message: Update main.yml
  trying even older compiler on ubuntu
diff: @@ -170,11 +170,9 @@ jobs:
  linux-release-64:
  name: Linux (64 Bit)
  runs-on: ubuntu-16.04
  - needs: linux-debug
  + # needs: linux-debug
  env:
  - CC: gcc-9
  - CXX: g++-9
  GEN: ninja
  BUILD_ICU: 1
  BUILD_TPCH: 1
  @@ -189,10 +187,7 @@ jobs:
  python-version: '3.7'
  - name: Install
  - run: |
  - sudo add-apt-repository ppa:ubuntu-toolchain-r/test -y
  - sudo apt-get update
  - sudo apt-get install gcc-9 ninja-build
  + run: sudo apt-get install ninja-build
  - name: Build
  run: make
  