build failure with ghc-7.8.4

mikeizbicki / subhask

Type safe interface for working in subcategories of Hask

BSD 3-Clause "New" or "Revised" License

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build failure with ghc-7.8.4 #5

Closed mwotton closed 9 years ago

mwotton commented 9 years ago

src/SubHask/Algebra/Ord.hs:55:1: Conflicting family instance declarations: Mutable m (WithPreludeOrd a0) -- Defined at src/SubHask/Algebra/Ord.hs:55:1 Mutable -- Defined at src/SubHask/Mutable.hs:48:18 cabal: Error: some packages failed to install: subhask-0.1.0.0 failed during the building phase. The exception was: ExitFailure 1

mikeizbicki commented 9 years ago

Thanks for the report. I was using ghc 7.8.2 on the master branch and I didn't have problems. Maybe something's changed with 7.8.4 that's causing this? Either way, I've upgrade to 7.10.1 now and I don't have 7.8 available to reproduce the issue. I'll be mergeing the 7.10 branch into master pretty soon.

mwotton commented 9 years ago

can confirm that 7.8.2 works ok. I wonder what changed...