Error when opening a VHDL source after running via hdlcc/runner.py

[suoto]

Given a configured project and a project file named project.prj, the steps to reproduce are

1. Build the project with hdlcc/runner.py

   runner.py <path/to/project/file> --clean --build

2. Wait for the build to finish. There should be a filename called
   .project.prj, which is the cached info of the project file

3. Launching Vim and to a source inside the project gives the following error

$ vim <path/to/source>
Vim: Caught deadly signal SEGV
  File
  "<path/to/vim-hdl>/autoload/../dependencies/hdlcc/hdlcc/project_builder.py",
  line 287, in _recoverCacheVim: Finished.

      cache = pickle.load(open(cache_fname, 'r'))
      AttributeError: 'module' object has no attribute
      'StandaloneProjectBuilder'
      Segmentation fault

Error is slightly different if the file is opened with gVim

$ gvim <path/to/source>
[xcb] Unknown request in queue while dequeuing
[xcb] Most likely this is a multi-threaded client and XInitThreads has not been
called
[xcb] Aborting, sorry about that.
vim: ../../src/xcb_io.c:179: dequeue_pending_request: Assertion
`!xcb_xlib_unknown_req_in_deq' failed.
Vim: Caught deadly signal ABRT

[suoto]

Issue is related to hdlcc's cache saving and recovering as described in suoto/hdl_checker/issues/4. Issue will be kept open until hdlcc's is fixed.