rviz_rendering compile failed and pytest NoneType

[shanpenghui]

I use ros2.repos in release-latest branch to get source and compile it and get following error:

Bug report

Required Info:

• Operating System:
  • Ubuntu 16.04
• Installation type:
  • from source
• Version or commit hash:
  • === ./src/ros2/rviz (git) ===(HEAD detached at 6.1.1)
  • wget https://raw.githubusercontent.com/ros2/ros2/release-latest/ros2.repos && vcs import src < ros2.repos
• DDS implementation:
  • RTI Connext
• Client library (if applicable):
  • N/A

Steps to reproduce issue

I use this command to build

colcon build --symlink-install

After wait for a time, the compile stop and warning by these error:

Starting >>> builtin_interfaces
--- stderr: rviz_rendering                                                                                                                       
In file included from /usr/include/eigen3/Eigen/Core:316:0,
                 from /usr/include/eigen3/Eigen/Dense:1,
                 from /home/sph/ros2_dashing_ws/src/ros2/rviz/rviz_rendering/include/rviz_rendering/objects/covariance_visual.hpp:37,
                 from /home/sph/ros2_dashing_ws/src/ros2/rviz/rviz_rendering/src/rviz_rendering/objects/covariance_visual.cpp:31:
/usr/include/eigen3/Eigen/src/Core/arch/SSE/PacketMath.h:60:39: error: ignoring attributes on template argument ‘__m128 {aka __vector(4) float}’ [-Werror=ignored-attributes]
 template<> struct is_arithmetic<__m128>  { enum { value = true }; };
                                       ^
/usr/include/eigen3/Eigen/src/Core/arch/SSE/PacketMath.h:61:40: error: ignoring attributes on template argument ‘__m128i {aka __vector(2) long long int}’ [-Werror=ignored-attributes]
 template<> struct is_arithmetic<__m128i> { enum { value = true }; };

/usr/include/eigen3/Eigen/src/Core/AssignEvaluator.h:74:57: error: enum constant in boolean context [-Werror=int-in-bool-context]
     MayLinearVectorize = MightVectorize && MayLinearize && DstHasDirectAccess
                          ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~
/usr/include/eigen3/Eigen/src/Core/AssignEvaluator.h:78:41: error: enum constant in boolean context [-Werror=int-in-bool-context]
     MaySliceVectorize  = MightVectorize && DstHasDirectAccess
                          ~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~
cc1plus: all warnings being treated as errors
make[2]: *** [CMakeFiles/rviz_rendering.dir/src/rviz_rendering/objects/covariance_visual.cpp.o] Error 1
make[1]: *** [CMakeFiles/rviz_rendering.dir/all] Error 2
make: *** [all] Error 2
---
Failed   <<< rviz_rendering	[ Exited with code 2 ]
Aborted  <<< builtin_interfaces                                                                                          
Aborted  <<< ament_pclint
Aborted  <<< rttest
[32.877s] ERROR:colcon.colcon_core.event_reactor:Exception in event handler extension 'status': <colcon_core.executor.Job object at 0x7f3fd1c58048>
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/colcon_core/event_reactor.py", line 78, in _notify_observers
    retval = observer(event)
  File "/usr/lib/python3/dist-packages/colcon_notification/event_handler/status.py", line 109, in __call__
    progress = self._running[job].get('progress', [])
KeyError: <colcon_core.executor.Job object at 0x7f3fd1c58048>

[32.886s] ERROR:asyncio:Task was destroyed but it is pending!
task: <Task pending coro=<_fd2callback() done, defined at /usr/lib/python3/dist-packages/colcon_core/subprocess.py:220> wait_for=<Future finished result=None> cb=[_wait.<locals>._on_completion() at /usr/lib/python3.5/asyncio/tasks.py:414]>
[32.886s] ERROR:asyncio:Task was destroyed but it is pending!
task: <Task pending coro=<_fd2callback() done, defined at /usr/lib/python3/dist-packages/colcon_core/subprocess.py:220> wait_for=<Future finished result=None> cb=[_wait.<locals>._on_completion() at /usr/lib/python3.5/asyncio/tasks.py:414]>
[32.886s] ERROR:asyncio:Task was destroyed but it is pending!
task: <Task pending coro=<_fd2callback() done, defined at /usr/lib/python3/dist-packages/colcon_core/subprocess.py:220> wait_for=<Future finished result=None> cb=[_wait.<locals>._on_completion() at /usr/lib/python3.5/asyncio/tasks.py:414]>
[32.886s] ERROR:asyncio:Task was destroyed but it is pending!
task: <Task pending coro=<_fd2callback() done, defined at /usr/lib/python3/dist-packages/colcon_core/subprocess.py:220> wait_for=<Future finished result=None> cb=[_wait.<locals>._on_completion() at /usr/lib/python3.5/asyncio/tasks.py:414]>

