398 out of 1025 ports failed because of llvm37 compilation error

[Grzegorz Junka]

How to fix it?

[00:52:02] ====>> [02][00:42:43] Finished build of devel/llvm37: Failed: 
build

Exception occurred:
   File "/usr/local/lib/python2.7/site-packages/sphinx/environment.py", 
line 1261, in get_doctree
     doctree = pickle.load(f)
EOFError
The full traceback has been saved in /tmp/sphinx-err-naeTZg.log, if you 
want to report the issue to the developers.

Grzegorz