version 4.2 coverage combine empties .coverage · Issue #511 · nedbat/coveragepy (original) (raw)

Originally reported by Anonymous

I've been using coverage through tox environments to combine coverage for various python/dependency versions at https://github.com/jcb91/IPython-notebook-extensions and https://github.com/ipython-contrib/jupyter_contrib_nbextensions. This was working fine, until the release of coverage 4.2, since which, coverage combine results in empty .coverage files. I'm unsure exactly why that's happening though.

coverage debug sys give the following output:

              version: 4.2
             coverage: /Users/josh/Documents/workspace/IPython-notebook-extensions/.tox/report/lib/python3.4/site-packages/coverage/__init__.py
           cover_dirs: /Users/josh/Documents/workspace/IPython-notebook-extensions/.tox/report/lib/python3.4/site-packages/coverage
           pylib_dirs: /opt/local/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4
               tracer: CTracer
 plugins.file_tracers: -none-
         config_files: .coveragerc
                       setup.cfg
         configs_read: setup.cfg
            data_path: /Users/josh/Documents/workspace/IPython-notebook-extensions/.coverage
               python: 3.4.4 (default, Mar  2 2016, 03:34:28) [GCC 4.2.1 Compatible Apple LLVM 6.1.0 (clang-602.0.53)]
             platform: Darwin-14.5.0-x86_64-i386-64bit
       implementation: CPython
           executable: /Users/josh/Documents/workspace/IPython-notebook-extensions/.tox/report/bin/python3.4
                  cwd: /Users/josh/Documents/workspace/IPython-notebook-extensions
                 path: 
                       /Users/josh/Documents/workspace/IPython-notebook-extensions/tests
                       /Users/josh/Documents/workspace/IPython-notebook-extensions/.tox/report/lib/python34.zip
                       /Users/josh/Documents/workspace/IPython-notebook-extensions/.tox/report/lib/python3.4
                       /Users/josh/Documents/workspace/IPython-notebook-extensions/.tox/report/lib/python3.4/plat-darwin
                       /Users/josh/Documents/workspace/IPython-notebook-extensions/.tox/report/lib/python3.4/lib-dynload
                       /opt/local/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4
                       /opt/local/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/plat-darwin
                       /Users/josh/Documents/workspace/IPython-notebook-extensions/.tox/report/lib/python3.4/site-packages
                       /Users/josh/Documents/workspace/IPython-notebook-extensions/src
          environment: PYTHONHASHSEED = [174841001 (bb)](https://bitbucket.org/ned/coveragepy/commits/174841001)
                       PYTHONPATH = /Users/josh/Documents/workspace/IPython-notebook-extensions/tests
                       PYTHONUNBUFFERED = yes
         command_line: .tox/report/bin/coverage report --debug=config,dataio,dataop,plugin,sys
         source_match: -none-
    source_pkgs_match: -none-
        include_match: -none-
           omit_match: -none-
          cover_match: /Users/josh/Documents/workspace/IPython-notebook-extensions/.tox/report/lib/python3.4/site-packages/coverage
          pylib_match: /opt/local/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4