id	summary	reporter	owner	description	type	status	priority	milestone	component	version	severity	resolution	keywords	cc	difficulty	ghcversion	platform
511	requiring consistent package dependencies can give surprising results	guest		"I tried running this command:

{{{
sudo cabal install test-framework test-framework-hunit test-framework-quickcheck test-framework-quickcheck2
}}}

However, Cabal barfed with:

{{{
Resolving dependencies...
cabal: cannot configure test-framework-quickcheck-0.2.1. It requires
QuickCheck >=1.1 && <2
For the dependency on QuickCheck >=1.1 && <2 there are these packages:
QuickCheck-1.1.0.0 and QuickCheck-1.2.0.0. However none of them are available.
QuickCheck-1.1.0.0 was excluded because QuickCheck-2.1.0.1 was selected
instead
QuickCheck-1.1.0.0 was excluded because test-framework-quickcheck2-0.2.1
requires QuickCheck >=2.1.0.0
QuickCheck-1.2.0.0 was excluded because QuickCheck-2.1.0.1 was selected
instead
QuickCheck-1.2.0.0 was excluded because test-framework-quickcheck2-0.2.1
requires QuickCheck >=2.1.0.0
}}}

This seems to be because the quickcheck and quickcheck2 providers for test-framework by design depend on disjoint versions of QuickCheck. This should not confuse cabal install, since installing the packages sequentially in any order works fine:

{{{
sudo cabal install test-framework test-framework-hunit test-framework-quickcheck
sudo cabal install test-framework-quickcheck2
}}}"	defect	new	low	cabal-install-0.16	cabal-install tool	1.6.0.1	normal		solver		unknown