Fix CI, prepare test on Python 3.9 beta

.travis.yml

@@ -17,7 +17,8 @@ matrix:
  - $PY_CMD -m pip install --user --upgrade pip wheel setuptools
  install:
  # breathe 4.14 doesn't work with bit fields. See https://github.com/michaeljones/breathe/issues/462
- - $PY_CMD -m pip install --user --upgrade sphinx sphinx_rtd_theme breathe==4.13.1 flake8 pep8-naming pytest
+ # Latest breathe + Sphinx causes warnings and errors out
+ - $PY_CMD -m pip install --user --upgrade "sphinx<3" sphinx_rtd_theme breathe==4.13.1 flake8 pep8-naming pytest
  - curl -fsSL https://sourceforge.net/projects/doxygen/files/rel-1.8.15/doxygen-1.8.15.linux.bin.tar.gz/download | tar xz
  - export PATH="$PWD/doxygen-1.8.15/bin:$PATH"
  script:
@@ -109,7 +110,7 @@ matrix:
  - os: linux
  dist: xenial
  env: PYTHON=3.8 CPP=17 GCC=7
- name: Python 3.8, c++17, gcc 7 (w/o numpy/scipy) # TODO: update build name when the numpy/scipy wheels become available
+ name: Python 3.8, c++17, gcc 7
  addons:
  apt:
  sources:
@@ -119,12 +120,21 @@ matrix:
  - g++-7
  - python3.8-dev
  - python3.8-venv
- # Currently there is no numpy/scipy wheels available for python3.8
- # TODO: remove next before_install, install and script clause when the wheels become available
- before_install:
- - pyenv global $(pyenv whence 2to3) # activate all python versions
- - PY_CMD=python3
- - $PY_CMD -m pip install --user --upgrade pip wheel setuptools
+ - os: linux
+ dist: xenial
+ env: PYTHON=3.9 CPP=17 GCC=7
+ name: Python 3.9 beta, c++17, gcc 7 (w/o numpy/scipy) # TODO: update build name when the numpy/scipy wheels become available
+ addons:
+ apt:
+ sources:
+ - deadsnakes
+ - ubuntu-toolchain-r-test
+ packages:
+ - g++-7
+ - python3.9-dev
+ - python3.9-venv
+ # Currently there are no numpy/scipy wheels available for python3.9
+ # TODO: remove next install and script clause when the wheels become available
  install:
  - $PY_CMD -m pip install --user --upgrade pytest
  script:
@@ -143,14 +153,25 @@ matrix:
  # Test a PyPy 2.7 build
  - os: linux
  dist: trusty
- env: PYPY=5.8 PYTHON=2.7 CPP=11 GCC=4.8
- name: PyPy 5.8, Python 2.7, c++11, gcc 4.8
+ env: PYPY=7.3.1 PYTHON=2.7 CPP=11 GCC=4.8
+ name: PyPy 7.3, Python 2.7, c++11, gcc 4.8
+ addons:
+ apt:
+ packages:
+ - libblas-dev
+ - liblapack-dev
+ - gfortran
+ - os: linux
+ dist: xenial
+ env: PYPY=7.3.1 PYTHON=3.6 CPP=11 GCC=5
+ name: PyPy 7.3, Python 3.6, c++11, gcc 5
  addons:
  apt:
  packages:
  - libblas-dev
  - liblapack-dev
  - gfortran
+ - g++-5
  # Build in 32-bit mode and tests against the CMake-installed version
  - os: linux
  dist: trusty
@@ -170,6 +191,10 @@ matrix:
  cmake ../pybind11-tests ${CMAKE_EXTRA_ARGS} -DPYBIND11_WERROR=ON
  make pytest -j 2"
  set +ex
+ allow_failures:
+ - name: PyPy 7.3, Python 2.7, c++11, gcc 4.8
+ - name: PyPy 7.3, Python 3.6, c++11, gcc 5
+ - name: Python 3.9 beta, c++17, gcc 7 (w/o numpy/scipy)
 cache:
  directories:
  - $HOME/.local/bin
@@ -211,9 +236,9 @@ before_install:
  SCRIPT_RUN_PREFIX="docker exec --tty $containerid"
  $SCRIPT_RUN_PREFIX sh -c 'for s in 0 15; do sleep $s; apt-get update && apt-get -qy dist-upgrade && break; done'
  else
- if [ "$PYPY" = "5.8" ]; then
- curl -fSL https://bitbucket.org/pypy/pypy/downloads/pypy2-v5.8.0-linux64.tar.bz2 | tar xj
- PY_CMD=$(echo `pwd`/pypy2-v5.8.0-linux64/bin/pypy)
+ if [ -n "$PYPY" ]; then
+ curl -fSL https://bitbucket.org/pypy/pypy/downloads/pypy$PYTHON-v$PYPY-linux64.tar.bz2 | tar xj
+ PY_CMD=$(echo `pwd`/pypy$PYTHON-v$PYPY-linux64/bin/pypy$PY)
  CMAKE_EXTRA_ARGS+=" -DPYTHON_EXECUTABLE:FILEPATH=$PY_CMD"
  else
  PY_CMD=python$PYTHON
@@ -255,11 +280,12 @@ install:
  export NPY_NUM_BUILD_JOBS=2
  echo "Installing pytest, numpy, scipy..."
  local PIP_CMD=""
- if [ -n $PYPY ]; then
+ if [ -n "$PYPY" ]; then
  # For expediency, install only versions that are available on the extra index.
  travis_wait 30 \
- $PY_CMD -m pip install --user --upgrade --extra-index-url https://imaginary.ca/trusty-pypi \
- pytest numpy==1.15.4 scipy==1.2.0
+ $PY_CMD -m pip install --user --upgrade --extra-index-url https://antocuni.github.io/pypy-wheels/manylinux2010 \
+ numpy scipy
+ $PY_CMD -m pip install --user --upgrade pytest
  else
  $PY_CMD -m pip install --user --upgrade pytest numpy scipy
  fi

tests/test_stl_binders.py

@@ -67,6 +67,7 @@ def test_vector_int():
  v_int2.clear()
  assert len(v_int2) == 0
 
+
 # related to the PyPy's buffer protocol.
 @pytest.unsupported_on_pypy
 def test_vector_buffer():