[GHC] #7102: Type family instance overlap accepted in ghci
GHC
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Sat Jan 21 00:13:48 UTC 2017
#7102: Type family instance overlap accepted in ghci
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Reporter: exbb2 | Owner: rwbarton
Type: bug | Status: new
Priority: normal | Milestone:
Component: GHCi | Version: 7.4.1
Resolution: | Keywords: TypeFamilies
Operating System: Unknown/Multiple | Architecture:
Type of failure: GHC accepts | Unknown/Multiple
invalid program | Test Case: T7102a, T7102
Blocked By: | Blocking:
Related Tickets: | Differential Rev(s): Phab:D2994
Wiki Page: |
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Comment (by oerjan):
Perhaps the error message for the instance overlap could mention (if in
GHCi) that you can get around it by redeclaring the type family.
--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/7102#comment:13>
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