Summary: 116 packages finished [32.7s]
  1 package failed: rviz_rendering
  3 packages aborted: ament_pclint builtin_interfaces rttest
  1 package had stderr output: rviz_rendering
  140 packages not processed

I try some methods to solve this problem, such as upgrade the eigen3 or change gcc/g++ from 5 to 7 .etc, but all falied.
And there is a problem that cannot solved is that pytest cannot work in this building workspace.After i install pytest 4.6, i enter the command pytest and it shows the error.

Traceback (most recent call last):
  File "/usr/local/bin/pytest", line 10, in <module>
    sys.exit(main())
  File "/usr/local/lib/python3.5/dist-packages/_pytest/config/__init__.py", line 63, in main
    config = _prepareconfig(args, plugins)
  File "/usr/local/lib/python3.5/dist-packages/_pytest/config/__init__.py", line 207, in _prepareconfig
    pluginmanager=pluginmanager, args=args
  File "/usr/local/lib/python3.5/dist-packages/pluggy/hooks.py", line 289, in __call__
    return self._hookexec(self, self.get_hookimpls(), kwargs)
  File "/usr/local/lib/python3.5/dist-packages/pluggy/manager.py", line 87, in _hookexec
    return self._inner_hookexec(hook, methods, kwargs)
  File "/usr/local/lib/python3.5/dist-packages/pluggy/manager.py", line 81, in <lambda>
    firstresult=hook.spec.opts.get("firstresult") if hook.spec else False,
  File "/usr/local/lib/python3.5/dist-packages/pluggy/callers.py", line 203, in _multicall
    gen.send(outcome)
  File "/usr/local/lib/python3.5/dist-packages/_pytest/helpconfig.py", line 94, in pytest_cmdline_parse
    config = outcome.get_result()
  File "/usr/local/lib/python3.5/dist-packages/pluggy/callers.py", line 80, in get_result
    raise ex[1].with_traceback(ex[2])
  File "/usr/local/lib/python3.5/dist-packages/pluggy/callers.py", line 187, in _multicall
    res = hook_impl.function(*args)
  File "/usr/local/lib/python3.5/dist-packages/_pytest/config/__init__.py", line 687, in pytest_cmdline_parse
    self.parse(args)
  File "/usr/local/lib/python3.5/dist-packages/_pytest/config/__init__.py", line 895, in parse
    self._preparse(args, addopts=addopts)
  File "/usr/local/lib/python3.5/dist-packages/_pytest/config/__init__.py", line 836, in _preparse
    self._consider_importhook(args)
  File "/usr/local/lib/python3.5/dist-packages/_pytest/config/__init__.py", line 784, in _consider_importhook
    self._mark_plugins_for_rewrite(hook)
  File "/usr/local/lib/python3.5/dist-packages/_pytest/config/__init__.py", line 806, in _mark_plugins_for_rewrite
    for name in _iter_rewritable_modules(package_files):
  File "/usr/local/lib/python3.5/dist-packages/_pytest/config/__init__.py", line 625, in _iter_rewritable_modules
    for fn in package_files:
  File "/usr/local/lib/python3.5/dist-packages/_pytest/config/__init__.py", line 803, in <genexpr>
    for file in dist.files
TypeError: 'NoneType' object is not iterable

I have to guess the compile error is caused by pytest error?Is anyone encounter same problem and give some help for me ? Thanks very much.Appreaciate that.

[dirk-thomas]

The release-latest branch now contains ROS 2 Dashing which doesn't support Ubuntu Xenial (see REP 2000). Either choose to upgrade to Ubuntu Bionic or stick to the older ROS 2 release Crystal.

The exception in pytestis a regression in their latest releases 4.6.0 / 4.6.1 / 4.6.2 (see pytest-dev/pytest#5389).There should be a new release coming out soon - until then you can explicitly use an older version like 4.5.x.