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### Please describe the problem.
I am getting build errors when trying to compile git-annex with QuickCheck 2.8.2.
### What steps will reproduce the problem?
Build git-annex with QuickCheck 2.8.2, and get the following errors:
[ 30 of 535] Compiling Utility.QuickCheck ( Utility/QuickCheck.hs, dist/build/git-annex/git-annex-tmp/Utility/QuickCheck.o )
Utility/QuickCheck.hs:24:10:
Duplicate instance declarations:
instance (Arbitrary k, Arbitrary v, Eq k, Ord k) =>
Arbitrary (M.Map k v)
-- Defined at Utility/QuickCheck.hs:24:10
instance [safe] (Ord k, Arbitrary k, Arbitrary v) =>
Arbitrary (M.Map k v)
-- Defined in `Test.QuickCheck.Arbitrary'
Utility/QuickCheck.hs:27:10:
Duplicate instance declarations:
instance (Arbitrary v, Eq v, Ord v) => Arbitrary (S.Set v)
-- Defined at Utility/QuickCheck.hs:27:10
instance [safe] (Ord a, Arbitrary a) => Arbitrary (S.Set a)
-- Defined in `Test.QuickCheck.Arbitrary'
### What version of git-annex are you using? On what operating system?
git-annex 6.20160114, on Arch Linux x86_64.
### Have you had any luck using git-annex before? (Sometimes we get tired of reading bug reports all day and a lil' positive end note does wonders)
Yes, it built fine with QuickCheck 2.8. I didn't test with 2.8.1, though.
> ifdefed those instances out with this version of quickcheck. [[done]]
> --[[Joey]]
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