haskell/haskell-mode — pull request #406 by ikirill (2014-12-28 02:33:29+00:00)
Title: Address compiler error/warning.

Since it is 'cl-lib that is being imported, not 'cl, one should use the macros starting with cl-. (Try adding (require 'cl) to see this.) Usually both names would be aliases, but the byte-compiler might not be seeing that.