kiwanami/emacs-deferred — pull request #15 by tkf (2014-03-16 09:50:21+00:00)
Title: Treat deferred error in deferred:sync!

With this change, `deferred:sync!` does not freeze Emacs when error is
occurred in given deferred chain. It can be checked by the following
code:

```cl
(deferred:sync!
(deferred:next
(lambda () (error "this is uncaught error"))))
```