After reinstalling all npm modules without yarn.lock

Description

I reinstalled all npm modules without yarn.lock and got this error. In the demo-repo I saved yarn.lock that breaks build. Also I added yarn.lock.nice with which build works fine.

gatsby build returns the following error:

 ERROR #85910  GRAPHQL

Multiple "root" queries found: "yQuery" and "BlogPostBySlug".
Only the first ("BlogPostBySlug") will be registered.

Instead of:

   1 | query BlogPostBySlug {
   2 |   allMarkdownRemark {
   3 |     #...
   4 |   }
   5 | }
   6 | 
   7 | query yQuery {
   8 |   site {
   9 |     #...
  10 |   }
  11 | }

Do:

  1 | query yQueryAndBlogPostBySlug {
  2 |   allMarkdownRemark {
  3 |     #...
  4 |   }
  5 |   site {
  6 |     #...
  7 |   }
  8 | }

This can happen when you use two page/static queries in one file. Please combine those into one query.
If you're defining multiple components (each with a static query) in one file, you'll need to move each component to its own file.

File: src/templates/blog-post.tsx

Steps to reproduce

I’ve prepared demo repo After clonning do the following steps: yarn install gatsby build

Expected result

build should complete

Actual result

build failed

Environment

System: OS: Linux 4.15 Ubuntu 16.04.6 LTS (Xenial Xerus) CPU: (8) x64 AMD FX™-8350 Eight-Core Processor Shell: 4.3.48 - /bin/bash Binaries: Node: 10.14.1 - /usr/local/bin/node Yarn: 1.17.3 - /usr/bin/yarn npm: 6.4.1 - /usr/local/bin/npm Languages: Python: 2.7.12 - /usr/bin/python Browsers: Chrome: 76.0.3809.87 npmPackages: gatsby: ^2.3.16 => 2.18.17 gatsby-image: ^2.0.37 => 2.2.37 gatsby-plugin-feed: ^2.1.0 => 2.3.25 gatsby-plugin-google-analytics: ^2.0.18 => 2.1.31 gatsby-plugin-lodash: ^3.0.5 => 3.1.18 gatsby-plugin-mailchimp: ^5.1.0 => 5.1.2 gatsby-plugin-manifest: ^2.0.28 => 2.2.34 gatsby-plugin-netlify-cache: ^1.2.0 => 1.2.0 gatsby-plugin-netlify-cms: ^4.1.33 => 4.1.33 gatsby-plugin-offline: ^2.0.25 => 2.2.10 gatsby-plugin-prefetch-google-fonts: ^1.4.2 => 1.4.3 gatsby-plugin-react-helmet: ^3.0.12 => 3.1.18 gatsby-plugin-sharp: ^2.0.32 => 2.3.10 gatsby-plugin-styled-components: ^3.0.7 => 3.1.16 gatsby-plugin-typescript: ^2.0.12 => 2.1.23 gatsby-remark-copy-linked-files: ^2.0.11 => 2.1.33 gatsby-remark-images: ^2.0.6 => 2.0.6 gatsby-remark-katex: ^3.0.4 => 3.1.20 gatsby-remark-mermaid: ^1.0.0 => 1.2.0 gatsby-remark-prismjs: ^3.2.8 => 3.3.28 gatsby-remark-relative-images: ^0.2.3 => 0.2.3 gatsby-remark-responsive-iframe: ^2.1.1 => 2.2.30 gatsby-remark-smartypants: ^2.0.9 => 2.1.19 gatsby-source-filesystem: ^2.0.29 => 2.1.43 gatsby-source-instagram: ^0.5.0 => 0.5.1 gatsby-transformer-remark: ^2.3.8 => 2.6.45 gatsby-transformer-sharp: ^2.1.17 => 2.3.9 npmGlobalPackages: gatsby-cli: 2.7.53

[micposso]

I’m getting the error in the default blog starter template: Multiple “root” queries found: “BlogPostBySlug” and “BlogPostBySlug” There is only one root query on my template file templates/blog-post.js. When it’s removed, the homepage loads, but none of the posts work. Is this an issue with the version of gatsbly CLI?

[vladar]

We reworked query extraction recently. The new extractor discovered this error when the old one (erroneously) skipped it.