#2356: GHC accepts multiple instances for the same type in different modules -------------------------------------+------------------------------------ Reporter: claus | Owner: Type: bug | Status: new Priority: low | Milestone: ⊥ Component: Compiler | Version: 6.8.3 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Unknown/Multiple Type of failure: None/Unknown | Difficulty: Unknown Test Case: | Blocked By: Blocking: | Related Tickets: #5316 -------------------------------------+------------------------------------ Comment (by rwbarton): You can get this kind of instance incoherence without orphan instances or any extensions beyond `FlexibleInstances`. See https://gist.github.com/rwbarton/dd8e51dce2a262d17a80. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/2356#comment:16 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler