#8883: FlexibleContexts checking should happen also on inferred signature ------------------------------------------------+-------------------------- Reporter: Blaisorblade | Owner: Type: bug | jstolarek Priority: normal | Status: closed Component: Compiler | Milestone: Resolution: fixed | Version: 7.6.3 Operating System: Unknown/Multiple | Keywords: Type of failure: None/Unknown | Architecture: Test Case: typecheck/should_fail/T8883 | Unknown/Multiple Blocking: | Difficulty: | Unknown | Blocked By: | Related Tickets: ------------------------------------------------+-------------------------- Comment (by Lemming): You can rewrite the constraint {{{ (Functor (PF a), Regular a) }}} to {{{ (PF a ~ pfa, Functor pfa, Regular a) }}} and then it is no longer a FlexibleContext. However, this trick does not work in superclasses since you must only use class parameters there and you cannot introduce new variables. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/8883#comment:15 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler