.yml (Optional)

# Hexo Configuration
## Docs: https://hexo.io/docs/configuration.html
## Source: https://github.com/hexojs/hexo/

# Site
title: title
subtitle: 'Documentation system'
description: 'static documentation site generator'
keywords:
  - documentation
  - markdown
  - custom
  - staticgen
author: John Doe
language: en
timezone: ''

# URL
## If your site is put in a subdirectory, set url as 'http://yoursite.com/child' and root as '/child/'
url: http://yoursite.com
root: /root/
permalink: :year/:month/:day/:title/
permalink_defaults:
pretty_urls:
  trailing_index: true # Set to false to remove trailing index.html from permalinks

# Directory
source_dir: source
public_dir: public
tag_dir: tags
archive_dir: archives
category_dir: categories
code_dir: downloads/code
i18n_dir: :lang
skip_render:

# Writing
new_post_name: :title.md # File name of new posts
default_layout: post
titlecase: false # Transform title into titlecase
external_link:
  enable: true # Open external links in new tab
  field: site # Apply to the whole site
  exclude: ''
filename_case: 0
render_drafts: false
post_asset_folder: false
relative_link: false
future: true
highlight:
  enable: false
prismjs:
  enable: false

# Home page setting
# path: Root path for your blogs index page. (default = '')
# per_page: Posts displayed per page. (0 = disable pagination)
# order_by: Posts order. (Order by date descending by default)
index_generator:
  path: ''
  per_page: 10
  order_by: -date

# Category & Tag
default_category: uncategorized
category_map:
tag_map:

# Metadata elements
## https://developer.mozilla.org/en-US/docs/Web/HTML/Element/meta
meta_generator: true

# Date / Time format
## Hexo uses Moment.js to parse and display date
## You can customize the date format as defined in
## http://momentjs.com/docs/#/displaying/format/
date_format: YYYY-MM-DD
time_format: HH:mm:ss
## Use post's date for updated date unless set in front-matter
updated_option: empty

# Pagination
## Set per_page to 0 to disable pagination
per_page: 10
pagination_dir: page

# Include / Exclude file(s)
## include:/exclude: options only apply to the 'source/' folder
include:
exclude:
ignore:

# Extensions
## Plugins: https://hexo.io/plugins/
## Themes: https://hexo.io/themes/
theme: hackdoc

# Deployment
## Docs: https://hexo.io/docs/deployment.html
deploy:
  type: ''

markdown:
  render:
    html: true
    xhtmlOut: false
    langPrefix: 'lang-'
    breaks: false
    linkify: true
    typographer: false
    quotes: '“”‘’'
  plugins:
  anchors:
    level: 2
    collisionSuffix: '-'
    permalink: true,
    permalinkClass: 'header-anchor'
    permalinkSide: 'right'
    permalinkSymbol: '#'
    case: 0
    separator: '-'

jsonContent:
  meta: false
  drafts: false
  file: content.json
  keywords: undefined
  dateFormat: undefined
  pages:
    title: true
    slug: true
    date: false
    updated: false
    comments: false
    path: true
    link: true
    permalink: true
    excerpt: false
    keywords: false
    text: true
    raw: false
    content: false
    author: false
  posts:
    title: true
    slug: true
    date: false
    updated: false
    comments: false
    path: true
    link: false
    permalink: true
    excerpt: false
    keywords: false
    text: true
    raw: false
    content: false
    author: false
    categories: true
    tags: true

Your theme _config.yml

Changing the theme to landscape still triggers the error so it’s not from my theme.

# Bulmaswatch theme/skin variant/style
# see available values https://jenil.github.io/bulmaswatch/
bulmaswatch: default # cerulean, cosmo, cyborg, darkly, default, flatly, journal, litera, lumen, lux, materia, minty, nuclear, pulse, sandstone, simplex, slate, solar, spacelab, superhero, united, yeti

