install python 3.9 python3.9-distutils

Author: jiridanek

.travis.yml

@@ -69,6 +69,11 @@ jobs:
     compiler: clang
     before_install:
     - sudo apt-get install clang-11 llvm-11-dev
+    # Python 3.8.2 in Ubuntu LTS has ASan issues
+    - sudo add-apt-repository -y ppa:deadsnakes/ppa
+    - sudo apt-get update
+    - sudo apt-get install python3.9 python3.9-dev python3.9-distutils
+    - sudo update-alternatives --install /usr/bin/python python /usr/bin/python3.9 10
     # https://github.com/pypa/virtualenv/issues/1740
     # https://github.com/pypa/virtualenv/issues/1873
     - python -m pip install --user --upgrade pip