I have the following matrix:

matrix:
        # Github Actions requires a single row to be added to the build matrix.
        # See https://help.github.com/en/articles/workflow-syntax-for-github-actions.
        name: [
          ubuntu-16.04-gcc-4.8,
          ubuntu-16.04-gcc-4.9,
          ubuntu-16.04-gcc-5,
          ubuntu-16.04-gcc-6,
          ubuntu-16.04-gcc-7,
          ubuntu-16.04-gcc-8,
          ubuntu-16.04-gcc-9,
          ubuntu-16.04-clang-3.5,
          ubuntu-16.04-clang-3.6,
          ubuntu-16.04-clang-3.7,
          ubuntu-16.04-clang-3.8,
          ubuntu-16.04-clang-3.9,
          ubuntu-16.04-clang-4.0,
          ubuntu-16.04-clang-5.0,
          ubuntu-16.04-clang-6.0,
          ubuntu-16.04-clang-7,
          ubuntu-16.04-clang-8,
          windows-2016-cl,
          windows-2016-clang-cl,
          windows-2016-clang,
          windows-2016-gcc,
          windows-2019-cl,
          windows-2019-clang-cl,
          windows-2019-clang,
          windows-2019-gcc,
          macOS-10.14-Xcode-9.4.1,
          macOS-10.14-Xcode-10.0,
          macOS-10.14-Xcode-10.1,
          macOS-10.14-Xcode-10.2,
          macOS-10.14-Xcode-10.2.1,
          macOS-10.14-Xcode-10.3
        ]
    include:
      - name: ubuntu-16.04-gcc-4.8
        os: ubuntu-16.04
        cxx: g++-4.8

      - name: ubuntu-16.04-gcc-4.9
        os: ubuntu-16.04
        cxx: g++-4.9

      - name: ubuntu-16.04-gcc-5
        os: ubuntu-16.04
        cxx: g++-5

      - name: ubuntu-16.04-gcc-6
        os: ubuntu-16.04
        cxx: g++-6

      - name: ubuntu-16.04-gcc-7
        os: ubuntu-16.04
        cxx: g++-7

      - name: ubuntu-16.04-gcc-8
        os: ubuntu-16.04
        cxx: g++-8

      - name: ubuntu-16.04-gcc-9
        os: ubuntu-16.04
        cxx: g++-9

      - name: ubuntu-16.04-clang-3.5
        os: ubuntu-16.04
        cxx: clang++-3.5

      - name: ubuntu-16.04-clang-3.6
        os: ubuntu-16.04
        cxx: clang++-3.6

      - name: ubuntu-16.04-clang-3.7
        os: ubuntu-16.04
        cxx: clang++-3.7

      - name: ubuntu-16.04-clang-3.8
        os: ubuntu-16.04
        cxx: clang++-3.8

      - name: ubuntu-16.04-clang-3.9
        os: ubuntu-16.04
        cxx: clang++-3.9

      - name: ubuntu-16.04-clang-4.0
        os: ubuntu-16.04
        cxx: clang++-4.0

      - name: ubuntu-16.04-clang-5.0
        os: ubuntu-16.04
        cxx: clang++-5.0

      - name: ubuntu-16.04-clang-6.0
        os: ubuntu-16.04
        cxx: clang++-6.0

      - name: ubuntu-16.04-clang-7
        os: ubuntu-16.04
        cxx: clang++-7

      - name: ubuntu-16.04-clang-8
        os: ubuntu-16.04
        cxx: clang++-8

      - name: windows-2016-cl
        os: windows-2016
        cxx: cl

      - name: windows-2016-clang-cl
        os: windows-2016
        cxx: clang-cl

      - name: windows-2016-clang
        os: windows-2016
        cxx: clang++

      - name: windows-2019-cl
        os: windows-2019
        cxx: cl

      - name: windows-2016-gcc
        os: windows-2016
        cxx: g++

      - name: windows-2019-clang-cl
        os: windows-2019
        cxx: clang-cl

      - name: windows-2019-clang
        os: windows-2019
        cxx: clang++

      - name: windows-2019-gcc
        os: windows-2019
        cxx: g++

      - name: macOS-10.14-Xcode-9.4.1
        os: macOS-10.14
        xcode: "9.4.1"
        cxx: clang++

      - name: macOS-10.14-Xcode-10.0
        os: macOS-10.14
        xcode: "10"
        cxx: clang++

      - name: macOS-10.14-Xcode-10.1
        os: macOS-10.14
        xcode: "10.1"
        cxx: clang++

      - name: macOS-10.14-Xcode-10.2
        os: macOS-10.14
        xcode: "10.2"
        cxx: clang++

      - name: macOS-10.14-Xcode-10.2.1
        os: macOS-10.14
        xcode: "10.2.1"
        cxx: clang++

      - name: macOS-10.14-Xcode-10.3
        os: macOS-10.14
        xcode: "10.3"
        cxx: clang++

Now I want to run build both debug and release builds for all these combinations by adding another row to the matrix as follows:

type: ["Debug", "Release"]

Currently this causes Github Actions to get stuck and not execute any jobs at all (See (https://github.com/DaanDeMeyer/doctest/commit/e02916d1f36bb6bcb888f5f3022fe3b7c80a33fa/checks). Might not be relevant anymore by the time someone looks at this).

I’m assuming this is because the include syntax only works when uniquely identifying a single job in the matrix. I would like it to work with entire rows of the matrix so adding the type row as above works without problems.