# Highlight.js style
# see available values https://highlightjs.org/static/demo/
hljs: atom-one-dark # a11y-dark, a11y-light, agate, androidstudio, an-old-hope, arduino-light, arta, ascetic, atelier-cave-dark, atelier-cave-light, atelier-dune-dark, atelier-dune-light, atelier-estuary-dark, atelier-estuary-light, atelier-forest-dark, atelier-forest-light, atelier-heath-dark, atelier-heath-light, atelier-lakeside-dark, atelier-lakeside-light, atelier-plateau-dark, atelier-plateau-light, atelier-savanna-dark, atelier-savanna-light, atelier-seaside-dark, atelier-seaside-light, atelier-sulphurpool-dark, atelier-sulphurpool-light, atom-one-dark, atom-one-dark-reasonable, atom-one-light, brown-paper, codepen-embed, color-brewer, darcula, dark, darkula, default, docco, dracula, far, foundation, github, github-gist, gml, googlecode, grayscale, gruvbox-dark, gruvbox-light, hopscotch, hybrid, idea, ir-black, isbl-editor-dark, isbl-editor-light, kimbie.dark, kimbie.light, lightfair, magula, mono-blue, monokai, monokai-sublime, night-owl, nord, obsidian, ocean, paraiso-dark, paraiso-light, pojoaque, purebasic, qtcreator_dark, qtcreator_light, railscasts, rainbow, routeros, school-book, shades-of-purple, solarized-dark, solarized-light, sunburst, tomorrow, tomorrow-night-blue, tomorrow-night-bright, tomorrow-night, tomorrow-night-eighties, vs2015, vs, xcode, xt256, zenburn

# Navbar at the top or the bottom
navbar:
  position: top # top, bottom
  title: true # display the title in navbar or not

toc: true # enable Table of Content (right bar)

logo:
  path: '/images/hackdoc_512.svg'
  navbar: true # display logo in the navbar (menu)
  sidebar: true # display logo in the sidebar

favicon:
  path: '/images/hackdoc_32.ico'

archive:
  style: 'both' # list, timeline, both

# Sass rendering options
node_sass:
  outputStyle: compressed
  precision: 5
  sourceComments: false

Hexo and Plugin version(npm ls --depth 0)

hexo-site@0.0.0 /home/noraj/Dev/hackdoc
├── hexo-description@0.1.0
├── hexo-excerpt-block@1.0.0
├── hexo-generator-archive@1.0.0
├── hexo-generator-category@1.0.0
├── hexo-generator-feed@3.0.0
├── hexo-generator-index@2.0.0
├── hexo-generator-json-content@4.2.3
├── hexo-generator-tag@1.0.0
├── hexo-multiauthor@0.0.1
├── hexo-render-pug@2.1.4
├── hexo-renderer-markdown-it@6.0.1
├── hexo-renderer-sass@0.4.0
├── hexo-server@3.0.0
├── hexo-spoiler@1.7.3
├── hexo-tag-admonition@1.2.0
├── hexo-tag-asciinema@0.0.3
├── hexo-tag-color-block@0.0.3
├── hexo-tag-kbd@0.0.1
├── hexo-tag-qrcode@1.0.0
└── hexo@6.1.0

Your package.json package.json

{
  "name": "hexo-site",
  "version": "0.0.0",
  "private": true,
  "scripts": {
    "build": "hexo generate",
    "clean": "hexo clean",
    "deploy": "hexo deploy",
    "server": "hexo server"
  },
  "hexo": {
    "version": "6.0.0"
  },
  "dependencies": {
    "hexo": "^6.1.0",
    "hexo-description": "^0.1.0",
    "hexo-excerpt-block": "^1.0.0",
    "hexo-generator-archive": "^1.0.0",
    "hexo-generator-category": "^1.0.0",
    "hexo-generator-feed": "^3.0.0",
    "hexo-generator-index": "^2.0.0",
    "hexo-generator-json-content": "^4.2.3",
    "hexo-generator-tag": "^1.0.0",
    "hexo-multiauthor": "^0.0.1",
    "hexo-render-pug": "^2.1.4",
    "hexo-renderer-markdown-it": "^6.0.1",
    "hexo-renderer-sass": "^0.4.0",
    "hexo-server": "^3.0.0",
    "hexo-spoiler": "^1.7.3",
    "hexo-tag-admonition": "^1.2.0",
    "hexo-tag-asciinema": "0.0.3",
    "hexo-tag-color-block": "0.0.3",
    "hexo-tag-kbd": "0.0.1",
    "hexo-tag-qrcode": "^1.0.0"
  }
}