#8137: Permited mega-polymorphic type -------------------------------------+------------------------------------- Reporter: wvv | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler (Type | Version: 7.6.3 checker) | Operating System: Unknown/Multiple Keywords: | Type of failure: GHC accepts Architecture: Unknown/Multiple | invalid program Difficulty: Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | -------------------------------------+------------------------------------- Mega-polymorphic type! This looks like a bug, but may be it is a feature {{{ u = u b = u 2 + u "extra" "poly" "arguments" True b' = u ++ u True eq' = (u :: Bool) == (u 3.14 :: Bool) eq'' = (u 1 :: Num t => t) == (u "strings" "a lot" :: Num z => z) eq = u == u 2 -- ghci only
:t u u :: t }}}
This code is valid for TypeChecker -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/8137 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler