id	summary	reporter	owner	description	type	status	priority	milestone	version	resolution	keywords	cc
202	pattern match failure	carter		"when building quickcheck 2.4.2 with ghc 7.5 head (todays github version)
when generating the docs with
haddock version 2.10.0 (built with 7.4)

I get the following error
Running Haddock for QuickCheck-2.4.2...
Warning: The documentation for the following packages are not installed. No
links will be generated to these packages: rts-1.0
Preprocessing library QuickCheck-2.4.2...
Haddock coverage:
haddock: internal error: Pattern match failure in do expression at utils/haddock/src/Haddock/Interface/Create.hs:65:3-10"	defect	closed	major		2.9.4	fixed