Failure "Error copying directory from" without an explanation why did it fail.
I'm getting this failure:
[1/38] cd /wrkdirs/usr/ports/graphics/py-open3d/work-py27/.build/Python && /usr/local/bin/cmake -E copy_directory /wrkdirs/usr/ports/graphics/py-open3d/work-py27/Open3D-0.2/src/Python/Helper /wrkdirs/usr/ports/graphics/py-open3d/work-py27/.build/lib/
FAILED: Python/CMakeFiles/PythonHelper.util
cd /wrkdirs/usr/ports/graphics/py-open3d/work-py27/.build/Python && /usr/local/bin/cmake -E copy_directory /wrkdirs/usr/ports/graphics/py-open3d/work-py27/Open3D-0.2/src/Python/Helper /wrkdirs/usr/ports/graphics/py-open3d/work-py27/.build/lib/
Error copying directory from "/wrkdirs/usr/ports/graphics/py-open3d/work-py27/Open3D-0.2/src/Python/Helper" to "/wrkdirs/usr/ports/graphics/py-open3d/work-py27/.build/lib/".
There is no explanation why did this failure occur. Please always explain why did it fail: system call failure, process crash, etc.