Error: could not call python function 'rosdep2.rospack.init_rospack_interface'

环境

Ubuntu 14.04 + ROS indigo

今早装了个catkin工具，装了部分依赖，然后下午在编译ORB-SLAM2的时候突然被卡住了，一个近乎诡异的报错，提示：

[rospack] Error: could not call python function 'rosdep2.rospack.init_rospack_interface'

详细报错信息如下：

Failed to invoke /opt/ros/indigo/bin/rospack deps-manifests ORB_SLAM2Traceback (most recent call last):  File "/usr/lib/python2.7/dist-packages/rosdep2/rospack.py", line 58, in init_rospack_interface    lookup = _get_default_RosdepLookup(Options())  File "/usr/lib/python2.7/dist-packages/rosdep2/main.py", line 128, in _get_default_RosdepLookup    verbose=options.verbose)  File "/usr/lib/python2.7/dist-packages/rosdep2/sources_list.py", line 613, in create_default    sources = load_cached_sources_list(sources_cache_dir=sources_cache_dir, verbose=verbose)  File "/usr/lib/python2.7/dist-packages/rosdep2/sources_list.py", line 514, in load_cached_sources_list    return parse_sources_data(cache_data, origin=cache_index, model=model)  File "/usr/lib/python2.7/dist-packages/rosdep2/sources_list.py", line 372, in parse_sources_data    raise InvalidData("line:\n\t%s\n%s"%(line, e), origin=origin)rosdep2.core.InvalidData: line:    yaml https://raw.githubusercontent.com/ros/rosdistro/master/rosdep/osx-homebrew.yaml osxunsupported pickle protocol: 4[rospack] Error: could not call python function 'rosdep2.rospack.init_rospack_interface'CMake Error at /opt/ros/indigo/share/ros/core/rosbuild/public.cmake:129 (message):  Failed to invoke rospack to get compile flags for package 'ORB_SLAM2'.  Look above for errors from rospack itself.  Aborting.  Please fix the  broken dependency!Call Stack (most recent call first):  /opt/ros/indigo/share/ros/core/rosbuild/public.cmake:207 (rosbuild_invoke_rospack)  CMakeLists.txt:4 (rosbuild_init)-- Configuring incomplete, errors occurred!

解决方案

sudo rosdep fix-permissionsrosdep update

然后再去cmake编译即可。