error UNHANDLED EXCEPTION TypeError: node.frontmatter.tags.m ap is not a function

[twhite96]

I get this error when trying to import posts that I have from jekyll. According the Gatsby, this happens because not all the tags generated are arrays. Can you see what's up?

https://github.com/twhite96/TWBlog-newish

Nothing has changed but me adding posts.

System info:

  System:
    OS: macOS 10.14.1
    CPU: x64 Intel(R) Core(TM) i5-6500 CPU @ 3.20GHz
    Shell: 5.3 - /bin/zsh
  Binaries:
    Node: 10.12.0 - ~/.nvm/versions/node/v10.12.0/bin/node
    Yarn: 1.10.1 - /usr/local/bin/yarn
    npm: 6.4.1 - ~/.nvm/versions/node/v10.12.0/bin/npm
  Browsers:
    Firefox: 62.0.3
    Safari: 12.0.1
  npmPackages:
    gatsby: ^1.9.164 => 1.9.279
    gatsby-link: ^1.6.34 => 1.6.46
    gatsby-plugin-catch-links: ^1.0.14 => 1.0.26
    gatsby-plugin-feed: ^1.3.15 => 1.3.25
    gatsby-plugin-google-analytics: ^1.0.15 => 1.0.31
    gatsby-plugin-google-fonts: latest => 0.0.4
    gatsby-plugin-offline: ^1.0.12 => 1.0.18
    gatsby-plugin-postcss-sass: ^1.0.15 => 1.0.22
    gatsby-plugin-react-helmet: ^2.0.3 => 2.0.11
    gatsby-plugin-sharp: ^1.6.25 => 1.6.48
    gatsby-plugin-sitemap: ^1.2.10 => 1.2.25
    gatsby-remark-copy-linked-files: ^1.5.25 => 1.5.37
    gatsby-remark-images: ^1.5.37 => 1.5.67
    gatsby-remark-prismjs: ^1.2.12 => 1.2.24
    gatsby-remark-responsive-iframe: ^1.4.16 => 1.4.20
    gatsby-remark-smartypants: ^1.4.10 => 1.4.12
    gatsby-source-filesystem: ^1.5.11 => 1.5.39
    gatsby-transformer-remark: ^1.7.28 => 1.7.44
    gatsby-transformer-sharp: ^1.6.16 => 1.6.27

[alxshelepenok]

Hello @twhite96 I am closing this issue since the gatsby-starter-lumen has been updated.