kiwanami/emacs-deferred — pull request #17 by tkf (2014-03-21 20:49:30+00:00)
Title: Treat process-related variables in deferred.el

This makes process functions in deferred.el more compatible.

Note that there is a slight issue when using `process-environment`. Since it is a list, it could be changed by a side-effect. To even prevent that, we can do `(env (mapcar #'identity (copy-list process-environment)))`. But I am not sure it should be in deferred.el. Probably it should be up to user.